CN103215068A - 一种生物质热解油的改性方法 - Google Patents
一种生物质热解油的改性方法 Download PDFInfo
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- CN103215068A CN103215068A CN2013101634495A CN201310163449A CN103215068A CN 103215068 A CN103215068 A CN 103215068A CN 2013101634495 A CN2013101634495 A CN 2013101634495A CN 201310163449 A CN201310163449 A CN 201310163449A CN 103215068 A CN103215068 A CN 103215068A
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- pyrolysis oil
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 125
- 238000002715 modification method Methods 0.000 title abstract 3
- 239000003054 catalyst Substances 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 238000004523 catalytic cracking Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000004048 modification Effects 0.000 claims abstract description 21
- 238000012986 modification Methods 0.000 claims abstract description 21
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 18
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- 230000032683 aging Effects 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 7
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002808 molecular sieve Substances 0.000 claims abstract 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 claims abstract description 7
- 239000010457 zeolite Substances 0.000 claims abstract description 7
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- 238000000034 method Methods 0.000 claims description 45
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 12
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- 230000009514 concussion Effects 0.000 claims description 7
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 150000002500 ions Chemical class 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- -1 Soxylat A 25-7 Chemical compound 0.000 claims description 2
- 238000005352 clarification Methods 0.000 claims description 2
- 229910001410 inorganic ion Inorganic materials 0.000 claims description 2
- 230000018044 dehydration Effects 0.000 abstract description 7
- 238000006297 dehydration reaction Methods 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 238000005886 esterification reaction Methods 0.000 description 9
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 238000005984 hydrogenation reaction Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 4
- WETWJCDKMRHUPV-UHFFFAOYSA-N acetyl chloride Chemical compound CC(Cl)=O WETWJCDKMRHUPV-UHFFFAOYSA-N 0.000 description 4
- 239000012346 acetyl chloride Substances 0.000 description 4
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- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
