CN101466467A - 排气用吸附材料 - Google Patents
排气用吸附材料 Download PDFInfo
- Publication number
- CN101466467A CN101466467A CNA2007800219905A CN200780021990A CN101466467A CN 101466467 A CN101466467 A CN 101466467A CN A2007800219905 A CNA2007800219905 A CN A2007800219905A CN 200780021990 A CN200780021990 A CN 200780021990A CN 101466467 A CN101466467 A CN 101466467A
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- zsm5
- nitrogen oxides
- hydrocarbons
- zeolite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003463 adsorbent Substances 0.000 title claims abstract description 24
- 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 52
- 239000010457 zeolite Substances 0.000 claims abstract description 43
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000001179 sorption measurement Methods 0.000 claims abstract description 31
- 239000000654 additive Substances 0.000 claims abstract description 25
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 11
- 150000002500 ions Chemical class 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 105
- 239000007789 gas Substances 0.000 abstract description 47
- 229930195733 hydrocarbon Natural products 0.000 abstract description 36
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 36
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052593 corundum Inorganic materials 0.000 abstract description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 4
- 238000005342 ion exchange Methods 0.000 abstract description 3
- 229910052680 mordenite Inorganic materials 0.000 abstract description 3
- 238000000746 purification Methods 0.000 description 29
- 239000000843 powder Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000013076 target substance Substances 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 229910000323 aluminium silicate Inorganic materials 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- NHTMVDHEPJAVLT-UHFFFAOYSA-N Isooctane Chemical compound CC(C)CC(C)(C)C NHTMVDHEPJAVLT-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- JVSWJIKNEAIKJW-UHFFFAOYSA-N dimethyl-hexane Natural products CCCCCC(C)C JVSWJIKNEAIKJW-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
-
- 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
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
- B01D53/9486—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start for storing hydrocarbons
-
- 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
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20738—Iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
