EP3060330A1 - Catalyseur pour l'oxydation de co et de hc à faibles températures - Google Patents

Catalyseur pour l'oxydation de co et de hc à faibles températures

Info

Publication number
EP3060330A1
EP3060330A1 EP14786682.6A EP14786682A EP3060330A1 EP 3060330 A1 EP3060330 A1 EP 3060330A1 EP 14786682 A EP14786682 A EP 14786682A EP 3060330 A1 EP3060330 A1 EP 3060330A1
Authority
EP
European Patent Office
Prior art keywords
platinum
catalyst
palladium
catalyst according
carbon monoxide
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.)
Withdrawn
Application number
EP14786682.6A
Other languages
German (de)
English (en)
Inventor
Ruediger Hoyer
Fei WEN
Elena Mueller
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.)
Umicore AG and Co KG
Original Assignee
Umicore AG and Co KG
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 Umicore AG and Co KG filed Critical Umicore AG and Co KG
Publication of EP3060330A1 publication Critical patent/EP3060330A1/fr
Withdrawn legal-status Critical Current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
    • B01J23/38—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
    • 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
    • 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
    • B01J23/42—Platinum
    • 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
    • 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
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063—Titanium; Oxides or hydroxides thereof
    • 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
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/08—Silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • 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
    • 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
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/63—Platinum group metals 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • 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
    • B01J37/0234—Impregnation and coating simultaneously
    • 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
    • B01J37/0248—Coatings comprising impregnated particles
    • 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
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • 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
    • B01D2255/2065—Cerium
    • 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
    • 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
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • B01J37/0203—Impregnation the impregnation liquid containing organic compounds
    • 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
    • B01J37/0215—Coating
    • B01J37/0219—Coating the coating containing organic compounds
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a catalyst for the removal of carbon monoxide and hydrocarbon from the exhaust gas lean burned internal combustion engines, so for example, diesel engines, at very low temperatures, and a method for operating this
  • Oxidation Catalysts for Removing Noxious Gas Carbon monoxide (CO) and hydrocarbons (HC) from the exhaust of diesel and lean burn internal combustion engines are well known in the art and are based predominantly on platinum and alumina.
  • Examples of diesel oxidation catalysts can be found in the patent applications DE10308288 AI, DE19614540 AI, DE19753738 AI, DE3940758 AI, EP 0427970 A2 and DE4435073 AI. They use the oxygen present in the diesel exhaust gas in order to oxidize the noxious gases to carbon dioxide (CO2) and water vapor.
  • Hydrocarbons are described in WO2013 / 149881.
  • Diesel oxidation catalysts in addition to platinum and / or palladium ceria have significantly lower light-off temperatures, if they have certain peaks after CO adsorption in the Diffuse Reflectance Infrared Fourier Transmissive Spectroscopy (DRIFTS).
  • DRIFTS Diffuse Reflectance Infrared Fourier Transmissive Spectroscopy
  • DRIFTS Diffuse Reflectance Infrared Fourier Transmissive Spectroscopy
  • the amount of platinum or platinum and palladium supported on the refractory carrier material is 0.5 to 10 wt .-%, preferably 1 to 5 wt .-%, each based on the component (i).
  • Component (i) platinum and palladium platinum and palladium.
  • the amount of palladium is selected to give a weight ratio Pt: Pd of 1: 1 to 20: 1.
  • component (i) on which the platinum or platinum and palladium are supported
  • all materials familiar to the person skilled in the art for this purpose come into consideration.
  • Such materials have a BET surface area of 30 to 250 m 2 / g, preferably from 100 to 200 m 2 / g (determined according to DIN 66132) and are in particular Alumina, silica, magnesia, titania, ceria, zeolite, and mixtures or mixed oxides thereof.
  • the assignment of the refractory support with platinum or palladium is carried out by known methods, for example by the "incipient-wetness” method using water-soluble platinum or palladium compounds.
  • ceria is
  • the BET value (determined according to DIN 66132) is fresh, that is not aged, cerium oxide, in particular at values of> 90 m 2 / g.
  • ceria is in the form of a dopant or mixed oxide with, for example, zirconium oxide, aluminum oxide, lanthanum oxide and / or praseodymium oxide.
  • the proportion of cerium oxide in the doped form or in the mixed oxide is in particular 80 to 99 wt.%.
  • the amount of cerium oxide in the catalyst according to the invention is the amount of cerium oxide.
  • the catalyst according to the invention shows the described DRIFTS peaks after reductive treatment at 250.degree.
  • this treatment is carried out by three 5 second long fuel pulses with a
  • Diffuse Reflectance Infrared Fourier Transmissive Spectroscopy has been extensively described in the literature and known to those skilled in the art, see, for example, Catalysis Today 155 (2010) 164-171 and Catalysis Today 68 (2001) 263-381.
  • IR radiation is focused by means of a mirror on a powdery sample of the substance to be measured, whereby it by interaction with the sample to a superposition of reflection, diffraction, refraction,
  • the formation of formate species on the surface of the catalyst samples after reductive treatment at 250 ° C and adsorption of CO via DRIFTS was observed.
  • the catalyst according to the invention contains a NOx storage component, in particular an alkali or
  • Alkaline earth compound for example, barium oxide or strontium oxide is.