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- 238000006266 etherification reaction Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 239000003345 natural gas Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004227 thermal cracking Methods 0.000 description 2
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 208000034189 Sclerosis Diseases 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 150000002894 organic compounds Chemical class 0.000 description 1
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- 239000004449 solid propellant Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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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
- C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
- C10G3/42—Catalytic treatment
- C10G3/44—Catalytic treatment characterised by the catalyst used
- C10G3/48—Catalytic treatment characterised by the catalyst used further characterised by the catalyst support
- C10G3/49—Catalytic treatment characterised by the catalyst used further characterised by the catalyst support containing crystalline aluminosilicates, e.g. molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/04—Breaking emulsions
- B01D17/047—Breaking emulsions with separation aids
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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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/085—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
- B01J29/088—Y-type faujasite
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/405—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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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
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
- C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
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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
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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- B01J2229/30—After treatment, characterised by the means used
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2229/42—Addition of matrix or binder particles
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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
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1011—Biomass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
本发明提供一种生物质热解油的改性方法,具体包括以下步骤:第一步破乳分层除水:向生物质热解油中加入无机盐离子和有机破乳剂,其中无机盐与生物质热解油的质量比为1:2000~1:800,有机破乳剂与生物质热解油的质量比为1:4000~1:1000,充分混合后静置,取上层生物质热解油;第二步对生物质热解油进行催化裂化改性:采用改性催化剂:1)改性催化剂:在500℃~800℃条件下,100%水蒸汽对沸石分子筛负载白土催化剂老化处理2~8h;2)取老化后的催化剂装入反应器内,将生物质热解油注入到装有催化剂的反应器中,剂油比为1:3~16;在质量空速6~15h-1、反应温度380℃~700℃、反应压力0.1Mpa~0.8Mpa的条件下进行生物质热解油催化裂化改性。
Description
技术领域
本发明提供一种生物质热解油的改性方法。具体地讲是将生物质热解油经过脱水后直接催化裂化生产燃料油的技术。