- B01D2255/502—Beta zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
- B01D2255/504—ZSM 5 zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/91—NOx-storage component incorporated in the catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/912—HC-storage component incorporated in the catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/502—Carbon monoxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/12—Hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Biomedical Technology (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Toxicology (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
通过将含有Fe-ZSM5的基材、和添加材料混合来制作排气用吸附材料,所述Fe-ZSM5是对Si/Al2O3摩尔比为28即Si的摩尔数∶Al2O3的摩尔数=28∶1的ZSM5进行Fe离子交换而得到的,所述添加材料含有Si/Al2O3摩尔比为250的Y型沸石、Si/Al2O3摩尔比为200的丝光沸石、Si/Al2O3摩尔比为400的β型沸石中的至少一种。这样地得到的排气用吸附材料,能够同时地高效率吸附烃和氮氧化物。
Description
技术领域
本发明涉及吸附从汽车等的发动机排出的排气中所含的一氧化碳(Co)、烃(HC)、氮氧化物(NOx)等的排气用吸附材料的技术。
背景技术
以往人们知道通过将含有铂(Pt)、铑(Rh)等贵金属的催化剂担载于载体上,并使其与排气接触,从而分解排气中所含的一氧化碳、烃、氮氧化物等(以下称为“净化对象物质”),对排气进行净化的排气净化装置。
近年来,汽车的排气限制有进一步强化的倾向,要求进一步提高排气净化装置的排气净化性能。作为提高排气净化性能的方法,可举出:将增大载体表面积、使贵金属粒子微细化(增大贵金属表面积)、使贵金属粒子在载体表面上均匀分散等有效地组合的方法。
特别是从提高汽车燃料利用率的观点考虑,近年的汽车的发动机具有进行在空燃比(A/F)大的稀薄侧的区域中使燃料燃烧的稀燃控制的倾向,整寻求稀燃时的排气中较多地含有的氮氧化物的净化性能优异的排气净化装置。
另外,对于排气净化装置,探求着提高在例如汽车发动机起动时等排气净化装置的温度未充分上升的阶段的排气净化性能。
这是由于在排气净化装置的温度未充分上升的阶段,催化剂的温度低(200℃以下),催化剂活性不充分,因此排气净化装置的排气净化性能降低。
作为结果,在使用以往的排气净化装置的场合,在发动机起动时等所排出的排气中,比通常时(催化剂有活性时)多地含有一氧化碳、烃、氮氧化物等净化对象物质。
作为解决这样的问题的方法,已知在专利文献1(日本特开2003-326137号公报)、专利文献2(日本特开2004-978号公报)、专利文献3(日本特开平7-80315号公报)和专利文献4(日本特表2001-526586号公报)中所记载的技术。
专利文献1~专利文献4中所记载的技术,是通过使用具有吸附一氧化碳、烃、氮氧化物等净化对象物质的性质(以下称为“吸附能力”)的沸石构成担载排气净化装置的催化剂的载体,或在担载排气净化装置的催化剂的载体的表面形成含有沸石的涂层,从而在排气净化装置的温度未充分上升的阶段将净化对象物质暂时地吸附在沸石等上,在排气净化装置的温度充分上升了的时刻,利用催化剂分解净化对象物质的技术。
另外,作为解决上述问题的另一方法,是通过在发动机的排气路径中,在成为排气净化装置的上流侧(接近发动机的一侧)的位置配置在载体上涂布沸石而成的材料(吸附材料),在排气净化装置的温度低的阶段,将净化对象物质暂时地吸附在沸石等上,防止净化对象物质不被排气净化装置分解就排放到外部的方法。
然而,上述专利文献1~专利文献4中所记载的技术和使用吸附材料的技术存在以下问题。
一般地,沸石是泛指在结晶中形成有微细的孔的铝硅酸盐、以及将该铝硅酸盐中的铝原子或硅原子的一部分置换成别的金属原子而成的物质。另外,起因于结晶结构、在结晶中形成的微细孔的尺寸、进行了置换的金属原子的种类等,存在具有分别不同的性质的各种的沸石,对排气中所含的净化对象物质的各个成分(一氧化碳、烃、氮氧化物等)的吸附能力也不同。因此,要求使用适合于净化对象物质的各个成分(一氧化碳、烃、氮氧化物等)的沸石作为吸附材料。
另外,一般地,排气中所含的净化对象物质中,不限于沸石系的吸附材料,对于以往的Pd/CeO2系、Pd/Co3O4系的吸附材料等,烃也具有使用于吸附一氧化碳、氮氧化物的吸附材料中毒(使吸附能力降低)的倾向。
因此,以往,使用于吸附烃的吸附材料和用于吸附一氧化碳、氮氧化物的吸附材料为非一体,在排气路径的上游侧配置用于吸附烃的吸附材料,在其下游侧配置用于吸附一氧化碳、氮氧化物的吸附材料。然而,在采用这样的构成的场合,若将这些吸附材料合并时,则作为整体占有较大的体积,存在小型化不容易的问题。
本发明是鉴于以上的状况,提供能够同时地高效率吸附净化对象物质的各个成分的排气用吸附材料的发明。
发明内容
本发明要解决的课题如以上所述,下面对用于解决该课题的手段进行说明。
即,本发明是一种排气用吸附材料,其是将含有Fe-ZSM5的基材、和添加材料混合而成的,所述添加材料含有Y型沸石、丝光沸石、β型沸石中的至少一种。
另外,本发明所述的排气用吸附材料,是上述添加材料的混合比率为1重量%~20重量%的排气用吸附材料。