  • the NOx storage component is used in particular in amounts of 5 to 50 g / l, based on the volume of the support body. It is also usually supported on a high surface area refractory oxide than, for example, alumina, magnesium oxide and homogeneous magnesium / aluminum mixed oxide can be used.
  • the storage component may also be supported on ceria or a cerium mixed oxide.
  • the catalyst according to the invention can be obtained in a simple manner by mixing its constituents and applying it to a carrier body in the form of a washcoat.
  • catalysts show the claimed peaks with the claimed ratios of the peak heights, when at a constant amount of platinum, the ratio of the amount of cerium oxide to the amount of palladium is large.
  • Diesel engine exhaust can be used. Very particular preference is given to ceramic flow honeycomb bodies and ceramic wall flow filter substrates made of cordierite, aluminum titanate or silicon carbide.
  • the coating of the support body with the catalyst according to the invention is carried out in a known manner, in particular by the fact that a
  • washcoat which are the components of the
  • inventive catalyst or precursors thereof applied to the support body and then dried and calcined.
  • the application can be carried out by known methods, such as dipping, suction and / or pumping.
  • a washcoat for coating a support body with the catalyst according to the invention is preferably an aqueous one
  • Suspension in addition to optionally required auxiliaries with platinum and / or palladium-coated refractory carrier material (component (i)), cerium oxide (component (ii)), and optionally contains a NOx storage component.
  • the catalyst according to the invention can be operated in a known manner alone or as part of a catalyst system for removing carbon monoxide and hydrocarbon from the exhaust gas
  • the present invention thus also relates to a process for removing carbon monoxide and hydrocarbon from the exhaust gas of lean-burn internal combustion engines, which is characterized in that the exhaust gas is passed over a catalyst according to the invention.
  • the catalysts studied in the following examples consist of different components. These components were respectively made into an aqueous coating dispersion were coated with the flow-through honeycomb body of cordierite with a cell density of 62 cm "2 (number of flow channels of the honeycomb body per unit cross-sectional area) using a dipping process. The coated honeycombs were dried and then at 500 Calcined for a period of 2 hours in air The CO light-off behavior of the final catalysts thus obtained was after synthetic aging in a
  • the specimens were heated in the exhaust gas composition "conditioning 1" at a heating rate of 7.5 ° C per minute to 550 ° C and then again cooled to 80 ° C.
  • c (CO) is the concentration of CO at the catalyst inlet
  • condition 2 hereinafter also referred to as reductive treatment, consisting of a 200 second “lean” phase followed by a 5 second long "fat” phase exists.
  • the catalyst samples were first ground.
  • N2 was used as the inert gas, the total volume flow through the DRIFTS cell always being 6 L h -1 .
  • the milled catalyst sample in the DRIFTS cell was rinsed with 10% CO for 2 minutes at 25 ° C , then treated with 10% H2 for 10 minutes at 250 ° C., then the cell is metered for 6 minutes at 25 ° C. with 10% CO 2, and finally flushed again with N 2 for 6 minutes at 25 ° C.
  • the comparative catalyst VK1 thus prepared contained 100 g / cft of 3 platinum.
  • Example 2 (example catalyst K2)
  • a Pt-based oxidation catalyst To prepare a Pt-based oxidation catalyst, a high surface area commercial cerium oxide having a cerium oxide content of 100% by weight and lanthanum stabilized alumina having 3% by weight La 2 C> 3 based on the total weight of the mixed oxide previously described in US Pat. incipient wetness method with platinum from platinum-tetraamine acetate, was mixed with water to form a suspension, to which suspension was additionally injected palladium as Pd nitrate
  • Cordierite honeycomb body with a cell density of 62 cm "1 is coated with this suspension by means of a dipping process
  • Example 3 (example catalyst K3)
  • a catalyst was prepared which, instead of the cerium oxide with a cerium oxide content of 100% by weight, contained a commercially available doped cerium oxide with a cerium oxide content of 85% by weight. As stabilizers, the cerium oxide contained in each case 5% by weight of lanthanum oxide,
  • Praseodymium oxide and alumina Praseodymium oxide and alumina.
  • Example 2 In analogy to Example 2, another catalyst was prepared which contained another commercially available doped ceria having a cerium oxide content of 85 wt .-%, which was stabilized with 5 wt .-% lanthanum oxide, praseodymium oxide and silica.
  • Figure 1 shows the CO conversion of example catalyst Kl and
  • condition 1 Pretreatments in oxidizing atmosphere (conditioning 1, thin line) at temperatures up to 500 ° C and after pretreatment with 3 times reducing atmosphere (conditioning 2, thick line) for 5s at 250 ° C. While the CO conversion behavior of VK1 is relatively independent of the pretreatment, the CO conversion activity of
  • Example catalyst Kl significantly increased by pretreatment in a reducing atmosphere, ie. the temperature Tgo, at which the conversion reaches 90%, drops to 98 ° C.
  • DRIFTS measurements are the catalysts Kl and VK1 1 after adsorption of CO in the range of 3000 (Diffuse Reflectance Infrared Fourier Transform Spectroscopy) - shown in 2600 cm "1, corresponding to the formation of formate species at the surface, while. If no peaks are formed in both catalysts after oxidative pretreatment (light curves), the spectra are clearly different after reductive pretreatment (dark curves), whereas in the case of comparative catalyst VK1 no formate species are formed (only one peak at 2906 cm -1 wavenumbers can be seen), the peaks at the wavenumbers 2879 cm “1 and 2847 cm “ 1 for example catalyst 1 show the presence of reactive centers.
  • Example catalysts K2 and K3, and the comparative catalyst VK2 shown Although all catalysts have a similar composition, there are clearly differences in the conversion after reductive pretreatment. Thus, the Tgo value for K2 and K3 is 85 ° C and 140 ° C, respectively, while the Tgo value for VK2 is 215 ° C.
  • the associated DRIFTS spectra after reductive pretreatment and CO adsorption are shown in FIG. (The curves of the fresh samples are also included here.) Must be removed then
  • VK2 ⁇ 0.005 ⁇ 0.005 ⁇ 0.005 - - 220

