CN107206360A - 三效催化剂 - Google Patents

三效催化剂 Download PDF

Info

Publication number
CN107206360A
CN107206360A CN201680008717.8A CN201680008717A CN107206360A CN 107206360 A CN107206360 A CN 107206360A CN 201680008717 A CN201680008717 A CN 201680008717A CN 107206360 A CN107206360 A CN 107206360A
Authority
CN
China
Prior art keywords
way catalyst
oxide
palladium
load
catalyst compositions
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
Application number
CN201680008717.8A
Other languages
English (en)
Inventor
N·M·C·费利克斯
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.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey PLC
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 Johnson Matthey PLC filed Critical Johnson Matthey PLC
Publication of CN107206360A publication Critical patent/CN107206360A/zh
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8946—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with alkali or alkaline earth metals
    • 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
    • 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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • 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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • 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
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/005—Spinels
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/44—Palladium
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/464—Rhodium
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8913—Cobalt and noble metals
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/894—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • B01J37/0205—Impregnation in several steps
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08—Heat treatment
    • B01J37/082—Decomposition and pyrolysis
    • B01J37/088—Decomposition of a metal salt
    • 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
    • F01N3/101—Three-way catalysts
    • 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
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/204—Alkaline earth metals
    • B01D2255/2042—Barium
    • 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
    • B01D2255/20746—Cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • B01D2255/405—Spinels
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
    • 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
    • B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/19—Catalysts containing parts with different compositions
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0244—Coatings comprising several layers
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

公开了一种三效催化剂组合物，和它在内燃机排气系统中的用途。该三效催化剂组合物包含铑、含铈的氧化物和负载的钯组分。该负载的钯组分包含钯、钡和钴和氧化铝。该三效催化剂组合物表现出改进的起燃性能。

