CN106555641A - 废气后处理系统 - Google Patents

废气后处理系统 Download PDF

Info

Publication number
CN106555641A
CN106555641A CN201510882005.6A CN201510882005A CN106555641A CN 106555641 A CN106555641 A CN 106555641A CN 201510882005 A CN201510882005 A CN 201510882005A CN 106555641 A CN106555641 A CN 106555641A
Authority
CN
China
Prior art keywords
processing system
scr
diesel particulate
particulate filter
gas post
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.)
Granted
Application number
CN201510882005.6A
Other languages
English (en)
Other versions
CN106555641B (zh
Inventor
郑镇宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Motor Co
Original Assignee
Hyundai Motor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hyundai Motor Co filed Critical Hyundai Motor Co
Publication of CN106555641A publication Critical patent/CN106555641A/zh
Application granted granted Critical
Publication of CN106555641B publication Critical patent/CN106555641B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/16—Selection of particular materials
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0835—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
    • 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
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • 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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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
    • F01N3/18—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 characterised by methods of operation; Control
    • F01N3/20—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 characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • 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
    • F01N3/24—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 characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2067—Urea
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/104—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2063—Lanthanum
    • 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
    • B01D2255/20707—Titanium
    • 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
    • B01D2255/20723—Vanadium
    • 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
    • B01D2255/2073—Manganese
    • 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
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • 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
    • B01D2255/20776—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—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
    • B01D2255/904—Multiple catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/915—Catalyst supported on particulate filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
    • 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
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
    • F01N2370/04—Zeolitic material
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

本发明涉及一种废气后处理系统，其包括配置以氧化包括在废气中的物质的氧化催化剂；配置以收集包括在废气中的颗粒物，并且置于氧化催化剂之后的柴油颗粒过滤器；配置以注入还原剂，并且置于柴油颗粒过滤器之后的定量给料模块；以及配置以使用包括在废气中的还原剂去除氮氧化物，并且置于定量给料模块之后的选择性催化还原。所述柴油颗粒过滤器包括由La1-xAgxMnO3(其中0<x<1)表示的催化成分。