Landscapes

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

Abstract

La présente invention concerne un catalyseur qui permet d'éliminer le monoxyde de carbone et les hydrocarbures présents dans les gaz d'échappement de moteurs à combustion interne à mélange pauvre. Ce catalyseur est situé sur un corps de support qui contient du platine et/ou du palladium portés sur un ou plusieurs matériaux de support réfractaires, et du céroxyde, et qui, après un traitement réducteur à 250°C et après l'adsorption de CO, est caractérisé par certains pics dans la spectroscopie infrarouge à transformée de Fourier par réflexion diffuse (DRIFTS). La présente invention concerne également l'utilisation de ce catalyseur pour éliminer le monoxyde de carbone et les hydrocarbures présents dans les gaz d'échappement de moteurs à combustion interne à mélange pauvre.
EP14786682.6A 2013-10-22 2014-10-22 Catalyseur pour l'oxydation de co et de hc à faibles températures Withdrawn EP3060330A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310221423 DE102013221423A1 (de) 2013-10-22 2013-10-22 Katalysator zur Oxidation von CO und HC bei niedrigen Temperaturen
PCT/EP2014/072589 WO2015059164A1 (fr) 2013-10-22 2014-10-22 Catalyseur pour l'oxydation de co et de hc à faibles températures

Publications (1)

Publication Number Publication Date
EP3060330A1 true EP3060330A1 (fr) 2016-08-31

Family

ID=51753232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14786682.6A Withdrawn EP3060330A1 (fr) 2013-10-22 2014-10-22 Catalyseur pour l'oxydation de co et de hc à faibles températures

Country Status (7)