Description

三效催化剂
发明领域
本发明涉及一种三效催化剂组合物，它在内燃机排气系统中的用途和处理内燃机废气的方法。
发明背景
内燃机产生了含有多种污染物的废气，包括烃(HC)，一氧化碳(CO)和氮氧化物(“NOx”)。排放控制系统，包括废气催化剂，广泛用于降低排放到大气中的这些污染物的量。一种用于汽油机应用的常用催化剂是“三效催化剂”(TWC)。TWC发挥了三个主要功能：(1)一氧化碳(CO)的氧化；(2)未燃烧的烃的氧化；和(3)NOx还原成N2。
TWC如同其他废气催化剂那样，一旦它们达到它们的起燃温度，典型地实现了非常高的效率。具有低起燃温度的TWC通过降低排气系统达到运行所需温度花费的时间，而使得催化剂更快的工作。因为废气在达到起燃之前未被处理，因此这段时间会导致增加的排放。由于甚至更严格的国家和地区立法降低了可以从柴油机或汽油机排放的污染物的量，因此降低起燃之前的时间期间过程中的排放变成一个主要挑战。因此，要持续开发用于降低冷启动条件过程中排放的NOx和烃的水平的方法和新催化剂。
对于任何汽车系统和方法，令人期望的是在废气处理系统中，特别是在低温条件下获得仍然进一步的改进。我们已经发现一种新的三效催化剂，其对于内燃机废气提供了增强的清洁。
发明内容
本发明是一种三效催化剂组合物，其包含铑，含铈的氧化物和负载的钯组分。该负载的钯组分包含钯、钡、钴和氧化铝。本发明还包括一种三效催化剂组分，其包含负载于基底上的三效催化剂组合物，和它在排气系统中的用途。该三效催化剂组合物表现出改进的起燃性能。
附图说明
图1显示了对于本发明催化剂和对比催化剂，在连续λ0.95时氧化还原老化的样品的NOx起燃结果。
图2显示了对于本发明催化剂和对比催化剂，在连续λ0.95时氧化还原老化的样品的烃(HC)起燃结果。
图3显示了对于本发明催化剂和对比催化剂，在连续λ0.95时氧化还原老化的样品的CO起燃结果。
具体实施方式
本发明的三效催化剂组合物包含铑、含铈的氧化物和负载的钯组分。该负载的钯组分包含钯、钡、钴和氧化铝。
该负载的钯组分包含氧化铝。有用的氧化铝优选的表面积是10-1500m2/g，孔体积是0.1-4mL/g和孔径是大约10-1000埃。特别优选的是表面积大于80m2/g的高表面积氧化铝。优选氧化铝是稀土或者碱土金属稳定化的氧化铝。优选该稀土或者碱土金属稳定化的氧化铝，其包含：含有镧、钕、镨、钇、钡、镁和锶的稀土或者碱土金属。优选该稀土、碱土金属或者过渡金属稳定化的氧化铝包含0.1-20重量％(更优选0.5-5重量％)的稀土或者碱土金属或者过渡金属。
本发明的负载的钯组分还包含钯、钡和钴。该负载的钯组分可以通过任何合适的手段来制备。优选该钯、钴和钡是通过任何已知的手段负载到氧化铝上来形成负载的钯组分。例如钯化合物(例如硝酸钯)、钴化合物(例如硝酸钴)和钡化合物(例如硝酸钡)可以通过浸渍、吸附、离子交换、初湿含浸法、沉淀、喷雾干燥等负载到氧化铝载体上。
将钯、钴和钡化合物添加到氧化铝的次序可以处于许多不同的次序。例如钯、钴和钡化合物可以同时添加到氧化铝，或者可以以任何次序依次加入(例如Co，然后是Ba，然后是Pd等)。优选在添加钯和钡化合物之前将钴化合物添加到氧化铝载体上。
在一种优选的实施方案中，在添加钯和钡之前，负载的钯组分的钴和氧化铝是铝酸钴尖晶石的形式。铝酸钴尖晶石优选的Co与Al原子比是大约0.17至大约1，更优选大约0.25至大约0.75和最优选大约0.35至大约0.65。一种最优选的铝酸钴尖晶石包括CoAl2O4。
铝酸钴可以通过将钴化合物浸渍到氧化铝上来形成钴-氧化铝物质，然后高温煅烧来形成。优选该浸渍的钴-氧化铝物质是在大于800℃，更优选大于900℃的温度煅烧来形成铝酸钴尖晶石而形成的。该煅烧典型的在含氧气体(例如空气)存在下进行大于1小时。该高温煅烧导致形成尖晶石。
如果没有形成铝酸钴尖晶石，并且仅仅使用浸渍的钴-氧化铝，则仍然改进了起燃性能，虽然与铝酸钴尖晶石相比没有改进。
该负载的钯组分优选包含0.1-10重量％的钯，更优选0.5-5重量％的钯和最优选1-3重量％的钯。该负载的钯组分优选包含0.5-10重量％的钴，更优选2-15重量％的钴和最优选3-12重量％的钴。该负载的钯组分优选包含1-10重量％的钡，更优选2-8重量％的钡和最优选3-7重量％的钡。优选钴：钡重量比大于1，更优选2或更高。