Description

废气后处理系统
相关申请的引用
本申请要求于2015年9月30日向韩国知识产权局提交的第10-2015-0137908号韩国专利申请的优先权的权益，其全部内容通过引证结合于此。
技术领域
本公开涉及废气后处理系统(exhaust gas post-processing system)，并且更具体地，涉及能够物理化学地减少包括在废气中的有害物质的废气后处理系统。
背景技术
通常，装备用于内燃机的后处理系统以去除发动机生成的一氧化碳、烃、颗粒物，和氮氧化物(nitrogen oxide)。
该后处理系统可以包括柴油氧化催化剂(DOC)、柴油颗粒过滤器(DPF)、还原剂注入装置以及选择性催化还原(选择性催化还原法，SCR)。
柴油氧化催化剂用于将包括在废气中的一氧化碳或烃氧化，并使用氧化热燃烧一些颗粒物以减少颗粒物的量。
柴油颗粒过滤器用于过滤包括在废气中的颗粒物并将收集的颗粒物在预定的温度下燃烧以去除颗粒物。
还原剂注入装置用于将还原剂注入废气，并且选择性催化还原则使用包括在废气中的还原剂以氧化/还原氮氧化物从而将氮氧化物去除为氮气和水。
已经研究了使用用于包括柴油氧化催化剂或柴油颗粒催化剂的应用的贵金属组分的方法。这些应用包括氧化并去除一氧化碳或烃，以及氧化一氧化氮以生成二氧化氮至其后级(后段，later stage)。这些应用可以改善用于氮氧化物的选择性催化还原的吸留(occlusion)性能并改善其效率。
在本背景部分中公开的以上信息仅是为了增强对本公开背景的理解，并且因此，可能包含尚未形成由本国的本领域普通技术人员已知晓的现有技术的信息。
发明内容
本公开已经致力于提供，通过将二氧化氮供应至氧化催化剂和柴油颗粒过滤器的后级，而具有改善选择性催化还原性能的优点的废气后处理系统。
本发明的示例性实施方式提供的废气后处理系统包括，配置以氧化包括在废气中的物质的氧化催化剂；配置以收集包括在废气中的颗粒物，并且置于氧化催化剂之后的柴油颗粒过滤器；配置以注入还原剂，并且置于柴油颗粒过滤器之后的定量给料模块(定量配给模块，dosing module)；以及配置以使用包括在废气中的还原剂去除氮氧化物，并且置于定量给料模块之后的选择性催化还原(选择性催化还原模块)。所述柴油颗粒过滤器包括由La1-xAgxMnO3(其中0<x<1)表示的催化组分。
所述柴油颗粒过滤器可以包括由La1-xAgxMnO3(其中0.2≤x≤0.8)表示的催化剂组分。
所述氧化催化剂可以包括由铂和钯组成的催化剂组分。
所述选择性催化还原可以包括由选自V2O5、WO3、Cu和Fe中的至少一种组成的催化剂组分。
所述选择性催化还原可以包括V2O5-WO3/TiO2、Cu-沸石，或Fe-沸石。
所述还原剂可以包括尿素。
根据本发明的实施方式，所述废气后处理系统使用包括在所述柴油颗粒过滤器中的催化组分以将一氧化氮有效地转化为二氧化氮，从而最大化后级的选择性催化还原的性能。
附图说明
图1是根据本发明示例性实施方式的废气后处理系统的示意图。
图2是示出实施例1至4和比较例1中的反应温度以及柴油颗粒过滤器的一氧化氮转化的图表。
图3是示出根据实施例1至3的废气后处理系统中氮氧化物转化的图表。
具体实施方式
参照附图，根据以下实施方式的描述，本发明构思及其实现方法的各种优点和特征将变得显而易见。然而，本发明构思并不限于在本文中阐述的实施方式，而是可以许多不同的形式实现。可提供本实施方式从而完成本发明的公开，并将本发明的范围完整地传达至本领域技术人员，并且因此将本发明限定在权利要求的范围内。在整个说明书中，相同的参考数字表示相同的元件。
因此，一些示例性实施方式中的公知技术不作详细描述以避免本发明的解释不清楚。除非另外定义，应理解，说明书中使用的全部术语(包括技术和科学术语)与本领域的普通技术人员的理解具有相同的含义。在整个说明书中，除非明确地描述为相反情况，词语“包含(comprise)”以及变体诸如“包括(comprises)”或“含有(comprising)”应当理解为暗示涵盖所述要素而不排除任何其他要素。此外，除非相反地明确说明，否则本说明书中的单数形式包括复数形式。
图1是根据本发明示例性实施方式的废气后处理系统的示意图。
参考图1，所述废气后处理系统包括发动机(引擎)100、排气管(排气管线，exhaust line)110、氧化催化剂120、柴油颗粒过滤器130、定量给料模块140，以及选择性催化还原(选择性催化还原模块)150。
氧化催化剂120、柴油颗粒过滤器130、定量给料模块140，以及选择性催化还原150顺序配置在排气管110中，并且废气在排放到外部之前由它们进行净化。
氧化催化剂120将包括在废气中的烃(碳氢化合物)和一氧化碳氧化，并且柴油颗粒过滤器130收集包括在废气中的颗粒物并将它们在预定的温度条件下燃烧以去除。
此外，氧化催化剂120将包括在废气中的一氧化氮(NO)转化为二氧化氮(NO2)，并且柴油颗粒过滤器130通过氧化催化剂120的氧化反应升高温度，以再生收集的颗粒物。
所述氧化催化剂120可以包括由铂(Pt)和钯(Pd)组成的催化剂组分。详细地，氧化催化剂120可以包括，其中铂(Pt)和钯(Pd)的摩尔比是4:1的催化剂组分。
根据本发明的示例性实施方式，所述柴油颗粒过滤器130包括由La1-xAgxMnO3(其中0<x<1)表示的催化剂组分，其中该催化剂组分将包括在废气中的一氧化氮氧化为二氧化氮以供应至后级。在此，选择性催化还原150使用由柴油颗粒过滤器130供应的二氧化氮以最大化氮氧化物的净化效率。
颗粒物的氧化也由二氧化氮与颗粒物的反应促进，同时一氧化氮氧化为二氧化氮。
所述由La1-xAgxMnO3(其中0<x<1)表示的催化剂组分增加了一氧化氮在，具体地，200℃至300℃的低温区的转化。更详细地，柴油颗粒过滤器可以包括由La1-xAgxMnO3(然而，0.2≤x≤0.8)表示的催化剂组分。
所述定量给料模块140将还原剂注入排气管110，其中该还原剂可以包括尿素(urea)。所述选择性催化还原150使用由定量给料模块140注入的还原剂以去除包括在废气中的氮氧化物。
选择性催化还原150使用由柴油颗粒过滤器130供应的二氧化氮以最大化氮氧化物的净化效率。详细地，选择性催化还原可以包括由选自V2O5、WO3、Cu和Fe中的至少一种组成的催化剂组分。更详细地，选择性催化还原可以包括V2O5-WO3/TiO2、Cu-沸石，或Fe-沸石。
当选择性催化还原150的前级的废气中的一氧化氮和二氧化氮的体积比为1:1时，由于SCR反应，在200℃至350℃的低温区中的氮氧化物净化效率得以改善。
