CN110354810B - Method for removing thiophene sulfides from fuel oil by using SiO2-MTES-APTES-Ag composite aerogel - Google Patents
Method for removing thiophene sulfides from fuel oil by using SiO2-MTES-APTES-Ag composite aerogel Download PDFInfo
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- CN110354810B CN110354810B CN201910651491.9A CN201910651491A CN110354810B CN 110354810 B CN110354810 B CN 110354810B CN 201910651491 A CN201910651491 A CN 201910651491A CN 110354810 B CN110354810 B CN 110354810B
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- aptes
- mtes
- sio
- thiophene
- composite aerogel
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- 239000004964 aerogel Substances 0.000 title claims description 76
- 239000002131 composite material Substances 0.000 title claims description 65
- JBGWMRAMUROVND-UHFFFAOYSA-N 1-sulfanylidenethiophene Chemical class S=S1C=CC=C1 JBGWMRAMUROVND-UHFFFAOYSA-N 0.000 title claims description 52
- 239000000295 fuel oil Substances 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 29
- 238000001179 sorption measurement Methods 0.000 claims description 81
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims description 48
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 claims description 43
- 239000003463 adsorbent Substances 0.000 claims description 36
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene Chemical compound C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 claims description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 29
- 229910052681 coesite Inorganic materials 0.000 claims description 28
- 229910052906 cristobalite Inorganic materials 0.000 claims description 28
- 239000000377 silicon dioxide Substances 0.000 claims description 28
- 229910052682 stishovite Inorganic materials 0.000 claims description 28
- 229910052905 tridymite Inorganic materials 0.000 claims description 28
- 229930192474 thiophene Natural products 0.000 claims description 25
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 22
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 20
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 claims description 16
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- 239000011593 sulfur Substances 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052709 silver Inorganic materials 0.000 claims description 13
- 239000004332 silver Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(I) nitrate Inorganic materials [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000011069 regeneration method Methods 0.000 claims description 10
- 230000008929 regeneration Effects 0.000 claims description 9
- XNRNVYYTHRPBDD-UHFFFAOYSA-N [Si][Ag] Chemical compound [Si][Ag] XNRNVYYTHRPBDD-UHFFFAOYSA-N 0.000 claims description 8
- 150000003568 thioethers Chemical class 0.000 claims description 7
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 235000019441 ethanol Nutrition 0.000 claims description 3
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N ortho-diethylbenzene Natural products CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 230000032683 aging Effects 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- HSIWYNQXFOPDHD-UHFFFAOYSA-N triethoxy(methyl)silane;3-triethoxysilylpropan-1-amine Chemical compound CCO[Si](C)(OCC)OCC.CCO[Si](OCC)(OCC)CCCN HSIWYNQXFOPDHD-UHFFFAOYSA-N 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 description 31
- 230000023556 desulfurization Effects 0.000 description 31
- 238000002474 experimental method Methods 0.000 description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 230000000149 penetrating effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000002808 molecular sieve Substances 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 7
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 6
- 238000010668 complexation reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- LPIQUOYDBNQMRZ-UHFFFAOYSA-N cyclopentene Chemical compound C1CC=CC1 LPIQUOYDBNQMRZ-UHFFFAOYSA-N 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 238000002454 metastable transfer emission spectrometry Methods 0.000 description 3
- 101710134784 Agnoprotein Proteins 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 150000003577 thiophenes Chemical class 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- NPPHEVSPZGYDHP-UHFFFAOYSA-N [S].C1=CC=C2SC=CC2=C1 Chemical compound [S].C1=CC=C2SC=CC2=C1 NPPHEVSPZGYDHP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