除了负载的钯组分之外，本发明的三效催化剂组合物包含铑和含铈的材料。该含二氧化铈的材料优选是二氧化铈，二氧化铈-氧化锆，二氧化铈-氧化锆-氧化铝或其混合物。更优选该含二氧化铈的材料是二氧化铈-氧化锆。
优选铑负载于无机氧化物载体上。该无机氧化物载体优选包括第2、3、4、5、13和14族元素的氧化物。最优选该载体是氧化铝、二氧化硅、二氧化钛、氧化锆、氧化镁、氧化铌、氧化钽、氧化钼、氧化钨或者其任意两种或更多种的混合氧化物或者复合氧化物(例如二氧化硅-氧化铝、氧化镁-氧化铝等)及其混合物。有用的无机氧化物优选的表面积是10-1500m2/g，孔体积是0.1-4mL/g和孔径是大约10-1000埃。特别优选的是表面积大于80m2/g的高表面积载体。在一种实施方案中，铑负载于含铈的材料上。
铑可以通过任何已知的手段负载到无机氧化物载体上，添加方式不被认为是特别关键的。例如铑化合物(例如硝酸铑)可以通过浸渍、吸附、离子交换、初湿含浸法、沉淀、喷雾干燥等加入氧化铝。优选如果铑沉积在载体上，则该负载的铑包含至少0.04重量％的铑。
本发明还包括一种三效催化剂组分，其包含负载于陶瓷基底或者金属基底上的三效催化剂组合物。该陶瓷基底可以由任何合适的耐热难熔材料制成，例如氧化铝、二氧化硅、二氧化钛、二氧化铈、氧化锆、氧化镁、沸石、氮化硅、碳化硅、硅酸锆、硅酸镁、铝硅酸盐和金属铝硅酸盐(例如堇青石和锂辉石)，或者其任意两种或更多种的混合物或者混合氧化物。堇青石、铝硅酸镁和碳化硅是特别优选的。
该金属基底可以由任何合适的金属制成，和特别是由耐热金属和金属合金例如钛和不锈钢以及含有铁、镍、铬和/或铝以及其他痕量金属的铁酸盐合金制成。
该基底优选是流通式基底或者滤过式基底。最优选该基底是流通式基底。具体的，该流通式基底是流通式整料，优选具有蜂窝结构，其中有许多小的平行的薄壁通道轴向穿过该基底，并且从基底的入口或出口贯穿延伸。基底的通道横截面可以是任何形状，但是优选是正方形、正弦形、三角形、矩形、六边形、梯形、圆形或者椭圆形。
优选该三效催化剂组分是通过使用活性涂覆程序将三效催化剂组合物沉积在基底上来制备的。使用活性涂覆程序来制备该三效催化剂组分的一种代表性方法如下所述。将理解下面的方法可以根据本发明不同的实施方案而变化。
优选如下来进行该活性涂覆：首先将细微分散的三效催化剂组合物粒子在适当的溶剂，优选水中制浆，来形成浆料。该浆料优选包含5-70重量％，更优选10-50重量％的固体。优选将该粒子研磨或者进行另一粉碎方法，来确保在形成浆料之前，基本上全部的固体粒子具有平均粒径小于20微米的粒度。另外的组分例如稳定剂或者促进剂也可以作为水溶性或者水分散性化合物或者络合物的混合物引入该浆料中。
该基底然后可以用浆料涂覆一次或多次，以使得在基底上将沉积期望负载量的三效催化剂组合物。
优选该三效催化剂组分包含基底和在该基底上的至少一个层。在一种实施方案中，该至少一个层包含该三效催化剂组合物，以使得负载的钯组分、铑和含二氧化铈的氧化物全部处于一个层中。这可以通过上述活性涂覆程序来产生。一种或多种另外的层可以添加到三效催化剂组合物的一个层中。
在另一实施方案中，在基底上设置两个层。第一层包含负载的钯组分和第二层包含铑和含二氧化铈的氧化物。该第一层设置于基底上，和该第二层沉积在第一层上。
所述层优选使用上述活性涂覆程序来沉积。例如该第一层优选是使用活性涂覆程序来制备的。该负载的钯组分通过首先将细微分散的负载的钯组分粒子在适当的溶剂，优选水中制浆来形成浆料，来首先涂覆到基底。该浆料优选包含5-70重量％的固体，更优选10-50重量％的固体。优选将该粒子研磨或者进行另一粉碎方法，来确保在形成浆料之前，基本上全部的固体粒子具有平均粒径小于20微米的粒度。另外的组分例如稳定剂或者促进剂也可以作为水溶性或者水分散性化合物或者络合物的混合物引入该浆料中。
该基底然后可以用负载的钯浆料涂覆一次或多次，以使得在该基底上第一层中将沉积期望负载量的催化材料。
优选基底的整个长度是用第一层浆料涂覆的，以使得第一层的活性涂层覆盖基底的整个表面。
在第一层沉积在基底之后，该第一层典型地通过在优选80-150℃的升高的温度加热来干燥。该基底还可以在较高温度(例如400-600℃)煅烧，但是在添加第二层之前典型地不需要煅烧。