根据本发明的示例性实施方式，通过包括在柴油颗粒过滤器130中的催化剂组分，将二氧化氮(NO2)供应至后级，改善了选择性催化还原150的氮氧化物净化效率。
在下文中，将描述本发明构思的各种实施例以及比较例。然而，以下实施例仅是本发明的优选实施例，并且因此本发明不限于以下实施例。
制备实施例：钙钛矿整体型(monolith-type)催化反应器的制备
用于NO氧化性能评估的钙钛矿整体型催化反应器通过一般浸渍法(general dipping method)将堇青石载体(substrate)使用钙钛矿涂覆。用于涂覆的堇青石载体使用具有0.7in(英寸)直径以及0.57in(英寸)高度的400cpsi孔的整体块(单块，monolith)。在通过将钙钛矿催化剂和蒸馏水在预定的比例下混合并在其上进行球磨制备的浆液上重复浸渍->鼓风->干燥(110℃)，直至相对于堇青石40wt％支持在载体内。最后，将涂覆的整体(单块)催化反应器在700℃的空气气氛下煅烧5个小时，并且然后通过以下评估方法进行NO氧化性能评估。
评估方法：NO氧化性能评估
NO氧化性能评估是在固定床连续流动反应器系统中进行的，并且在评估时使用整体型催化反应器。注入的反应气体浓度是400ppm的NO、8％的O2、10％的H2O，以及余量的N2，在评估时将反应器空间速度(reactorspace speed)维持在30000h-1，并通过线上连接至反应器的FT-IR(Nicolet6700，Thermo Electronic Co.)分析反应之后和之前的反应气体浓度变化。
实施例1
将包括400ppm作为体积％的NO、8％的O2、10％的H2O，以及余量的N2的废气以30000h-1的空间速度供应至涂覆有La0.9Ag0.1MnO3催化剂的整体催化剂。
通过上述评估方法测量每个温度的NO转化，并且测量结果在图2中示出。
实施例2
除了制备涂覆有La0.8Ag0.2MnO3催化剂的整体催化剂外，通过与实施例1相同的方法进行实施例2。
通过上述评估方法测量每个温度的NO转化，并且测量结果在图2中示出。
实施例3
除了制备涂覆有La0.5Ag0.5MnO3催化剂的整体催化剂外，通过与实施例1相同的方法进行实施例3。
通过上述评估方法测量每个温度的NO转化，并且测量结果在图2中示出。
实施例4
除了制备涂覆有La0.2Ag0.8MnO3催化剂的整体催化剂外，通过与实施例1相同的方法进行实施例4。
通过上述评估方法测量每个温度的NO转化，并且测量结果在图2中示出。
比较例1
除了制备涂覆有La0.9Sr0.1MnO3催化剂的整体催化剂外，通过与实施例1相同的方法进行比较例1。
通过上述评估方法测量每个温度的NO转化，并且测量结果在图2中示出。
由图2可以发现，实施例1至4中制备的涂覆有钙钛矿的整体催化剂含有优异的一氧化氮转化，并且特别地，在200℃至300℃的低温区具有更加优异的转化。
实验例1：氮氧化物去除实验
将包括400ppm作为体积％的NO、8％的O2、10％的H2O，以及余量的N2的废气以60000h-1的空间速度在250℃下供应至1.1cc的以20/30目制备的La0.5Ag0.5MnO3催化剂。将所述反应气体加入通过的废气，从而使反应气体整体变为500ppm的NH3、500ppm的NOx、5.6％的O2、10％的H2O，以及余量的N2，以在100000h-1的空间速度下流入0.95cc的以20/30目制备的V2O5-WO3/TiO2选择性催化还原。
测量通过选择性催化还原的废气的氮氧化物(NOx)的转化，并且测量结果在图3中示出。
实验例2
不将La0.5Ag0.5MnO3催化剂置于选择性催化还原的前级且仅设置V2O5-WO3/TiO2选择性催化还原。
将包括500ppm作为体积％的NH3、500ppm的NO、5％的O2、10％的H2O，以及余量的N2的废气以100000h-1的空间速度供应至选择性催化还原。
测量通过选择性催化还原的废气的氮氧化物(NOx)的转化，并且测量结果在图3中示出。
实验例3
不将La0.5Ag0.5MnO3催化剂置于选择性催化还原的前级且仅设置V2O5-WO3/TiO2选择性催化还原。
将包括500ppm作为体积％的NH3、250ppm的NO、250ppm的NO2、5％的O2、10％的H2O，以及余量的N2的废气以100000h-1的空间速度供应至选择性催化还原。
测量通过选择性催化还原的废气的氮氧化物(NOx)的转化，并且测量结果在图3中示出。
由图3可以确认，在选择性催化还原的前级包括La0.5Ag0.5MnO3催化剂的废气后处理系统的氮氧化物转化可以具有优异的氮氧化物转化，并且与实验例3的转化大致相同，其中可以获得控制在1:1的一氧化氮和二氧化氮的体积比。具体地，可以确认在250℃至350℃的低温区中的氮氧化物转化是优异的。
颗粒物的再生实验使用柴油发动机以测量，在DPF的前级温度为350℃和640℃的条件下，分别维持60分钟和12分钟之后PM的净化性能。评估布局配置有DOC+DPF系统，DOC催化剂使用涂覆有贵金属比例为2Pt/1Pd的催化剂的整体催化剂，DPF分别涂覆有贵金属比例为1Pt/1Pd的贵金属催化剂、La0.5Ag0.5MnO3催化剂、Ag/CeO2催化剂，用于进行比较评估。
实验例4：颗粒物再生实验
涂覆有具有1Pt/1Pd的贵金属催化剂的DPF测量颗粒物再生结果，并且测量结果整理在下表1中。
实验例5
涂覆有La0.5Ag0.5MnO3催化剂的DPF测量颗粒物再生结果，并且测量结果整理在下表1中。
实验例6
涂覆有Ag/CeO2催化剂的DPF测量颗粒物再生结果，并且测量结果整理在下表1中。
(表1)
在350℃下再生 在640℃下再生
实验例4 20％ 70％
实验例5 30％ 69％
实验例6 17％ 64％
如上表1中示出的，在实验例4中，可以确认在350℃和640℃两种温度下，再生率是相等的或优异的，特别地，再生比率在350℃的区间是优异的。
由于根据本发明的示例性实施方式，NO在柴油颗粒过滤器中氧化为NO2，可以确认颗粒物通过颗粒物与NO2的反应而氧化。
本发明不限于以上实施例，而是可以以不同的各种形式制备，并且可以理解的是本发明所属领域的普通技术人员可以不改变本发明的技术构思或基本特征而以其他详细的形式实施本发明。因此，应当理解的是，上述实施方式并非限制性的，而在所有方面均是示例性的。
尽管已经连同目前认为是实用的示例性实施方式一起描述了本发明，但是应该理解的是，本发明并不限于所公开的实施方式，而是，相反，旨在涵盖包括在所附权利要求的精神和范围内的各种修改和等同安排。