另外,本发明中的上述Fe-ZSM5,是对Si/Al2O3摩尔比为28的ZSM5进行Fe离子交换而成的。
ZSM5、Y型沸石、丝光沸石、β型沸石均是沸石的一种。
沸石泛指在结晶中形成有微细孔的铝硅酸盐、以及将该铝硅酸盐中的铝原子或硅原子的一部分置换成别的金属原子而成的物质。
Fe-ZSM5泛指以ZSM5为起始材料,通过对其进行Fe离子交换而得到的物质。
Fe-ZSM5,优选为以Si/Al2O3摩尔比为28(Si的摩尔数:Al2O3的摩尔数=28:1)的ZSM5为起始材料,通过对其进行Fe离子交换而得到的物质。这是因为在以Si的摩尔数少的ZSM5为起始材料的场合,通过Fe离子交换而进入Fe-ZSM5中的Fe的数量增多,吸附能力(特别是对氮氧化物的吸附能力)提高。
添加材料既可以含有Y型沸石、丝光沸石、β型沸石中的一种,也可以含有其中的多种。
当添加材料的混合比率不到1重量%时,对烃的吸附能力降低,因此添加材料的混合比率优选为1重量%以上。
当添加材料的混合比率超过20重量%时,基材的比率降低,对氮氧化物的吸附能力降低,因此添加材料的混合比率优选为20重量%以下。
在本发明中,能够同时地高效率吸附排气中所含的烃和氮氧化物。
附图说明
图1是表示使用本发明的排气用吸附材料的实施例的吸附实验的结果的图。
具体实施方式
以下,对作为本发明的排气用吸附材料的实施方式的实施例1~实施例4、以及作为以往的排气用吸附材料的实施方式的比较例进行说明。
实施例1~实施例4以及比较例按以下步骤进行制造。
首先,作为基材,准备通过对Si/Al2O3摩尔比为28(Si的摩尔数:Al2O3的摩尔数=28:1)的ZSM5进行Fe离子交换而得到的Fe-ZSM5。
另外,作为添加材料,准备Si/Al2O3摩尔比为250的Y型沸石、Si/Al2O3摩尔比为200的丝光沸石、Si/Al2O3摩尔比为400的β型沸石。
接着,通过将这些基材和添加材料适当地混合,来制造与实施例1~实施例4以及比较例相对应的沸石粉末。
与实施例1相对应的沸石粉末,是通过将上述Fe-ZSM5和上述Y型沸石混合而制作。与实施例1相对应的沸石粉末的重量为200g,与实施例1相对应的沸石粉末中的添加材料的混合比率(=添加材料/(基材+添加材料)×100)为1重量%。
与实施例2相对应的沸石粉末,是通过将上述Fe-ZSM5和上述Y型沸石混合而制作。与实施例2相对应的沸石粉末的重量为200g,与实施例2相对应的沸石粉末中的添加材料的混合比率为5重量%。
与实施例3相对应的沸石粉末,是通过将上述Fe-ZSM5和上述丝光沸石混合而制作。与实施例3相对应的沸石粉末的重量为200g,与实施例3相对应的沸石粉末中的添加材料的混合比率为5重量%。
与实施例4相对应的沸石粉末,是通过将上述Fe-ZSM5和上述β型沸石混合而制作。与实施例4相对应的沸石粉末的重量为200g,与实施例4相对应的沸石粉末中的添加材料的混合比率为5重量%。
与比较例相对应的沸石粉末,只由上述Fe-ZSM5形成。与比较例相对应的沸石粉末的重量为200g。
接着,将得到的共5种的沸石粉末分别与硅溶胶以及纯水混合,制造与实施例1~4以及比较例相对应的浆液状的涂敷材料。此时,沸石粉末、硅溶胶和纯水的混合比(重量比)为沸石粉末:硅溶胶:纯水=100:35:90。
接着,将得到的共5种的涂敷材料分别涂布在体积约为1000cc的整体料的表面,通过将这些整体料在120℃干燥2小时,然后在500℃烧成2小时,从而制造出实施例1~实施例4和比较例。
以下,对使用实施例1~实施例4和比较例的吸附实验的实验方法进行说明。
首先,准备搭载有排气量为2400cc的发动机的汽车,在该发动机的排气路径的中途部且催化剂转化器的上游侧(接近发动机的一侧)配置实施例1。
然后,起动该发动机并保持20秒钟。该期间检测从实施例1通过而排出的排气中所含的烃和氮氧化物的浓度。
接着,基于得到的排气中所含的烃和氮氧化物的浓度,算出实施例1的烃和氮氧化物的吸附率(%)。
烃(氮氧化物)的吸附率(%),使用:(A)基于在排气路径的中途部没有配置排气用吸附材料的状态下,在起动发动机后直到经过20秒钟的期间所排出的排气中所含有的除了甲烷以外的烃(氮氧化物)的浓度而算出的烃(氮氧化物)的重量、以及(B)基于在排气路径的中途部配置了实施例1的状态下,在起动发动机后直到经过20秒种的期间所排出的排气中所含有的除了甲烷以外的烃(氮氧化物)的浓度而算出的烃(氮氧化物)的重量,采用计算式{(A-B)/A}×100算出。
对实施例2~实施例4和比较例也进行与上述同样的实验,算出实施例2~实施例4和比较例的烃和氮氧化物的吸附率(%)。
以下,用图1对上述吸附实验的结果进行说明。
实施例1~实施例4和比较例的氮氧化物的吸附率均为100%,实施例1~实施例4和比较例,针对氮氧化物显示出优异的吸附性。
比较例中的氮氧化物的吸附率为100%,由此表明作为基材的Fe-ZSM5有助于获得针对氮氧化物的优异的吸附性。另外,实施例1~实施例4中的氮氧化物的吸附率为100%,由此显示出氮氧化物的吸附率不会由于将本实施例所涉及的添加材料和基材混合而降低。
比较例的烃的吸附率为96.8%,而实施例1~实施例4的烃的吸附率分别为98.7%、99.2%、99.0%、99.0%,实施例1~实施例4与比较例相比,针对烃显示出更优异的吸附性。
实施例1~实施例4与比较例的不同是有无添加材料,由此表明通过将本实施例所涉及的添加材料(Y型沸石、丝光沸石、β型沸石中的至少一种)与基材(Fe-ZSM5)混合,对烃的吸附性提高。
另外,使用气相色谱仪分析上述实验时排气中的烃的种类的结果,比较例中的排气中含有甲烷、乙烷和异辛烷,而实施例1~实施例4中的排气中含有甲烷和乙烷但不含有异辛烷。因此表明实施例1~实施例4针对分子量比乙烷大的烃显示出100%的吸附率。
如以上所述,实施例1~实施例4,是将含有Fe-ZSM5的基材、和含有Y型沸石、丝光沸石、β型沸石中的至少一种沸石的添加材料混合而成的排气用吸附材料。
通过这样地构成,能够同时地高效率吸附排气中所含的烃和氮氧化物。