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- B01J20/28047—Gels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28064—Surface area, e.g. B.E.T specific surface area being in the range 500-1000 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28066—Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G25/00—Refining of hydrocarbon oils in the absence of hydrogen, with solid sorbents
- C10G25/003—Specific sorbent material, not covered by C10G25/02 or C10G25/03
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G25/00—Refining of hydrocarbon oils in the absence of hydrogen, with solid sorbents
- C10G25/12—Recovery of used adsorbent
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/02—Gasoline
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
本发明公开了利用SiO2‑MTES‑APTES‑Ag复合气凝胶脱除燃料油中噻吩类硫化物的方法，属于燃料油加工技术领域。该方法以正硅酸乙酯为硅源、以3‑氨丙基三乙氧基硅烷为氨源，并引入甲基三乙氧基硅烷进行改性，以硝酸银为银源,采用溶胶凝胶—常压干燥法制得SiO2‑MTES‑APTES‑Ag复合气凝胶，将其定量填装于固定床吸附装置中，在一定温度与空速下，注入含噻吩类硫化物的模拟汽油，在反应装置的下端出口处收集吸附后的模拟汽油，进行色谱分析。结果表明SiO2‑MTES‑APTES‑Ag复合气凝胶对噻吩类硫化物有很好的吸附性能。本发明中SiO2‑MTES‑APTES‑Ag复合气凝胶吸附剂的制备方法简单、成本低廉，该吸附剂可多次重复使用、经济效益高、环境友好、其吸附条件温和、对吸附设备的要求低。The invention discloses a method for removing thiophene sulfides in fuel oil by utilizing SiO2 -MTES-APTES-Ag composite aerogel, and belongs to the technical field of fuel oil processing. In the method, tetraethyl orthosilicate is used as the silicon source, 3-aminopropyltriethoxysilane is used as the ammonia source, methyltriethoxysilane is introduced for modification, silver nitrate is used as the silver source, and sol gelation is adopted. The SiO 2 -MTES-APTES-Ag composite aerogel was prepared by the glue-atmospheric drying method, and it was quantitatively filled in a fixed bed adsorption device, and the simulated gasoline containing thiophene sulfide was injected under a certain temperature and space velocity, The adsorbed simulated gasoline was collected at the outlet at the lower end of the reaction device for chromatographic analysis. The results show that the SiO 2 ‑MTES‑APTES‑Ag composite aerogel has good adsorption performance for thiophene sulfides. The preparation method of the SiO2 -MTES-APTES-Ag composite aerogel adsorbent in the present invention is simple and low in cost, the adsorbent can be reused for many times, has high economic benefits, is environmentally friendly, has mild adsorption conditions, and is not effective for adsorption equipment. Low requirements.
Description
Technical Field
The invention belongs to the technical field of fuel oil processing, and particularly relates to a SiO-based fuel oil2A method for removing thiophene sulfides in fuel oil by using-MTES-APTES-Ag composite aerogel as an adsorbent.
Background
With the rapid development of the automobile industry, the emission of a large amount of sulfides in the automobile exhaust not only makes the environmental pollution problem become serious, but also threatens the human health. Fuel cells also have a relatively high demand for sulfur content in fuel oil, and the presence of organic sulfides poisons the catalyst in the fuel cell electrodes, rendering the fuel cell ineffective at converting the chemical energy in diesel and gasoline into electrical energy. Therefore, deep desulfurization of fuel oil has become a focus of global attention.
At present, the desulfurization process of fuel oil mainly comprises hydrodesulfurization technology, alkylation desulfurization technology, biological desulfurization technology, extraction desulfurization technology, oxidation desulfurization technology, adsorption desulfurization technology and the like. In the existing industrial production, the main process of desulfurization is still the traditional hydrodesulfurization, but the main process has the defects of higher operation cost, large hydrogen consumption, harsh operation conditions, octane number reduction in gasoline and the like. And the hydrodesulfurization only has good effect on mercaptan, thioether, inorganic sulfur and the like, and has poor desulfurization effect on thiophene sulfides with extremely high thermal stability. The adsorption desulfurization is the most promising desulfurization method at present due to the advantages of low cost, mild operation conditions, good desulfurization effect, no environmental pollution and the like.
The key of the pi-complex adsorption desulfurization lies in preparing a high-efficiency pi-complex adsorbent. The metal ion commonly used for preparing the pi-complexation desulfurization adsorbent is Cu2+、Ag+、Ni2+、Co2+And the like. And the preparation of the pi-complex desulfurization adsorbent needs to disperse the metal ions on a carrier with high specific surface area. The pi-complex desulfurization adsorbent can be classified into molecular sieves, activated carbons and metal oxides according to the difference of carriers.