Claims (6)

1.一种废气后处理系统，包括：
配置以氧化包括在所述废气中的物质的氧化催化剂；
配置以收集包括在所述废气中的颗粒物且置于所述氧化催化剂之后的柴油颗粒过滤器；
配置以注入还原剂且置于所述柴油颗粒过滤器之后的定量给料模块；以及
配置以使用包括在所述废气中的所述还原剂去除氮氧化物且置于所述定量给料模块之后的选择性催化还原，
其中所述柴油颗粒过滤器包括由La1-xAgxMnO3表示的催化组分，其中0<x<1。
2.根据权利要求1所述的废气后处理系统，其中：
所述柴油颗粒过滤器包括由La1-xAgxMnO3表示的催化剂组分，其中0.2≤x≤0.8。
3.根据权利要求1所述的废气后处理系统，其中：
所述氧化催化剂包括由铂和钯组成的催化剂组分。
4.根据权利要求1所述的废气后处理系统，其中：
所述选择性催化还原包括由选自由以下各项所组成的组中的至少一种组成的催化剂组分：V2O5、WO3、Cu和Fe。
5.根据权利要求1所述的废气后处理系统，其中：
所述选择性催化还原包括选自由以下各项所组成的组中的至少一种：V2O5-WO3/TiO2、Cu-沸石，或Fe-沸石。
6.根据权利要求1所述的废气后处理系统，其中：
所述还原剂包括尿素。
CN201510882005.6A 2015-09-30 2015-12-03 废气后处理系统 Expired - Fee Related CN106555641B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2015-0137908 2015-09-30
KR1020150137908A KR101703624B1 (ko) 2015-09-30 2015-09-30 배기가스 후처리 시스템