特别是能够防止发动机起动时等的催化剂转化器的温度没有充分上升的阶段的烃和氮氧化物的向外部的放出,有助于排气的净化。
另外,不需要使用于吸附烃的吸附材料和用于吸附氮氧化物的吸附材料为非一体,因此也有助于排气用吸附材料的小型化。
另外,实施例1~实施例4,是使添加材料的混合比率为1重量%~20重量%的例子。
通过这样地构成,可充分地确保对氮氧化物的吸附能力,同时能够提高对烃的吸附能力。
特别是有助于从进行稀燃控制的发动机排出的排气的净化。
另外,实施例1~实施例4中的上述Fe-ZSM5,是对Si/Al2O3摩尔比为28的ZSM5进行Fe-离子交换而成的。
通过这样地构成,Fe-ZSM5中所含的Fe增多,对烃和氮氧化物的吸附能力更加提高。
产业上的利用可能性
本发明,不限于从汽车等的发动机排出的排气,可广泛地适用于吸附气体中所含的烃(HC)和氮氧化物(NOx)从而从该气体中分离出来的用途。
Claims (3)
1、一种排气用吸附材料,其特征在于,是将含有Fe-ZSM5的基材、和添加材料混合而成的,所述添加材料含有Y型沸石、丝光沸石、β型沸石中的至少一种。
2、根据权利要求1所述的排气用吸附材料,其特征在于,所述添加材料的混合比率为1重量%~20重量%。
3、根据权利要求1或2所述的排气用吸附材料,其特征在于,所述Fe-ZSM5是对Si/Al2O3摩尔比为28的ZSM5进行Fe离子交换而成的。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006163787A JP2007330866A (ja) | 2006-06-13 | 2006-06-13 | 排ガス用吸着材 |
JP163787/2006 | 2006-06-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN101466467A true CN101466467A (zh) | 2009-06-24 |
Family
ID=38831621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA2007800219905A Pending CN101466467A (zh) | 2006-06-13 | 2007-05-30 | 排气用吸附材料 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090197761A1 (zh) |
EP (1) | EP2039423A4 (zh) |
JP (1) | JP2007330866A (zh) |
KR (1) | KR20090031896A (zh) |
CN (1) | CN101466467A (zh) |
WO (1) | WO2007145104A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102274671A (zh) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | 脱除co制备草酸酯排放尾气中氮氧化物的方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102872799B (zh) * | 2012-10-24 | 2015-01-14 | 涿鹿恩泽催化材料有限公司 | 一种吸附和分解室内有害气体的吸附剂的制备方法 |
GB201716715D0 (en) * | 2017-10-12 | 2017-11-29 | Krajete GmbH | Method for reducing the nitrogen oxide(s) and/or CO content in a combustion and/or exhaust gas |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3702886A (en) * | 1969-10-10 | 1972-11-14 | Mobil Oil Corp | Crystalline zeolite zsm-5 and method of preparing the same |
JPH0615016B2 (ja) * | 1988-09-09 | 1994-03-02 | トヨタ自動車株式会社 | 自動車排気ガス浄化装置 |
JPH04367740A (ja) * | 1991-06-13 | 1992-12-21 | Tosoh Corp | 窒素酸化物還元除去用触媒及び還元除去方法 |
JPH06198192A (ja) * | 1992-12-28 | 1994-07-19 | Tosoh Corp | 排ガス浄化触媒 |
JP3129366B2 (ja) | 1993-09-14 | 2001-01-29 | 三菱重工業株式会社 | 脱硝触媒及び排気ガスの処理方法 |
US5676912A (en) * | 1995-02-22 | 1997-10-14 | Mobil Oil Corporation | Process for exhaust gas NOx, CO, and hydrocarbon removal |
JPH0999207A (ja) * | 1995-10-04 | 1997-04-15 | Ngk Insulators Ltd | 耐水熱性分子篩及びそれを用いた炭化水素吸着材 |
JP3835436B2 (ja) | 1997-04-23 | 2006-10-18 | トヨタ自動車株式会社 | 排ガス浄化方法及び排ガス浄化用触媒 |
JP3800200B2 (ja) | 1997-04-23 | 2006-07-26 | トヨタ自動車株式会社 | 排ガス浄化方法及び排ガス浄化用触媒 |