背景技术
以石油、煤炭、天然气为主的化石能源日益枯竭。生物质能源是仅次于石油、煤炭、天然气的第四大能源,具有来源广泛、安全、可再生循环、零二氧化碳排放的优点。生物质来源主要包括农作物、树木、其他植物及秸秆等,生物质经过一系列的转换技术可以生产出不同类型能源燃料,如生物质碳化可以生产优质的固体燃料、生物质气化可以生产气体燃料、生物质液化可以获得液体燃料等。生物质直接转化为液体燃料技术可将低品质、低热值的生物质能转化为高品质、高热值、易于储存和运输的液体燃料。生物质经热解液化获得的生物质热解油经过改性精制后可直接作为石化燃料的替代产品。
生物质热解技术是在无氧条件下将生物质快速加热至高温,利用热能切断生物质大分子的化学键使之转变为低分子物质的过程。该技术自上个世纪80年代至今发展迅速,已经开发出多种生物质热解技术工艺。如美国佐治亚理工学院的夹带流反应器(entrained flow reactor)和太阳能研究所(SERI)的漩涡反应器(vortex reactor) 、加拿大DynaMotive Energy Systems的流化床反应器(fluidized bed reactor)和ENSYN的循环流化床反应器(upflow circulatingfluidizedbed reactor)、荷兰Twente大学和BTG的旋转锥反应器(rotatingcone reactor)等。其中荷兰BTG和加拿大DynaMotive Energy Systems已分别建成了日处理30t棕榈壳和100t木屑的热解液化工业示范装置,生物质热解油产油率均在60 %(质量百分含量)以上。但是生物质的3种主要组分纤维素、半纤维素和木质素,在热裂解过程中受热裂解不完全同步,热解过程也未达到热力学平衡,产物组成非常复杂。其中水是生物质热解油中含量最多的单种组分,一般情况下生物质热解油的含水量达30%~40%(质量百分含量),主要来源于原料中的水分和热裂解过程生物质发生缩聚反应所生成的水分。其次生物质热解油包含成百上千种有机化合物,如酸、醇、醚、酯、醛、酮、酚等,导致生物质热解油含氧量高、酸值高、粘度高、热值低,而且其物理化学性质非常不稳定。含氧量高导致生物质热解油随着存储时间变长粘度增加;含有的酚类物质随温度升高容易氧化,导致热解油结块硬化;生物质热解油的酸值高,在存储和使用过程中极易腐蚀设备。因此生物质热解油不能直接作为燃料广泛使用,需要经过改性精制,提高生物质热解油品质,满足液体燃料的质量要求。
CN1376766 介绍了一种直接加氢改性精制生物质热解油的方法,具体方法是在350℃以上、10MPa的条件下用CoMo加氢催化剂,直接加氢脱除生物质热解油中的氧,得到改性热解油。虽然加氢是脱氧最有效的方法,但是生物质热解油中含氧量达40%以上,完全脱除需消耗大量的氢气,而且加氢条件苛刻,设备工艺复杂,成本昂贵,工业生产中不具有可行性。
CN101381611介绍了一种酯化醚化改性生物质热解油的方法,具体方法是向未经除水的生物质热解油中加入低碳醇,在90℃~110℃条件下酯化或醚化反应5~8小时,再经过80℃~130℃减压蒸馏除去水分。该专利描述的生物质热解油含水量20%~30%,大量水的存在无疑会加大酯化反应的难度;酯化反应温度和蒸馏温度都高于80℃,而生物质热解油在高于80℃时,老化速度明显加快,会析出大量固体颗粒,稳定性变差。
CN101899334A介绍了一种对生物质热解油先除水,再进行酯化反应,达到生物质热解油除水除酸改性的目的。具体方法是向生物质热解油中加入异辛醇与水形成共沸物,在0.02Mpa、80℃水浴减压蒸馏分出大部分水分,再向脱水后的生物质热解油中加入乙酰氯,通过乙酰氯的水解除去剩余水分;完全除水后的生物质热解油与乙醇进行酯化反应,酯化反应生成的少量水经加入的无水硫酸镁脱除,最终达到生物质热解油的脱水除酸的效果。乙酰氯和生物质热解油中的水发生反应达到除水目的,脱水的同时也消耗了乙酰氯,无疑大大增加成本;酯化反应后加入无水硫酸镁继续脱水,需要重新分离硫酸镁,增加工艺难度同时必然增加了生物质热解油改性过程中的损耗。
现有生物质热解油改性精制的方法大致如下:第一,通过精馏,包含减压精馏、反应精馏、萃取精馏除去生物质热解油中的水分;第二,脱水后的生物质热解油经过催化酯化降低酸度和粘度;第三,对生物质热解油直接加氢改性。在这些工艺过程中,加热精馏时极易使生物质热解油粘度变大甚至结块变质。同时由于生物质热解油含有较多低沸点组分,精馏过程将造成这些低沸点组分和一些有机共沸物的损耗。而催化加氢的设备一般较复杂,成本高,在生产过程中容易发生反应器堵塞和催化剂失活。
发明内容
本发明的目的在于开发一种高效的生物质热解油改性方法,提高改性后生物质热解油的物理化学品质,以克服现有技术的不足。
本发明的技术方案:本发明的生物质热解油的改性方法具体包括以下步骤:
第一步破乳分层除水:向生物质热解油中加入无机盐离子和有机破乳剂,其中无机盐与生物质热解油的质量比为1:2000~1:800,有机破乳剂与生物质热解油的质量比为1:4000~1:1000,经震荡或者搅拌,充分混合后静置,待下层水溶液变得澄清且油水界面清晰时,分出上层生物质热解油和下层水溶液,取上层生物质热解油;
第二步对生物质热解油进行催化裂化改性:催化裂化反应采用常规催化裂化反应器,催化裂化反应的改性催化剂采用沸石分子筛负载白土制备的改性催化剂:
1)改性催化剂:在500℃~800℃条件下,100%水蒸汽对沸石分子筛负载白土催化剂老化处理2~8h;
2)取一定量老化后的催化剂装入反应器内,用柱塞泵将生物质热解油注入到装有催化剂的反应器中,剂油比为1:3~16;在质量空速6~15h-1、反应温度380℃~700℃、反应压力0.1Mpa~0.8Mpa的条件下进行生物质热解油催化裂化改性。
所述的第二步的步骤1)采用沸石分子筛负载白土制备的改性催化剂包含REY/白土、REUSY/白土、高硅REUSY/白土、LREHY/白土、ZSM-5/白土;成型催化剂经1mol/L的NH4NO3溶液离子交换后, 150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
所述的破乳分层除水所用的无机盐为含有离子Ca2+、Na+、K+、Al3+、Fe2+、NH4 +、Cl-、SO4 2-、NO3 -的无机盐。
所述的破乳分层除水所用的有机破乳剂为聚氧丙烯醚、聚氧乙烯醚、丙二醇、正丙醇中的一种。