然后将该含有铑和含二氧化铈的材料的第二层以类似于上述方式添加到第一层，然后通过在优选80-150℃的升高的温度加热来干燥。该基底还可以在较高温度(例如400-600℃)煅烧，但是在添加第三层之前典型地不需要煅烧。优选将基底的整个长度用第二层浆料涂覆，以使得第二层的活性涂层覆盖基底的整个表面。
还可以在基底上形成负载的钯组分来生产该三效催化剂组分的第一层。在这样的程序中，将氧化铝(或铝酸钴)浆料如上所述活性涂覆到基底上。在氧化铝(或铝酸钴)已经沉积在基底上之后，和任选地煅烧之后，然后可以将钯、钡(和需要时钴)化合物添加到氧化铝(或者铝酸钴)活性涂层。该钯和钡(和需要时钴)可以通过任何已知的手段添加，包括钯化合物、钡化合物和钴化合物的浸渍、吸附、离子交换或者喷雾干燥。该钯化合物和钡化合物(和需要时钴化合物)可以同时或者以任何次序依次加入。
本发明还包括一种内燃机排气系统，其包含本发明的三效催化剂组分。在该排气系统中，该三效催化剂组分可以置于紧耦合位置或者地板下位置。
本发明还包括处理内燃机废气，特别是处理汽油机废气。该方法包括将该废气与本发明的三效催化剂组分接触。
下面的实施例仅仅说明本发明。本领域技术人员将认可许多变体处于本发明的主旨和权利要求的范围内。
催化剂1A(Pd-Ba-Co/氧化铝载体)：
通过湿浸渍来制备催化剂1A。将硝酸钴(I I)六水合物(4.94g)溶解在去离子水(约15mL)中。然后将该Co溶液逐步添加到氧化铝载体(10g)，然后在105℃干燥2-3小时，随后在650℃煅烧2小时来形成Co/Al2O3。然后将乙酸钡(1.86g)溶解在去离子水中，产生最终体积13mL。将该Ba溶液逐步添加到Co/Al2O3中。将粉末依次在105℃干燥2-3小时和在650℃煅烧2小时，形成Ba-Co/Al2O3。最后，将硝酸钯溶液(1.33g的Pd(NO3)2，含量分析15.03％)在13mL去离子水中稀释。将该Pd溶液逐步添加到Ba-Co/Al2O3中，随后在105℃干燥加工2-3小时和在650℃煅烧2小时来形成催化剂1A。催化剂1A包含1wt％的Pd，5wt％的Ba和5wt％的Co。
催化剂1B(Pd-Ba/CoAl2O4)：
根据催化剂1A的程序制备催化剂1B，不同在于在添加硝酸钴之后所用的煅烧是在1000℃进行4小时来获得CoAl2O4。催化剂1B包含1wt％的Pd，5wt％的Ba和5wt％的Co。
对比催化剂1C(Pd-Ba/氧化铝载体)：
根据催化剂1A的程序制备对比催化剂1C，不同在于使用稳定化的氧化铝载体，并且没有向该催化剂添加钴。对比催化剂1C包含1wt％的Pd和5wt％的Ba。
对比催化剂1D(Pd/CoAl2O4)：
根据催化剂1B的程序制备对比催化剂1D，不同在于使用了更高的Co含量，并且没有向该催化剂添加钡。对比催化剂1D包含1wt％的Pd和20wt％的Co。
在制备它们之后，将全部的催化剂进行氧化还原老化。老化由以下组：在950℃在16小时的时间内，每5分钟在富燃条件和贫燃条件之间切换。在氧化还原老化过程中的气体组成如表1所示。
实施例2：起燃测试程序
在具有典型的TWC气体组成的连续气体混合物下测试催化剂1A-1D。使用10℃/min的斜坡升温速率从110到500℃来测试样品。对于混合有0.2g堇青石的0.2g催化剂来说(其置于固定床反应器中)，所用的总流量是5L/min。所用气体和它们的浓度可以在下面(表2)中找到。
结果显示本发明的催化剂(催化剂1A和催化剂1B)具有与对比催化剂1C和1D相比改进的起燃性能。催化剂1B显示了比催化剂1A改进的起燃性，这表明在添加Pd和Ba之前预先形成CoAl2O4尖晶石，优于仅仅浸渍。
表1：用于氧化还原老化的气体组成
气体 富燃 贫燃
N2 余量 余量
C3H6 1000ppm 1000ppm
CO 0.5％ 0.5％
NO 1000ppm 1000ppm
O2 0.27％ 1.07％
H2O 10％ 10％
表2：用于起燃实验的气体混合物组成
气体 λ富燃＝0.95
N2 余量
C3H8 333ppm
C3H6 666ppm
CO 2.3％
CO2 14％
NO 2200ppm
O2 0.9％
H2O 5％
H2 0.6％