Publications (2)

Publication Number Publication Date
CN106555641A true CN106555641A (zh) 2017-04-05
CN106555641B CN106555641B (zh) 2019-12-31

Family

ID=58108110

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510882005.6A Expired - Fee Related CN106555641B (zh) 2015-09-30 2015-12-03 废气后处理系统

Country Status (4)

Country Link
US (1) US9828895B2 (zh)
KR (1) KR101703624B1 (zh)
CN (1) CN106555641B (zh)
DE (1) DE102015121216B4 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114813880A (zh) * 2022-04-28 2022-07-29 安徽大学 一体化电化学气体传感器及制备工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102122849B1 (ko) * 2019-02-08 2020-06-15 주식회사 에코닉스 차량용 선택적 환원촉매(scr) 장치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999039809A1 (en) * 1998-02-06 1999-08-12 Johnson Matthey Public Limited Company SYSTEM FOR NOx REDUCTION IN EXHAUST GASES
CN1879961A (zh) * 2005-06-14 2006-12-20 天津大学 用于汽车尾气净化的La1－xAgxMnO3钙钛矿型催化剂
CN102869430A (zh) * 2010-06-24 2013-01-09 恩亿凯嘉股份有限公司 采用选择还原催化剂的废气净化催化剂装置、废气净化方法以及搭载了废气净化催化剂装置的柴油汽车
US20140174404A1 (en) * 2012-12-21 2014-06-26 Caterpillar Inc. Fuel system
US20140331752A1 (en) * 2013-05-08 2014-11-13 Cummins Ip, Inc. Exhaust aftertreatment system diagnostic and conditioning
JP2015068175A (ja) * 2013-09-26 2015-04-13 三菱重工業株式会社 排ガス処理装置及び排ガス処理方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6322605B1 (en) 2000-05-31 2001-11-27 Corning Incorporated Diesel exhaust filters
US7119044B2 (en) 2003-06-11 2006-10-10 Delphi Technologies, Inc. Multiple washcoats on filter substrate
US7490464B2 (en) * 2003-11-04 2009-02-17 Basf Catalysts Llc Emissions treatment system with NSR and SCR catalysts
KR20050114296A (ko) 2004-06-01 2005-12-06 현대자동차주식회사 디젤매연 촉매필터의 제조방법
EP1829609A4 (en) 2004-12-24 2011-04-20 Dowa Electronics Materials Co CATALYST OF COMBUSTION OF PARTICULATE MATTER AND FILTER
JP2007224747A (ja) 2006-02-21 2007-09-06 Mitsubishi Motors Corp ディーゼルエンジンの排ガス浄化用フィルタおよび排ガス浄化装置
DE102008009672B4 (de) 2008-02-18 2016-02-25 Süd-Chemie Ip Gmbh & Co. Kg SCR-Katalysator mit Kohlenwasserstoffspeicherfunktion, dessen Verwendung und Abgasreinigungssystem und dessen Verwendung
US20090324468A1 (en) * 2008-06-27 2009-12-31 Golden Stephen J Zero platinum group metal catalysts
US8844274B2 (en) 2009-01-09 2014-09-30 Ford Global Technologies, Llc Compact diesel engine exhaust treatment system
KR101566680B1 (ko) 2009-07-03 2015-11-09 에스케이이노베이션 주식회사 배기가스 저감 장치 및 배기가스 저감 방법
KR20120012068A (ko) * 2010-07-30 2012-02-09 현대자동차주식회사 배기가스 후처리 시스템
US20120042631A1 (en) 2010-08-20 2012-02-23 Gm Global Technology Operations, Inc. Catalyst materials for ammonia oxidation in lean-burn engine exhaust
US8137648B2 (en) * 2010-10-12 2012-03-20 Ford Global Technologies, Llc Diesel engine exhaust treatment system and method including a platinum group metal trapping device
US8943811B2 (en) 2010-12-22 2015-02-03 GM Global Technology Operations LLC Perovskite-based catalysts, catalyst combinations and methods of making and using the same
WO2012147583A1 (ja) 2011-04-28 2012-11-01 日産自動車株式会社 層状複合酸化物、酸化触媒及びディーゼルパーティキュレートフィルター
KR101936433B1 (ko) * 2012-06-08 2019-01-08 현대자동차주식회사 Ｎｏ 산화용 페로브스카이트 촉매 및 그 제조방법
KR20150137908A (ko) 2014-05-31 2015-12-09 이윤택 홀로그래피 터치 방법 및 프로젝터 터치 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999039809A1 (en) * 1998-02-06 1999-08-12 Johnson Matthey Public Limited Company SYSTEM FOR NOx REDUCTION IN EXHAUST GASES
CN1879961A (zh) * 2005-06-14 2006-12-20 天津大学 用于汽车尾气净化的La1－xAgxMnO3钙钛矿型催化剂
CN102869430A (zh) * 2010-06-24 2013-01-09 恩亿凯嘉股份有限公司 采用选择还原催化剂的废气净化催化剂装置、废气净化方法以及搭载了废气净化催化剂装置的柴油汽车
US20140174404A1 (en) * 2012-12-21 2014-06-26 Caterpillar Inc. Fuel system
US20140331752A1 (en) * 2013-05-08 2014-11-13 Cummins Ip, Inc. Exhaust aftertreatment system diagnostic and conditioning
JP2015068175A (ja) * 2013-09-26 2015-04-13 三菱重工業株式会社 排ガス処理装置及び排ガス処理方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114813880A (zh) * 2022-04-28 2022-07-29 安徽大学 一体化电化学气体传感器及制备工艺