优选地,所述的破乳分层除水所用的无机盐为含有离子Na+、NH4 +、Cl-、SO4 2-的无机盐。
优选地,第一步无机盐与生物质热解油的质量比为1:1500~1:1000,有机破乳剂与生物质热解油的质量比为1:2000~1:1300。
优选地,所述的第二步的步骤1)改性催化剂老化处理前,催化剂经1mol/L的NH4NO3溶液离子交换后,再在150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
优选地,所述的第一步破乳分层除水时,经震荡或者搅拌时间为3~60分钟,充分混合后静置20±5分钟。
本发明的方法具有以下优点:
1.由于采用了破乳剂与无机盐进行破乳分层除水,可在常温下进行油水分离,达到生物质热解油除水效果。破乳剂可以加速油水分离;无机盐破坏乳状液双电层,内向水析出速率加快,同时改变了乳化剂的亲水亲油平衡,增加油水分离效果;在常温下进行油水分离,可以避免生物质热解油老化。
2.经本发明方法破乳除水,油水分离可脱除原生物质热解油中大部分水,得含水量不超过8%(质量比)的上层生物质热解油。少量水的存在可以降低热解油的粘度,保持生物质热解油良好流动性,使催化裂化反应进料容易。
3. 本发明方法催化裂化反应时间极短,可在生物质热解油老化前对其进行裂化生成稳定的短链烃类和裂化气。
4.对催化裂化催化剂进行改性,特别是离子交换处理,增加了催化剂酸性,提高催化剂脱氧选择性,对生物质热解油脱氧更有效。
5.对催化裂化催化剂进行改性,催化剂具有高活性及高脱氧选择性,可以将生物质热解油中的氧以H2O、CO或CO2形式除去,而不需要消耗还原性气体。
6.该工艺简单,设备低廉,成本低,容易实现大规模工业化连续生产。
具体实施方式
下面以具体实施例来阐述本发明的技术方案:
实施例中,生物质热解油水分采用GB11146卡尔费休水分滴定法测定;热解油酸度采用GB/T264-1991石油产品酸值测定法测定;热解油粘度采用毛细管运动粘度计测定;热解油低位热值采用GB/T18856水煤浆发热量测定方法测定;热解油中的C、H、O采用元素分析仪测定。
实施例1
取1000g生物质热解油置于1500ml的三口烧瓶中,在搅拌的过程中缓慢加入0.5g氯化钠和0.25g聚氧丙烯醚。继续搅拌5分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅰ和下层水溶液。
将成型的高硅REUSY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在150℃的条件下焙烧3小时。焙烧过的催化剂再经600℃、100%水蒸汽老化3小时。称取200g该催化剂装入固定流化床内,在质量空速6h-1、剂油比为8、反应温度450℃、反应压力0.2Mpa的条件下进行催化裂化反应。对裂化产物分析结果如表1。
表1生物质热解油Ⅰ催化裂化改性结果(P=1atm,T=28℃)
实施例2
取1000g生物质热解油置于1500ml的三口烧瓶中,在搅拌的过程中缓慢加入1g硫酸钠和1g丙二醇。继续搅拌5分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅱ和下层水溶液。
将成型的REY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在300℃的条件下焙烧4小时。焙烧过的催化剂再经800℃、100%水蒸汽老化5小时。称取200g该催化剂装入固定流化床内,以质量空速10h-1、剂油比为8、反应温度550℃、反应压力0.3Mpa的条件下进行催化裂化反应。对产物分析结果如表2。
表2生物质热解油Ⅱ催化裂化改性结果(P=1atm,T=28℃)
实施例3
取1000g生物质热解油置于1500ml的三口烧瓶中,在搅拌的过程中缓慢加入0.6g氯化钠和0.3g聚氧丙烯醚。继续搅拌5分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅲ和下层水溶液。
将成型的高硅REUSY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在150℃的条件下焙烧3小时。焙烧过的催化剂再经600℃、100%水蒸汽老化3小时。称取200g该催化剂装入固定流化床内,在质量空速6h-1、剂油比为8、反应温度450℃、反应压力0.2Mpa的条件下进行催化裂化反应。对裂化产物分析结果如表3。
表3生物质热解油Ⅲ催化裂化改性结果(P=1atm,T=28℃)
实施例4
取1000g生物质热解油置于1500ml的三口烧瓶中,在震荡的过程中缓慢加入0.5g硫酸铵和0.5g聚氧乙烯醚。继续震荡8分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅳ和下层水溶液。
将成型的REUSY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在200℃的条件下焙烧2小时。焙烧过的催化剂再经700℃、100%水蒸汽老化6小时。称取200g该催化剂装入提升管反应器内,以质量空速15h-1、剂油比为3、反应温度550℃、反应压力0.3Mpa的条件下进行催化裂化反应。对产物分析结果如表4。
表4生物质热解油Ⅳ催化裂化改性结果(P=1atm,T=28℃)
实施例5
取1000g生物质热解油置于1500ml的三口烧瓶中,在搅拌的过程中缓慢加入0.5g硫酸钠和0.7g丙二醇。继续搅拌5分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅴ和下层水溶液。
将成型的REY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在300℃的条件下焙烧4小时。焙烧过的催化剂再经800℃、100%水蒸汽老化5小时。称取200g该催化剂装入固定流化床内,以质量空速10h-1、剂油比为8、反应温度550℃、反应压力0.3Mpa的条件下进行催化裂化反应。对产物分析结果如表5。
表5生物质热解油Ⅴ催化裂化改性结果(P=1atm,T=28℃)
实施例6
取1000g生物质热解油置于1500ml的三口烧瓶中,在搅拌的过程中缓慢加入1.2g氯化钙和0.3g正丙醇。继续搅拌5分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅵ和下层水溶液。