Claims (15)

1.一种三效催化剂组合物，其包含铑、含二氧化铈的氧化物和负载的钯组分，其中该负载的钯组分包含钯、钡和钴和氧化铝。
2.权利要求1的三效催化剂组合物，其中该负载的钯组分包含钯、钡和铝酸钴尖晶石。
3.权利要求1或者权利要求2的三效催化剂组合物，其中该铑负载于无机氧化物载体上。
4.权利要求3的三效催化剂组合物，其中该无机氧化物载体选自氧化铝、二氧化硅、二氧化钛、氧化锆、二氧化铈、氧化铌、氧化钽、氧化钼、氧化钨及其混合氧化物或者复合氧化物。
5.前述任一项权利要求的三效催化剂组合物，其中该含二氧化铈的氧化物选自氧化铈、二氧化铈-氧化锆混合氧化物和氧化铝-二氧化铈-氧化锆混合氧化物。
6.前述任一项权利要求的三效催化剂组合物，其中该负载的钯组分包含0.1-1重量％的钯。
7.前述任一项权利要求的三效催化剂组合物，其中该负载的钯组分包含1-10重量％的钡。
8.前述任一项权利要求的三效催化剂组合物，其中该负载的钯组分包含0.5-20重量％的钴。
9.一种三效催化剂制品，其包含负载在金属或者陶瓷基底上的前述任一项权利要求的三效催化剂组合物。
10.权利要求9的三效催化剂制品，其中该基底是流通式整料。
11.权利要求9或者权利要求10的三效催化剂制品，其包含基底和在该基底上的至少一个层，其中该至少一个层包含该三效催化剂组合物。
12.权利要求9-11任一项的三效催化剂制品，其具有位于基底上的两个层，其中第一个层包含负载的钯组分和第二个层包含铑和含二氧化铈的氧化物。
13.权利要求12的三效催化剂制品，其中该第一个层位于基底上，和该第二个层沉积在第一个层上。
14.一种内燃机排气系统，其包含权利要求9-13任一项的三效催化剂组分。
15.一种处理内燃机废气的方法，其包括将该废气与权利要求1-8任一项的三效催化剂组合物接触或者与权利要求9-13任一项的三效催化剂制品接触。
CN201680008717.8A 2015-02-05 2016-02-05 三效催化剂 Pending CN107206360A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201562112275P 2015-02-05 2015-02-05
US62/112,275 2015-02-05
PCT/GB2016/050273 WO2016124943A1 (en) 2015-02-05 2016-02-05 Three-way catalyst

Publications (1)

Publication Number Publication Date
CN107206360A true CN107206360A (zh) 2017-09-26

Family

ID=55353241

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201680008717.8A Pending CN107206360A (zh) 2015-02-05 2016-02-05 三效催化剂

Country Status (10)

Country Link
US (1) US9707545B2 (zh)
EP (1) EP3253489A1 (zh)
JP (1) JP2018507102A (zh)
KR (1) KR20170115075A (zh)
CN (1) CN107206360A (zh)
BR (1) BR112017016618A2 (zh)
DE (1) DE102016102027A1 (zh)
GB (1) GB2537958A (zh)
RU (1) RU2017131043A (zh)
WO (1) WO2016124943A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112805089A (zh) * 2018-12-13 2021-05-14 庄信万丰股份有限公司 用于改善osc和twc性能的过渡金属掺杂的氧化铝
CN113522370A (zh) * 2020-04-16 2021-10-22 萧建兴 具热反应高效催化的触媒反应物的制作方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10493434B2 (en) * 2015-03-03 2019-12-03 Basf Corporation NOx adsorber catalyst, methods and systems
GB2545747A (en) * 2015-12-24 2017-06-28 Johnson Matthey Plc Gasoline particulate filter
US11130096B2 (en) * 2016-02-03 2021-09-28 Basf Corporation Multi-layer catalyst composition for internal combustion engines
CN107824185B (zh) * 2016-09-15 2021-03-26 丰田自动车株式会社 排气净化催化剂及其制造方法
US10265684B2 (en) * 2017-05-04 2019-04-23 Cdti Advanced Materials, Inc. Highly active and thermally stable coated gasoline particulate filters
WO2019055040A1 (en) * 2017-09-18 2019-03-21 Ford Global Technologies, Llc CATALYST FOR CONTROLLING THE EMISSIONS OF MOTOR VEHICLES
JP7310564B2 (ja) * 2019-07-19 2023-07-19 株式会社豊田中央研究所 排ガス浄化触媒
US11788450B2 (en) * 2020-10-30 2023-10-17 Johnson Matthey Public Limited Company TWC catalysts for gasoline engine exhaust gas treatments
JP7355775B2 (ja) * 2021-03-05 2023-10-03 トヨタ自動車株式会社 排ガス浄化用触媒
US11801491B1 (en) * 2022-04-21 2023-10-31 GM Global Technology Operations LLC Three-way catalyst with reduced palladium loading and method of making the three-way catalyst