Pi complex desulfurizing adsorbent with molecular sieve as carrier. The Shenyang chemical industry university (publication No. CN 103170305A) uses a 13X molecular sieve loaded with Ag ions as a desulfurization adsorbent and is used for deeply removing thiophene and derivatives thereof and benzothiophene in gasoline. Wherein, the content of silver element accounts for 3 percent to 5 percent of the total weight of the adsorbent, and the silver element is in an ionic state. A molecular sieve adsorbent for deeply removing sulfide is prepared by Chinese academy of sciences (publication No. CN 1511629A) and is composed of Y-type molecular sieve loaded with metal salts. The pi complex adsorbent has low carrier cost, simple preparation process and capacity of being regenerated circularly. However, the transition metal ions exchanged by the microporous molecular sieve desulfurization adsorbent are limited in number, the adsorption capacity to sulfide is not large, and the microporous molecular sieve has a microporous structure, so that large-molecular thiophene sulfides cannot enter a pore channel due to the molecular size effect to form pi complexation with metal ions, namely deep desulfurization cannot be achieved.
Pi-complex desulfurizing adsorbent with active carbon as carrier. Shenyang chemical university (publication No. CN 103143322A) prepared an active carbon adsorbent loaded with Fe ions for treating thiophene and its derivatives in gasolineHas larger adsorption capacity and selectivity, simple preparation method, easy regeneration and long service life of the adsorbent. The method is implemented by adopting salt containing Al, Zn, Ni and other metals and H (publication No. CN 104549143A)3PO4The modified active carbon is used as an auxiliary agent to modify and modify the active carbon, so that the problems that a single adsorbent cannot simultaneously and effectively remove various sulfides, the removal rate of sulfur is low, the penetrating sulfur capacity of a desulfurizer is low and the like in the gas raw material adsorption, purification and desulfurization technology are solved. However, the pore structure of the activated carbon is mainly microporous, and the adsorption capacity of the modified activated carbon to thiophene macromolecular sulfides is still very small, so that the requirements of industrial production are difficult to meet.
Pi complex desulfurizing adsorbent with metal oxide as carrier. Nantong university (publication No. CN 10300787A) mesoporous gamma-Al doped with copper element2O3The catalyst is contacted with sulfur-containing fuel oil, and desulfurization is realized by using an adsorption method, so that the catalyst is low in operation cost, large in adsorption capacity and convenient to regenerate. China petrochemical company Limited (publication No. CN 10161923A) prepares a desulfurization adsorbent, which comprises alumina as binder and zinc oxide as carrier, and contacts with complexing agent solution, and then carries metal promoter. It is used for desulfurizing fuel oil, and has high activity and great sulfur adsorbing capacity. However, in the preparation process, metal ions easily block metal oxide pore channels, so that loaded active components are accumulated on the surface and cannot enter the pore channels to provide active sites, and the adsorption desulfurization performance is reduced.
Zhejiang industrial university (publication No. CN 201811557282) prepared highly selective and highly reproducible SiO2APTES hybrid aerogel desulfurization sorbent by reacting SiO2Hybrid crosslinking with APTES on SiO2Surface introduction of-NH2And hydrogen bonds are formed with thiophene sulfides, so that the desulfurization adsorption performance is improved. But SiO2APTES aerogel has the disadvantage of low adsorption capacity, by adding MTES to SiO2Surface introduction of-CH3The hydrophobicity is improved, so that the pore diameter collapse is reduced in the normal pressure drying process, and the specific surface area is increased. On the basis of which SiO can pass through2surface-NH2Chelating Ag+Increasing the doping amount of Ag, and further passing through Ag+The pi complexation with thiophene sulfides can improve SiO2Purpose of APTES hybrid aerogel desulfurization adsorbent adsorption capacity.
Disclosure of Invention
In view of the above technical problems in the prior art, the present invention aims to provide a SiO-based material2The invention relates to a method for removing thiophene sulfides in fuel oil by using (E) -MTES-APTES-Ag composite aerogel as an adsorbent, in particular to a method for removing thiophene sulfides in fuel oil by using SiO2The preparation method of the-MTES-APTES-Ag composite aerogel adsorbent is simple, low in cost, reusable, high in economic benefit, environment-friendly, mild in adsorption condition and low in requirement on adsorption equipment.
The method for removing the thiophene sulfides in the fuel oil is characterized in that SiO is used2-MTES-APTES-Ag composite aerogel is used as an adsorbent, and the adsorbent is filled into a fixed bed adsorption device at the temperature of 0-100 ℃ for 1-10 h-1The simulated gasoline containing the thiophene sulfides is introduced into the reactor at the airspeed, and the simulated gasoline with the sulfur concentration of less than 1ppm is obtained after adsorption.