将成型的LREHY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在200℃的条件下焙烧2小时。焙烧过的催化剂再经500℃、100%水蒸汽老化8小时。称取200g该催化剂装入固定流化床内,以质量空速15h-1、剂油比为12、反应温度600℃、反应压力0.3Mpa的条件下进行催化裂化反应。对产物分析结果如表6。
表6生物质热解油Ⅵ催化裂化改性结果(P=1atm,T=28℃)
实施例7
取1000g生物质热解油置于1500ml的三口烧瓶中,在震荡的过程中缓慢加入0.8g氯化钠和0.4g聚氧乙烯醚。继续震荡8分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅶ和下层水溶液。
将成型的高硅REUSY/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在150℃的条件下焙烧3小时。焙烧过的催化剂再经600℃、100%水蒸汽老化3小时。称取200g该催化剂装入提升管反应器内,以质量空速12h-1、剂油比为16、反应温度650℃、反应压力0.5Mpa的条件下进行催化裂化反应。对产物分析结果如表7。
表7生物质热解油Ⅶ催化裂化改性结果(P=1atm,T=28℃)
实施例8
取1000g生物质热解油置于1500ml的三口烧瓶中,在震荡的过程中缓慢加入0.8g氯化钠和0.6g聚氧丙烯醚。继续震荡8分钟,生物质热解油与加入的破乳剂充分混合后,将混合液转入分液漏斗中静置20分钟。此时下层水溶液变的清澈且水油界面清晰,分出上层生物质热解油Ⅷ和下层水溶液。
将成型的ZSM-5/白土催化剂放入80℃、1mol/L的NH4NO3溶液中浸泡6小时,浸泡后的催化剂经干燥后在150℃的条件下焙烧3小时。焙烧过的催化剂再经500℃、100%水蒸汽老化2小时。称取200g该催化剂装入固定流化床内,以质量空速12h-1、剂油比为16、反应温度650℃、反应压力0.5Mpa的条件下进行催化裂化反应。对产物分析结果如表8。
表8生物质热解油Ⅷ催化裂化改性结果(P=1atm,T=28℃)
1、从实施例中可以得出,在本发明所给出的范围内,随着无机盐、有机破乳剂与生物质热解油的质量比增大,生物质热解油的脱水效果更明显。这是因为无机盐质量增加可以破坏油水双电层,提高水相极性,增加油水分离效果;有机破乳剂质量增加可以缩短油水分离时间。
2、成型的催化剂由于其酸中心少,分布不均匀导致其脱氧选择性低且容易失活。经1mol/L的NH4NO3溶液离子交换后,明显增加了催化剂酸中心,并且均匀分布于催化剂,因此可以提高催化剂脱氧选择性。
Claims (10)
1.一种生物质热解油的改性方法,
第一步破乳分层除水:向生物质热解油中加入无机盐离子和有机破乳剂,其中无机盐与生物质热解油的质量比为1:2000~1:800,有机破乳剂与生物质热解油的质量比为1:4000~1:1000,经震荡或者搅拌,充分混合后静置,待下层水溶液变得澄清且油水界面清晰时,分出上层生物质热解油和下层水溶液,取上层生物质热解油;
第二步对生物质热解油进行催化裂化改性:催化裂化反应采用常规催化裂化反应器,催化裂化反应的改性催化剂采用沸石分子筛负载白土制备的改性催化剂:
1)改性催化剂:在500℃~800℃条件下,100%水蒸汽对沸石分子筛负载白土催化剂老化处理2~8h;
2)取一定量老化后的催化剂装入反应器内,用柱塞泵将生物质热解油注入到装有催化剂的反应器中,剂油比为1:3~16;在质量空速6~15h-1、反应温度380℃~700℃、反应压力0.1Mpa~0.8Mpa的条件下进行生物质热解油催化裂化改性。
2.根据权利要求1所述的生物质热解油的改性方法,其特征在于:第二步的步骤1)采用沸石分子筛负载白土制备的改性催化剂包含REY/白土、REUSY/白土、高硅REUSY/白土、LREHY/白土、ZSM-5/白土;成型催化剂经1mol/L的NH4NO3溶液离子交换后,150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
3.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:破乳分层除水所用的无机盐为含有离子Ca2+、Na+、K+、Al3+、Fe2+、NH4 +、Cl-、SO4 2-、NO3 -的无机盐。
4.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:破乳分层除水所用的有机破乳剂为聚氧丙烯醚、聚氧乙烯醚、丙二醇、正丙醇中的一种。
5.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:破乳分层除水所用的无机盐为含有离子Na+、NH4 +、Cl-、SO4 2-的无机盐。
6.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:第一步无机盐与生物质热解油的质量比为1:1500~1:1000,有机破乳剂与生物质热解油的质量比为1:2000~1:1300。
7.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:第二步的步骤1)改性催化剂老化处理前,催化剂经1mol/L的NH4NO3溶液离子交换后,再在150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
8.根据权利要求3所述的生物质热解油的改性方法,其特征在于:第二步的步骤1)改性催化剂老化处理前,催化剂经1mol/L的NH4NO3溶液离子交换后,再在150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
9.根据权利要求4所述的生物质热解油的改性方法,其特征在于:第二步的步骤1)改性催化剂老化处理前,催化剂经1mol/L的NH4NO3溶液离子交换后,再在150℃~300℃焙烧2~4小时,得到脱氧选择性强的改性催化剂。
10.根据权利要求1或2所述的生物质热解油的改性方法,其特征在于:第一步破乳分层除水时,经震荡或者搅拌时间为3~60分钟,充分混合后静置20±5分钟。
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