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5894068A (en) * 1992-12-14 1999-04-13 Kharas; Karl C. C. Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
CN1316296A (zh) * 2000-02-02 2001-10-10 福特环球技术公司 三元稀士氧化物催化剂
CN101479023A (zh) * 2006-06-29 2009-07-08 乌米科雷股份两合公司 三元催化剂
US20100104491A1 (en) * 2007-08-09 2010-04-29 Basf Catalysts Llc Multilayered Catalyst Compositions
CN103182305A (zh) * 2011-12-27 2013-07-03 比亚迪股份有限公司 一种三元催化剂及其制备方法
CN103433057A (zh) * 2013-08-16 2013-12-11 南京工业大学 一种用于汽车尾气净化的三效催化剂及其制备方法
CN103619469A (zh) * 2011-06-01 2014-03-05 庄信万丰股份有限公司 冷起动催化剂和它在排气系统中的应用

Family Cites Families (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5610333A (en) * 1979-07-06 1981-02-02 Toyota Motor Corp Catalyst for cleaning up exhaust gas and manufacture of said catalyst
DE3314372A1 (de) * 1983-04-20 1984-10-25 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von substituierten phenolen
US4788174A (en) * 1986-12-03 1988-11-29 Catalysts And Chemicals Inc., Far East Heat resistant catalyst and method of producing the same
ATE78717T1 (de) * 1987-10-30 1992-08-15 Degussa Platin-freier dreiweg-katalysator.
JPH06504940A (ja) 1990-09-27 1994-06-09 エンゲルハード・コーポレーシヨン ベース金属酸化物助成ロジウム含有触媒組成物
US5116800A (en) * 1990-12-11 1992-05-26 Allied-Signal Inc. High durability and exhuast catalyst with low hydrogen sulfide emissions
JPH04367731A (ja) * 1991-06-12 1992-12-21 Matsushita Electric Ind Co Ltd 触媒組成物
US5407880A (en) * 1992-11-09 1995-04-18 Nissan Motor Co., Ltd. Catalysts for adsorption of hydrocarbons
US6087295A (en) * 1992-12-14 2000-07-11 Asec Manufacturing Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
US6069111A (en) 1995-06-02 2000-05-30 Nissan Motor Co., Ltd. Catalysts for the purification of exhaust gas and method of manufacturing thereof
JP3477982B2 (ja) * 1996-03-29 2003-12-10 日産自動車株式会社 排気ガス浄化用触媒及び排気ガス浄化方法
JPH10180099A (ja) * 1996-12-20 1998-07-07 Ngk Insulators Ltd 排ガス浄化用触媒及び排ガス浄化システム
JP4092441B2 (ja) * 1997-02-24 2008-05-28 日産自動車株式会社 排ガス浄化用触媒
US6348430B1 (en) * 1997-06-20 2002-02-19 Degussa Ag Exhaust gas treatment catalyst for internal combustion engines with two catalytically active layers on a carrier structure
GB9713428D0 (en) * 1997-06-26 1997-08-27 Johnson Matthey Plc Improvements in emissions control
US6294140B1 (en) * 1999-04-23 2001-09-25 Degussa Ag Layered noble metal-containing exhaust gas catalyst and its preparation
US6261989B1 (en) * 1999-05-19 2001-07-17 Daihatsu Motor Co., Ltd. Catalytic converter for cleaning exhaust gas
GB0028240D0 (en) * 2000-11-20 2001-01-03 Johnson Matthey Plc Three-way catalyst composition
US7276212B2 (en) * 2001-10-01 2007-10-02 Engelhard Corporation Exhaust articles for internal combustion engines
KR100488853B1 (ko) * 2002-05-31 2005-05-11 현대자동차주식회사 ２중층 코팅구조의 팔라듐-로듐 삼원촉매 제조방법
KR100494543B1 (ko) * 2002-06-14 2005-06-10 현대자동차주식회사 저 백금-팔라듐-로듐 함량의 삼원촉매 제조방법
US7022646B2 (en) * 2003-01-31 2006-04-04 Engelhard Corporation Layered catalyst composite