Country Link
US (1) US9757712B2 (fr)
EP (1) EP3060330A1 (fr)
JP (1) JP2016535671A (fr)
KR (1) KR20160077115A (fr)
CN (1) CN105636673A (fr)
DE (1) DE102013221423A1 (fr)
WO (1) WO2015059164A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10898889B2 (en) * 2018-01-23 2021-01-26 Umicore Ag & Co. Kg SCR catalyst and exhaust gas cleaning system
US20200030776A1 (en) * 2018-07-27 2020-01-30 Johnson Matthey Public Limited Company Twc catalysts containing high dopant support
CN109092304B (zh) * 2018-08-07 2021-11-26 广东工业大学 一种Pt基催化剂及其制备方法和应用
EP3815780B1 (fr) * 2019-10-30 2024-06-19 Umicore AG & Co. KG Catalyseur d'oxydation diesel
CN111957342B (zh) * 2020-07-08 2022-03-25 华南理工大学 一种低温去除柴油车尾气氮氧化物的小孔分子筛负载双金属材料及其制备方法与应用

Family Cites Families (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5123958B1 (fr) * 1970-11-21 1976-07-20
DE2412176A1 (de) * 1974-03-14 1975-10-16 Hoechst Ag Verfahren zur oxidation von kohlenmonoxid und kohlenwasserstoffen
DE3137169A1 (de) * 1981-09-18 1983-03-31 Degussa Ag, 6000 Frankfurt Katalysator fuer die verbrennung von in abgasen alkoholbetriebener verbrennungskraftmaschinen enthaltenen schadstoffen, verfahren zur herstellung des katalysators und verwendung
US4469816A (en) * 1982-12-14 1984-09-04 Allied Corporation Palladium on alumina aerogel catalyst composition and process for making same
CA2011484C (fr) * 1989-04-19 1997-03-04 Joseph C. Dettling Catalyseur au platine, comportant palladium et support cerium, et groupe catalyseur connexe
JP2909553B2 (ja) 1989-10-18 1999-06-23 トヨタ自動車株式会社 排気ガス浄化用触媒及び排気ガスの浄化方法
DE3940758A1 (de) 1989-12-09 1991-06-13 Degussa Verfahren zur reinigung der abgase von dieselmotoren
US5179060A (en) * 1990-11-28 1993-01-12 Ford Motor Company Dispersion enhanced pt group metal catalysts and method of making the catalysts
JPH0729055B2 (ja) * 1990-12-29 1995-04-05 エヌ・イーケムキャット株式会社 含炭素化合物を酸化するための触媒およびその製造方法
JP3272015B2 (ja) * 1992-02-07 2002-04-08 株式会社日本触媒 排気ガス浄化用触媒
JP2755513B2 (ja) * 1992-02-28 1998-05-20 株式会社日本触媒 排気ガス浄化用触媒
JP3411942B2 (ja) 1993-09-30 2003-06-03 マツダ株式会社 排気ガス浄化用のｈｃ吸着剤、排気ガス浄化用触媒及び排気ガス浄化装置
US6044644A (en) * 1994-12-06 2000-04-04 Engelhard Corporation Close coupled catalyst
DE19614540A1 (de) 1996-04-12 1997-10-16 Degussa Dieselkatalysator
DE19753738A1 (de) 1997-12-04 1999-06-10 Degussa Verfahren zur Herstellung eines Katalysators
DE19908394A1 (de) * 1999-02-26 2000-08-31 Degussa Katalysatormaterial und Verfahren zu seiner Herstellung
US6709643B1 (en) * 2000-11-10 2004-03-23 The Ohio State University Catalyst and method of use in the reduction of nitrogen oxides using lower hydrocarbons
JP4019357B2 (ja) * 2002-05-02 2007-12-12 日産自動車株式会社 排気ガス浄化用触媒粉末の製造方法及び排気ガス浄化触媒の製造方法
DE10308288B4 (de) 2003-02-26 2006-09-28 Umicore Ag & Co. Kg Verfahren zur Entfernung von Stickoxiden aus dem Abgas eines mager betriebenen Verbrennungsmotors und Abgasreinigungsanlage hierzu
JP2005021880A (ja) * 2003-06-13 2005-01-27 Nissan Motor Co Ltd 排ガス浄化用触媒及び排ガス浄化用触媒システム
DE502007002874D1 (de) * 2007-09-28 2010-04-01 Umicore Ag & Co Kg Entfernung von Partikeln aus dem Abgas von mit überwiegend stöchiometrischem Luft/Kraftstoff-Gemisch betriebenen Verbrennungsmotoren
US8771624B2 (en) * 2008-03-19 2014-07-08 Umicore Shokubai Japan Co., Ltd Catalyst for purifying exhaust gas from internal combustion engine and process for purifying exhaust gas using the same
US8828343B2 (en) * 2010-03-05 2014-09-09 Basf Corporation Carbon monoxide conversion catalyst
US8617496B2 (en) * 2011-01-19 2013-12-31 Basf Corporation Three way conversion catalyst with alumina-free rhodium layer
WO2012121085A1 (fr) * 2011-03-04 2012-09-13 株式会社アイシーティー Catalyseur pour la purification de gaz d'échappement, procédé pour sa production et procédé de purification de gaz d'échappement l'utilisant
JP5938819B2 (ja) * 2011-10-06 2016-06-22 ジョンソン、マッセイ、パブリック、リミテッド、カンパニーＪｏｈｎｓｏｎ Ｍａｔｔｈｅｙ Ｐｕｂｌｉｃ Ｌｉｍｉｔｅｄ Ｃｏｍｐａｎｙ 排気ガス処理用酸化触媒
GB2497597A (en) * 2011-12-12 2013-06-19 Johnson Matthey Plc A Catalysed Substrate Monolith with Two Wash-Coats
JP6174115B2 (ja) 2012-04-05 2017-08-02 ユミコア アクチェンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフト 希薄燃焼内燃機関の排ガスから一酸化炭素および炭化水素を除去するための方法
US8679434B1 (en) * 2013-01-28 2014-03-25 Basf Corporation Catalytic articles, systems and methods for the oxidation of nitric oxide