US6093378A (en) | 1997-05-07 | 2000-07-25 | Engelhard Corporation | Four-way diesel exhaust catalyst and method of use |
JP3417309B2 (ja) * | 1997-10-28 | 2003-06-16 | トヨタ自動車株式会社 | 炭化水素吸着材 |
JP4703818B2 (ja) * | 2000-06-20 | 2011-06-15 | 株式会社アイシーティー | 排気ガス浄化用触媒および排気ガス浄化方法 |
JP4118077B2 (ja) * | 2002-04-15 | 2008-07-16 | バブコック日立株式会社 | 排ガスの浄化方法 |
JP2004190549A (ja) * | 2002-12-10 | 2004-07-08 | Mitsubishi Automob Eng Co Ltd | 内燃機関の排気浄化装置 |
-
2006
- 2006-06-13 JP JP2006163787A patent/JP2007330866A/ja active Pending
-
2007
- 2007-05-30 KR KR1020097000546A patent/KR20090031896A/ko not_active Ceased
- 2007-05-30 CN CNA2007800219905A patent/CN101466467A/zh active Pending
- 2007-05-30 EP EP07744754A patent/EP2039423A4/en not_active Withdrawn
- 2007-05-30 WO PCT/JP2007/061409 patent/WO2007145104A1/ja active Application Filing
- 2007-05-30 US US12/304,124 patent/US20090197761A1/en not_active Abandoned
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102274671A (zh) * | 2010-06-11 | 2011-12-14 | 中国石油化工股份有限公司 | 脱除co制备草酸酯排放尾气中氮氧化物的方法 |
CN102274671B (zh) * | 2010-06-11 | 2016-01-13 | 中国石油化工股份有限公司 | 脱除co制备草酸酯排放尾气中氮氧化物的方法 |
Also Published As
Publication number | Publication date |
---|---|
EP2039423A4 (en) | 2010-08-25 |
WO2007145104A1 (ja) | 2007-12-21 |
EP2039423A1 (en) | 2009-03-25 |
KR20090031896A (ko) | 2009-03-30 |
US20090197761A1 (en) | 2009-08-06 |
JP2007330866A (ja) | 2007-12-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2620425C2 (ru) | УЛУЧШЕННАЯ ЛОВУШКА NOx | |
KR102289646B1 (ko) | NOx 저장 촉매 및 SCR 시스템을 위한 배기 내 전기 요소 | |
KR101841905B1 (ko) | 디젤 엔진의 배기 가스로부터 질소 산화물을 제거하기 위한 촉매 컨버터 | |
CN103635249B (zh) | 用于内燃机的催化基体和排气系统 | |
RU2674020C2 (ru) | СОСТАВ ЛОВУШКИ ДЛЯ NOx | |
CN112916037B (zh) | 包含具有特定粒度分布的金属氧化物载体粒子的催化剂组合物 | |
JP5141063B2 (ja) | 排ガス浄化装置 | |
US9138736B2 (en) | Exhaust purifying catalyst | |
EP1166854A1 (en) | Exhaust gas purifing catalyst and method for purifying exhaust gas | |
JP3854134B2 (ja) | 内燃機関用排気ガス浄化装置 | |
RU2019105496A (ru) | Катализатор на основе оксида церия, импрегнированного рутением | |
JP2004351243A (ja) | 排気ガス浄化システム | |
JP3282344B2 (ja) | 排気ガス浄化装置 | |
CN101466467A (zh) | 排气用吸附材料 | |
WO2024190162A1 (ja) | 排ガス浄化触媒装置及び排ガス浄化触媒システム | |
JP2006167540A (ja) | 炭化水素吸着燃焼触媒 | |
JP2005007260A (ja) | 排ガス浄化装置 | |
JP2005186002A (ja) | ディーゼルエンジン用排ガス浄化装置 | |
JP4145019B2 (ja) | 排気ガス浄化装置 | |
JP2008229546A (ja) | 排ガス浄化用触媒及びその製造方法 | |
JP2002239346A (ja) | 排気ガス浄化装置および製造方法 | |
JP2003135970A (ja) | 排気ガス浄化用触媒 | |
JPH10141047A (ja) | 内燃機関の排気浄化用触媒装置 | |
WO2019132612A1 (ko) | 탄화수소 제거 시스템 | |
JP2004322022A (ja) | 排ガス浄化用触媒 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090624 |