The method for removing the thiophene sulfides in the fuel oil is characterized in that the adsorbed thiophene sulfides are thiophene, benzothiophene or dibenzothiophene.
The method for removing the thiophene sulfides in the fuel oil is characterized in that SiO2The MTES-APTES-Ag composite aerogel adsorbent is prepared by taking a silicon source, an ammonia source, a silver source and a modifier as raw materials and adopting a sol-gel-normal pressure drying method; the modifier is methyl triethoxysilane.
The method for removing the thiophene sulfides in the fuel oil is characterized by preparing SiO2The silicon source of the MTES-APTES-Ag composite aerogel adsorbent is tetraethoxysilane, the ammonia source is 3-aminopropyltriethoxysilane, and the silver source is silver nitrate.
The method for removing the thiophene sulfides in the fuel oil is characterized in that SiO2Silicon and silver in-MTES-APTES-Ag composite aerogel adsorbentThe molar ratio is 25-150: 1, preferably 50: 1.
the method for removing thiophene sulfides in fuel oil is characterized in that the hourly space velocity of simulated gasoline containing thiophene, benzothiophene or dibenzothiophene is 1-5 h-1。
The method for removing the thiophene sulfides in the fuel oil is characterized in that SiO2The adsorption temperature of the-MTES-APTES-Ag composite aerogel for adsorbing thiophene, benzothiophene or dibenzothiophene is 0-60 ℃.
The method for removing the thiophene sulfides in the fuel oil is characterized in that the sulfur concentration of thiophene, benzothiophene or dibenzothiophene in the adsorbed simulated gasoline is 0.1-10 mgS/g, preferably 0.1-5 mgS/g.
The method for removing the thiophene sulfides in the fuel oil is characterized in that the adsorbed simulated gasoline is doped with 20wt% of cyclohexene or 20wt% of toluene.
The method for removing the thiophene sulfides in the fuel oil is characterized in that the adsorbed SiO2And (3) eluting and regenerating the MTES-APTES-Ag composite aerogel adsorbent by using a solvent, wherein the solvent used for regeneration is cyclohexene, diethyl ether, benzene or toluene.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) SiO of the invention2the-MTES-APTES-Ag composite aerogel has a typical mesoporous characteristic pore diameter (5-20 nm), high porosity (85-99%), and a high specific surface area (600-1500 m)2G), so that the thiophene sulfides can enter the pores of the aerogel without obstruction and can be fully contacted and adsorbed.
2) SiO of the invention2-MTES-APTES-Ag composite aerogel, with SiO2Compared with aerogel, the aerogel introduces-CH into the silicon skeleton structure3The hydrophobicity is improved, so that the aperture collapse is reduced in the normal pressure drying process, the specific surface area is increased, and-NH is introduced into the aerogel silicon skeleton structure2，-NH2Can be reacted with S-form in thiophene, benzothiophene or dibenzothiopheneHydrogen bonding and simultaneous chelation by-NH2Anchored Ag+The material can generate pi complexation with thiophene sulfides, and the synergistic effect of the pi complexation and the hydrogen bond can further improve the adsorption performance of the adsorbent on the thiophene sulfides;
3) SiO of the invention2Compared with other existing adsorbents, the MTES-APTES-Ag composite aerogel still has higher adsorption selectivity on thiophene sulfides in simulated gasoline in the presence of aromatic hydrocarbon, olefin and the like.