Also Published As

Publication number Publication date
CN105636673A (zh) 2016-06-01
KR20160077115A (ko) 2016-07-01
WO2015059164A1 (fr) 2015-04-30
US20160236180A1 (en) 2016-08-18
US9757712B2 (en) 2017-09-12
DE102013221423A1 (de) 2015-04-23
JP2016535671A (ja) 2016-11-17

Similar Documents

Publication Publication Date Title
DE102012222801B4 (de) Abgassystem und Verwendung einer Washcoatbeschichtung
DE102015100986B4 (de) Abgassystem mit Dieseloxidationskatalysator
EP3177400B1 (fr) Catalyseur destiné à la réduction d'oxyde d'azote et un procédé de réduction des nox
DE102012222804B4 (de) Abgassystem mit Substratmonolith, der einen SCR-Katalysator umfasst
EP1911506B1 (fr) Catalyseur accumulateur de NOx avec une température de désulfuration réduite
DE102009043210B4 (de) Verfahren und Architektur zum Oxidieren von Stickoxid in Abgas von einer Kohlenwasserstoffkraftstoffquelle mit einem kraftstoffarmen Verbrennungsgemisch
DE112016005997T5 (de) Benzinpartikelfilter
DE102016118542A1 (de) Einen russkatalysator und einen scr-katalysator aufweisendes katalytisches filter
DE102014105736A1 (de) Motor mit Fremdzündung und Abgassystem, das ein katalysiertes in Zonen beschichtetes Filtersubstrat umfasst
DE112016004452T5 (de) Benzinpartikelfilter
DE112012002601T5 (de) Katalysiertes Substrat und Abgassystem für Verbrennungsmotoren
DE102012209204B4 (de) Oxidationskatalysator aus nichtstöchiometrischem Perowskitoxid zum Oxidieren von NO zu NO2 in einem Abgasnachbehandlungssystem und Verfahren
DE112011103996T5 (de) Metall-enthaltender Zeolithkatalysator
DE202007019493U1 (de) NOx-Speichermaterialien und -Fallen, die gegenüber Wärmealterung beständig sind
DE102014102023A1 (de) Oxidationskatalysator für einen verbrennungsmotor
DE102012222806A1 (de) Abgassystem für einen mager verbrennenden Verbrennungsmotor, das eine PGM-Komponente und einen SCR-Katalysator umfasst
DE102012208008A1 (de) Oxidationskatalysatoren für Niedertemperatur-Abgasströme produzierende Motoren
EP3060330A1 (fr) Catalyseur pour l'oxydation de co et de hc à faibles températures
DE102011120869A1 (de) Verfahren zur Zubereitung von perowskitoxidbasierten Katalysatorpartikeln
DE102016219132A1 (de) Niedertemperatur-Oxidationskatalysatoren
DE102010056223A1 (de) Abgassystem für einen Fahrzeugverbrennungsmotor mit Fremdzündung
WO2014128236A1 (fr) Catalyseur et procédé de réduction d'oxydes d'azote
DE102016101761A1 (de) Katalysator zur Reduktion von Stickoxiden
WO2017191099A1 (fr) Catalyseur d'oxydation pour moteurs diesel à trois zones
DE102013210557A1 (de) Katalysatorzusammensetzung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20160523

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17Q First examination report despatched

Effective date: 20161117

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170328