US7875250B2 (en) * 2003-12-11 2011-01-25 Umicore Ag & Co. Kg Exhaust treatment device, and methods of making the same
US20050164879A1 (en) * 2004-01-28 2005-07-28 Engelhard Corporation Layered SOx tolerant NOx trap catalysts and methods of making and using the same
US7795172B2 (en) * 2004-06-22 2010-09-14 Basf Corporation Layered exhaust treatment catalyst
JP2006043634A (ja) 2004-08-06 2006-02-16 Nissan Motor Co Ltd 排ガス浄化用触媒及び排ガス浄化用触媒の製造方法
JP5200315B2 (ja) * 2004-12-22 2013-06-05 日産自動車株式会社 排気ガス浄化触媒、及び排気ガス浄化触媒の製造方法
US7550124B2 (en) * 2006-08-21 2009-06-23 Basf Catalysts Llc Layered catalyst composite
US7758834B2 (en) * 2006-08-21 2010-07-20 Basf Corporation Layered catalyst composite
US7517510B2 (en) * 2006-08-21 2009-04-14 Basf Catalysts Llc Layered catalyst composite
US20080072578A1 (en) * 2006-09-21 2008-03-27 Kumar Sanath V Treatment Systems and Methods for Internal Combustion Engine Exhaust Streams
JP5100085B2 (ja) * 2006-10-31 2012-12-19 株式会社キャタラー 排ガス浄化用触媒
CN100998941B (zh) * 2007-01-04 2012-09-05 华东理工大学 一种前置催化剂及其制备方法
US8007750B2 (en) * 2007-07-19 2011-08-30 Basf Corporation Multilayered catalyst compositions
US8038951B2 (en) * 2007-08-09 2011-10-18 Basf Corporation Catalyst compositions
DE102007046158B4 (de) * 2007-09-27 2014-02-13 Umicore Ag & Co. Kg Verwendung eines katalytisch aktiven Partikelfilters zur Entfernung von Partikeln aus dem Abgas von mit überwiegend stöchiometrischem Luft/Kraftstoff-Gemisch betriebenen Verbrennungsmotoren
ATE457813T1 (de) * 2007-09-28 2010-03-15 Umicore Ag & Co Kg Entfernung von partikeln aus dem abgas von mit überwiegend stöchiometrischem luft/kraftstoff- gemisch betriebenen verbrennungsmotoren
RU2504431C2 (ru) * 2008-07-31 2014-01-20 Басф Се УДЕРЖИВАЮЩИЕ NOx МАТЕРИАЛЫ И ЛОВУШКИ, УСТОЙЧИВЫЕ К ТЕРМИЧЕСКОМУ СТАРЕНИЮ
JP5651685B2 (ja) * 2009-05-04 2015-01-14 ビーエーエスエフ コーポレーション 希薄燃焼ガソリンエンジンのためのｔｗｃの改善された希薄ｈｃ変換
CN102802784B (zh) * 2009-06-16 2014-12-03 株式会社科特拉 废气净化用催化剂、粉末材料及废气净化用催化剂的制造方法
US8833064B2 (en) * 2009-11-06 2014-09-16 Basf Corporation Small engine layered catalyst article and method of making
US8828343B2 (en) * 2010-03-05 2014-09-09 Basf Corporation Carbon monoxide conversion catalyst
US9242242B2 (en) * 2010-09-02 2016-01-26 Basf Se Catalyst for gasoline lean burn engines with improved NO oxidation activity
US8950174B2 (en) * 2010-09-02 2015-02-10 Basf Se Catalysts for gasoline lean burn engines with improved NH3-formation activity
US8323599B2 (en) * 2010-11-22 2012-12-04 Umicore Ag & Co. Kg Three-way catalyst having an upstream multi-layer catalyst
US8617496B2 (en) * 2011-01-19 2013-12-31 Basf Corporation Three way conversion catalyst with alumina-free rhodium layer
EP2780559A4 (en) * 2011-08-10 2016-01-13 Clean Diesel Tech Inc CATALYST BASED ON SOLID PALLADIUM SOLUTION AND METHODS OF MAKING
JP5709005B2 (ja) * 2011-10-26 2015-04-30 トヨタ自動車株式会社 排ガス浄化用触媒及びその製造方法
US20130287658A1 (en) 2012-04-26 2013-10-31 Johnson Matthey Public Limited Company NOx TRAP COMPOSITION
CN106413858A (zh) * 2014-06-06 2017-02-15 克林迪塞尔技术公司 铑铁催化剂