4) SiO of the invention2The MTES-APTES-Ag composite aerogel adsorbent has good adsorption performance on thiophene sulfides, can be regenerated by washing with a solvent, and still has good adsorption performance after regeneration;
5) the adsorption reaction of the invention is carried out under normal pressure, the adsorption condition is mild, the requirement on adsorption equipment is low, the operation is convenient, and the invention has good adsorption effect on thiophene compounds.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
And the silicon-silver molar ratio is 37.5:1 SiO2The preparation method of the MTES-APTES-Ag composite aerogel adsorbent is as follows:
20mL EtOH, 6mL TEOS, 2mL MTES, 1mL H2Vigorously stirring and uniformly mixing the O mixed solution under an acidic condition, adding ammonia water to adjust the pH value to 6.5, then slowly adding 2mL of APTES, and standing at room temperature for about 15min to obtain SiO2-MTES-APTES hybrid alcoholic gel, then mixed at a volume ratio of 25:15 aging in absolute ethyl alcohol/n-silicon acetate for 16h to enhance the skeleton structure of the gel, then using n-hexane to perform solvent replacement on the gel, replacing the solvent twice within 24h, and removing the ethanol, water, acid and other organic molecules in the gel. Then the solvent-displaced aerogel was crushed and then 0.16g AgNO was added3Dissolving in 1mL deionized water to form AgNO3Solution of AgNO3The solution was added dropwise to the above milled aerogel under stirring and left to stand overnight. Finally drying for 4h at 120 ℃ to obtain silicon-silver molThe molar ratio is 37.5:1 SiO2-MTES-APTES-Ag composite aerogel. Preparation of SiO in examples 1 to 30 and comparative examples 1 to 22During the process of the MTES-APTES-Ag composite aerogel adsorbent, the feeding amount of TEOS, MTES and APTES is not changed, and AgNO is changed under the condition that other conditions are not changed in the preparation method3The SiO with different silicon-silver molar ratios can be obtained2-MTES-APTES-Ag composite aerogel.
Examples 1 to 5: SiO of different Si/Ag molar ratios2The MTES-APTES-Ag composite aerogel has the adsorption performance on thiophene sulfides in simulated gasoline.
In the preparation of SiO by sol-gel process2In the-MTES-APTES-Ag composite aerogel, the silicon source is tetraethoxysilane, and the prepared SiO is2Carrying out a penetration adsorption desulfurization experiment on the MTES-APTES-Ag composite aerogel, and specifically operating as follows: in a fixed bed reactor, the bottom layer is filled with a proper amount of absorbent cotton, and then filled with 1g of SiO2-MTES-APTES-Ag composite aerogel and a proper amount of quartz sand. Before the start of the adsorption experiment, the loaded adsorbent was thoroughly wetted with n-heptane. Simulated gasoline is introduced, and the adsorbed simulated gasoline is collected at the outlet at the lower end of the reactor and subjected to chromatographic analysis, and the breakthrough point is determined when the sulfur concentration in the effluent is 0.005 mgS/g. Selecting SiO with silicon-silver molar ratio of 150, 75, 50, 37.5 and 25 respectively2MTES-APTES-Ag composite aerogel, and carrying out a penetrating adsorption experiment on thiophene sulfides in the simulated gasoline. During the experiment: space velocity of 1h-1The adsorption temperature is room temperature, and the sulfur concentration of thiophene, benzothiophene or dibenzothiophene in the simulated gasoline is 2mg S/g. The breakthrough adsorption capacities of the obtained thiophenes, benzothiophenes and dibenzothiophenes are shown in table 1.
TABLE 1 SiO for different Si/Ag molar ratios2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
As can be seen from Table 1, the different siliconMolar ratio of silver SiO2The MTES-APTES-Ag composite aerogel increases and then decreases the penetrating adsorption capacity of thiophene and benzothiophene along with the decrease of the mole ratio of silicon to silver. At a silicon-silver molar ratio of 37.5:1, the breakthrough adsorption capacity of thiophene, benzothiophene, and dibenzothiophene reaches a maximum, and therefore a silicon-silver molar ratio of 37.5:1 SiO2-MTES-APTES-Ag composite aerogel.
Examples 6 to 10: different space velocity pairs of SiO2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
Selecting SiO with the mol ratio of silicon to silver of 37.5:12-MTES-APTES-Ag composite aerogel. At a space velocity of 1h-1、3h-1、5h-1、8h-1、10h-1Next, a breakthrough adsorption experiment was performed on thiophene sulfides in the simulated gasoline. The operation of the breakthrough adsorption experiment was the same as in examples 1 to 5, and the adsorption results are shown in Table 2.
TABLE 2 SiO at different airspeeds2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
As can be seen from Table 2, SiO decreases with decreasing space velocity2The penetrating adsorption capacity of the-MTES-APTES-Ag composite aerogel on thiophene, benzothiophene and dibenzothiophene is gradually increased, and when the air speed is reduced to 3h-1Then, the penetrating adsorption capacity of the thiophene sulfides is not changed greatly, so that the preferred space velocity is 1-3 h-1。
Examples 11 to 15: different adsorption temperatures for SiO2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
Selecting a silicon-silver molar ratio of 37.5:1 SiO2-MTES-APTES-Ag composite aerogel. The adsorption temperature is respectively selected to be 0 ℃, 25 ℃, 40 ℃, 80 ℃ and 100 ℃, and the penetration adsorption experiment is carried out on the thiophene sulfides in the simulated gasoline. The operation of the breakthrough adsorption experiment was the same as in examples 1 to 5, and the adsorption results are shown in Table 3.