Also Published As

Publication number Publication date
US20170089240A1 (en) 2017-03-30
US9828895B2 (en) 2017-11-28
KR101703624B1 (ko) 2017-02-07
DE102015121216A1 (de) 2017-03-30
CN106555641B (zh) 2019-12-31
DE102015121216B4 (de) 2022-06-09

Similar Documents

Publication Publication Date Title
CN101564646B (zh) 净化柴油机废气的方法
RU2675363C2 (ru) Катализатор обработки проскочившего аммиака
US8506892B2 (en) Exhaust gas purifying device for diesel engine
EP3004578B1 (en) Catalyzed filter for treating exhaust gas
CN102600721B (zh) 钙钛矿基催化剂、催化剂组合以及制备和使用它们的方法
CN105715329A (zh) 用于净化柴油发动机的排出气体的方法
CN102454453B (zh) 具有降低的so3产生和改进的耐久性的排放scr nox后处理系统
WO2009093071A1 (en) Catalysed filter
CN105636690A (zh) Scr催化剂
Martinovic et al. Aftertreatment technologies for diesel engines: An overview of the combined systems
US10279313B2 (en) Method, multifunctional filter and system for the removal of particulate matter and noxious compounds from engine exhaust gas
López-De Jesús et al. NOx and PM reduction from diesel exhaust using vanadia SCRF®
EP2014348A2 (en) A method and a system for a treatment of a NOx- and soot-containing exhaust gas
CN103806989A (zh) 用于车辆的排放气体净化系统
CN106640281B (zh) 柴油机微粒过滤器及含其的废气后处理系统
CN106555641A (zh) 废气后处理系统
RU2012121578A (ru) Способ и аппарат для очистки выхлопного газа двигателя внутреннего сгорания
JP2004188388A (ja) ディーゼル排ガス浄化用フィルタおよびその製造方法
US20160107150A1 (en) Non-platinum based ammonia oxidation catalysts and applications on aftertreatment systems
JP6339729B2 (ja) 排ガス処理装置及び排ガス処理用触媒の製造方法
US9708949B2 (en) Exhaust aftertreatment system for a compression-ignition engine
JP5875562B2 (ja) 排ガス処理装置及び排ガス処理方法
JP6182036B2 (ja) 排ガス処理用触媒及び排ガス処理装置、並びに排ガス処理用触媒の製造方法
JPH0563222B2 (zh)
Yoon et al. Study of NO storage and reduction on LNT by micro bench-flow reactor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191231