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5894068A (en) * 1992-12-14 1999-04-13 Kharas; Karl C. C. Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
CN1316296A (zh) * 2000-02-02 2001-10-10 福特环球技术公司 三元稀士氧化物催化剂
CN101479023A (zh) * 2006-06-29 2009-07-08 乌米科雷股份两合公司 三元催化剂
US20100104491A1 (en) * 2007-08-09 2010-04-29 Basf Catalysts Llc Multilayered Catalyst Compositions
CN103619469A (zh) * 2011-06-01 2014-03-05 庄信万丰股份有限公司 冷起动催化剂和它在排气系统中的应用
CN103182305A (zh) * 2011-12-27 2013-07-03 比亚迪股份有限公司 一种三元催化剂及其制备方法
CN103433057A (zh) * 2013-08-16 2013-12-11 南京工业大学 一种用于汽车尾气净化的三效催化剂及其制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112805089A (zh) * 2018-12-13 2021-05-14 庄信万丰股份有限公司 用于改善osc和twc性能的过渡金属掺杂的氧化铝
CN113522370A (zh) * 2020-04-16 2021-10-22 萧建兴 具热反应高效催化的触媒反应物的制作方法
CN113522370B (zh) * 2020-04-16 2023-04-14 八易能源科技股份有限公司 具有热反应高效催化的触媒反应物的制作方法

Also Published As

Publication number Publication date
RU2017131043A (ru) 2019-03-05
US9707545B2 (en) 2017-07-18
DE102016102027A1 (de) 2016-08-11
GB201602075D0 (en) 2016-03-23
JP2018507102A (ja) 2018-03-15
KR20170115075A (ko) 2017-10-16
BR112017016618A2 (pt) 2018-04-03
US20160228856A1 (en) 2016-08-11
WO2016124943A1 (en) 2016-08-11
EP3253489A1 (en) 2017-12-13
GB2537958A (en) 2016-11-02
RU2017131043A3 (zh) 2019-04-25

Similar Documents

Publication Publication Date Title
CN107206360A (zh) 三效催化剂
JP5996538B2 (ja) 改善されたｎｏ酸化活性度を有するリーン燃焼ガソリンエンジン用の触媒
KR102483435B1 (ko) 배기 시스템용 아산화질소 제거 촉매
JP7206045B2 (ja) 排気システム用の亜酸化窒素除去触媒
JP6932149B2 (ja) パラジウムディーゼル酸化触媒
EP3077085B1 (en) Passive nox adsorber comprising noble metal and small pore molecular sieve
KR101712684B1 (ko) 희박 연소 가솔린 엔진을 위한 ｔｗｃ의 개선된 희박 ｈｃ 전환
JP6272780B2 (ja) 改良されたＮＯｘトラップ
CN105813745B (zh) 包含两种不同贵金属-分子筛催化剂的废气催化剂
JP6991270B2 (ja) 白金族金属および非白金族金属を含有する触媒物品ならびに該触媒物品の製造方法およびその使用
CN107206358A (zh) 三效催化剂及其在排气系统中的应用
CN110072620A (zh) NOx吸附剂催化剂
CN110461443A (zh) 三层NOx吸附器催化剂
JP2020515383A (ja) ＮＯｘ吸着触媒
JP2020515391A (ja) ＮＯｘ吸着体触媒
JP2020515390A (ja) ＮＯｘ吸着触媒
JP2020515393A (ja) ＮＯｘ吸着触媒
JP2017510439A (ja) 改良された触媒化スートフィルター
KR20160145703A (ko) 대역화된 촉매 복합체
JP2008018418A (ja) 排ガス浄化用触媒
KR102401150B1 (ko) 디젤 산화 촉매 컨버터
US20230338939A1 (en) Diesel Oxidation Catalyst
JP2022526896A (ja) 調整可能なＮＯｘ吸着剤
JP2014213272A (ja) 排気浄化触媒及び排気浄化装置
US20220379293A1 (en) Diesel oxidation catalyst

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
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170926