TABLE 3 SiO at different adsorption temperatures2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
As can be seen from Table 3, SiO increases with the adsorption temperature2The penetrating adsorption capacity of the MTES-APTES-Ag composite aerogel on thiophene, benzothiophene and dibenzothiophene is gradually reduced, and the adsorption penetrating capacity of the thiophene, benzothiophene and dibenzothiophene is very small after 80 ℃, which indicates that the composite aerogel is coated with SiO at the temperature2The MTES-APTES-Ag composite aerogel adsorbed thiophene, benzothiophene and dibenzothiophene has been desorbed. Therefore, the preferential adsorption temperature is 0 to 40 ℃.
Examples 16 to 21: simulating SiO in gasoline at different sulfur concentrations2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides
Selecting SiO with the mol ratio of silicon to silver of 37.5:12-MTES-APTES-Ag composite aerogel. The sulfur concentrations of thiophene, benzothiophene, or dibenzothiophene in the simulated gasoline were 0.1mgS/g, 0.5mgS/g, 1mgS/g, 2mgS/g, 5mgS/g, and 10mgS/g, respectively, and the breakthrough adsorption experiments were performed. The breakthrough adsorption was performed as in examples 1 to 5, and the adsorption results are shown in Table 4.
Table 4 simulates SiO in gasoline at different sulfur concentrations2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides
As can be seen from Table 4, SiO increases with the concentration of thiophene, benzothiophene, or dibenzothiophene sulfur in the simulated gasoline2The penetrating adsorption capacity of the-MTES-APTES-Ag composite aerogel on thiophene, benzothiophene and dibenzothiophene is reduced, so that the concentration of thiophene or benzothiophene sulfur in the simulated gasoline is preferably 0.1-2 mgS/g.
Example of the implementation22-23: different olefins to SiO2The influence of the MTES-APTES-Ag composite aerogel on the adsorption performance of thiophene sulfides in the simulated gasoline is realized.
Selecting SiO with the mol ratio of silicon to silver of 37.5:12-MTES-APTES-Ag composite aerogel. SiO 22The MTES-APTES-Ag composite aerogel performs a penetrating adsorption experiment on simulated gasoline containing 20wt% of cyclohexene and 20wt% of cyclopentene. The operation of the breakthrough adsorption experiment was the same as in examples 1 to 5, and the adsorption results are shown in Table 5.
TABLE 5 competitive adsorption of olefins to SiO2Influence of-MTES-APTES-Ag composite aerogel desulfurization adsorption Performance
As can be seen from Table 5, the simulated gasoline was blended with cyclohexene, cyclopentene and SiO2The desulfurization performance of the MTES-APTES-Ag composite aerogel is less influenced.
Examples 24-25: different aromatic hydrocarbons to SiO2The influence of the MTES-APTES-Ag composite aerogel on the adsorption performance of thiophene sulfides in the simulated gasoline is realized.
Selecting SiO with the mol ratio of silicon to silver of 37.5:12-MTES-APTES-Ag composite aerogel. SiO 22The MTES-APTES-Ag composite aerogel performs a penetrating adsorption experiment on simulated gasoline containing 20wt% of benzene and 20wt% of toluene. The operation of the breakthrough adsorption experiment was the same as in examples 1 to 5, and the adsorption results are shown in Table 6.
TABLE 6 competitive adsorption of aromatics to SiO2Influence of-MTES-APTES-Ag composite aerogel desulfurization adsorption Performance
As can be seen from Table 6, the simulated gasoline is doped with benzene, toluene and SiO 22The desulfurization effect of the-MTES-APTES-Ag composite aerogel is small, and SiO is2The MTES-APTES-Ag composite aerogel has higher selectivity and higher adsorption capacity.
Example 27-30: different regeneration solvents to SiO2Regeneration adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
Selecting SiO with the mol ratio of silicon to silver of 37.5:12-MTES-APTES-Ag composite aerogel. SiO after use in example 4 was initially treated with cyclohexene, diethyl ether, benzene or toluene2Eluting thiophene sulfides in the-MTES-APTES-Ag composite aerogel, and then using n-heptane to carry out SiO reaction2Eluting the regenerated solvent in the MTES-APTES-Ag composite aerogel, and performing a penetrating adsorption experiment on thiophene sulfides in the simulated gasoline. The operation of the breakthrough adsorption experiment was the same as in examples 1 to 5, and the adsorption results are shown in Table 7.
TABLE 7 different regeneration solvents vs. SiO2Adsorption performance of MTES-APTES-Ag composite aerogel on thiophene sulfides in simulated gasoline
As can be seen from Table 7, regenerated SiO2The solvent used by the-MTES-APTES-Ag composite aerogel is cyclohexene, ether, benzene and toluene, and the regeneration effect is good. When benzene is selected, SiO2The MTES-APTES-Ag composite aerogel has the best effect on the regeneration of thiophene, benzothiophene and dibenzothiophene. Thus, the preferred regeneration solvent is benzene.
Claims (8)
1. A method for removing thiophene sulfides from fuel oil is characterized in that SiO is used2-MTES-APTES-Ag composite aerogel is used as an adsorbent, and the adsorbent is filled into a fixed bed adsorption device at the temperature of 0-100 ℃ for 1-10 h-1Introducing simulated gasoline containing thiophene sulfides at the airspeed, and adsorbing to obtain the simulated gasoline with the sulfur concentration of less than 1 ppm;
SiO2the preparation method of the-MTES-APTES-Ag composite aerogel adsorbent comprises the following steps: 20mL EtOH, 6mL TEOS, 2mL MTTES, 1mL H2The mixed solution of O is stirred vigorously and mixed evenly under the acid condition, ammonia water is added to adjust the pH value to 6.5, 2mL of APTES is added dropwise and slowly, and the mixture is kept still at room temperatureStanding for about 15min to obtain SiO2And (2) aging the MTES-APTES hybrid alcohol gel in absolute ethyl alcohol/ethyl orthosilicate with the volume ratio of 25:15 for 16h to strengthen the skeleton structure of the gel, then carrying out solvent replacement on the gel by using n-hexane, replacing the solvent twice for 24h, and removing the ethanol, water, acid and other organic molecules in the gel. The solvent-displaced aerogel was then crushed, followed by 0.16g AgNO3Dissolving in 1mL deionized water to form AgNO3Solution of AgNO3The solution was added dropwise to the milled aerogel with stirring and allowed to stand overnight. And finally drying at 120 ℃ for 4h to obtain the silicon-silver molar ratio of 37.5:1 SiO2-MTES-APTES-Ag composite aerogel.
2. The method for removing thiophene sulfides from fuel oil according to claim 1, wherein the adsorbed thiophene sulfides are thiophene, benzothiophene, or dibenzothiophene.
3. The method for removing thiophene sulfides from fuel oil according to claim 1, wherein the SiO is2-the molar ratio of silicon to silver in the MTES-APTES-Ag composite aerogel adsorbent is 50: 1.
4. the method for removing thiophene sulfides in fuel oil according to claim 1, wherein the hourly space velocity of the simulated gasoline containing thiophene, benzothiophene or dibenzothiophene is 1-5 h-1。
5. The method for removing thiophene sulfides from fuel oil according to claim 1, wherein the SiO is2The adsorption temperature of the-MTES-APTES-Ag composite aerogel for adsorbing thiophene, benzothiophene or dibenzothiophene is 0-60 ℃.
6. The method for removing thiophene sulfides from fuel oil according to claim 1, wherein the concentration of thiophene, benzothiophene, or dibenzothiophene sulfur in the adsorbed simulated gasoline is 0.1-10 mgS/g, preferably 0.1-5 mgS/g.
7. The method for removing thiophenic sulfides from fuel oil according to claim 1, wherein said adsorption-treated simulated gasoline contains 20wt% of cyclohexene or 20wt% of toluene.
8. The method for removing thiophenic sulfides from fuel oil according to claim 1, wherein the adsorbed SiO is2And (3) eluting and regenerating the MTES-APTES-Ag composite aerogel adsorbent by using a solvent, wherein the solvent used for regeneration is cyclohexene, diethyl ether, benzene or toluene.
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