EP2635372A1 - CATALYSEUR D'OXYDATION DE L'AMMONIAC AVEC UNE FAIBLE FORMATION DE SOUS-PRODUIT N2O& xA; - Google Patents

CATALYSEUR D'OXYDATION DE L'AMMONIAC AVEC UNE FAIBLE FORMATION DE SOUS-PRODUIT N2O& xA;

Info

Publication number
EP2635372A1
EP2635372A1 EP11779617.7A EP11779617A EP2635372A1 EP 2635372 A1 EP2635372 A1 EP 2635372A1 EP 11779617 A EP11779617 A EP 11779617A EP 2635372 A1 EP2635372 A1 EP 2635372A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
catalytic composition
mixed oxide
platinum
scr
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Withdrawn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
EP11779617.7A
Other languages
German (de)
English (en)
Inventor
Markus Reichinger
Gerd Maletz
Klaus Wanninger
Andreas Bentele
Martin Schneider
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.)
Clariant Produkte Deutschland GmbH
Original Assignee
Clariant Produkte Deutschland GmbH
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 Clariant Produkte Deutschland GmbH filed Critical Clariant Produkte Deutschland GmbH
Publication of EP2635372A1 publication Critical patent/EP2635372A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • 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
    • 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
    • B01J23/002—Mixed oxides other than spinels, e.g. perovskite
    • 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
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/652—Chromium, molybdenum or tungsten
    • B01J23/6527—Tungsten
    • 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
    • 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
    • B01J37/0228—Coating 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
    • B01J37/0242—Coating followed by impregnation
    • 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
    • B01D2255/20—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
    • B01D2255/407—Zr-Ce mixed oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • 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
    • B01D53/9459—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
    • 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 [3D] monoliths
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)

Definitions

  • the present invention relates to a catalytic
  • a composition comprising a noble metal on an acidic tungsten-containing mixed oxide, a process for the preparation of the catalytic composition and the use of the
  • the invention is further based on a shaped catalyst body
  • SCR selective catalytic reduction
  • Urea used for exhaust aftertreatment usually, a urea solution is atomized into the exhaust stream. The urea is hydrolyzed to ammonia and the
  • the oxidation of the ammonia proceeds very rapidly and therefore this reaction can be used to prevent the residual emissions of ammonia after the SCR.
  • the catalyst has a high selectivity to N 2 and produces little NO, NO 2 and N 2 O (nitrous oxide).
  • N 2 O as a by-product is not legally limited, low N 2 O emissions are still important, because N 2 O is one of the greenhouse gases and thus has a climate-damaging effect.
  • Nitrous oxide is classified as having a GWP (Global Warming Potential) of 310, which means that the amount of nitrous oxide in the atmosphere is 310 times greater in terms of global warming
  • EP 410440 Bl discloses a V / W / Ti solid extrudate SCR catalyst which is coated in its exit zone with a noble metal.
  • EP 544282 B1 discloses a catalyst comprising a combination of a V / W / Ti catalyst and platinum on a zeolite, or platinum on alumina or platinum on S1O 2 . Here a very low platinum concentration is used. In this document it is shown that a pure Pt / mordenite catalyst without V / W / Ti component (see
  • Comparative Example 2 shows a negative NO x conversion, ie ammonia partially oxidized back to NO x , whereas a pure V / W / Ti catalyst has a high ammonia slip. Only the combination of both catalysts shows both a high selectivity to N 2 and a low
  • EP 1 399 246 B1 discloses a monolith catalyst having a V / W / Ti based SCR component which is based on its
  • VWT-SCR catalytically active material of the reduction catalyst
  • the platinum is thus applied directly to the V / W / Ti catalyst and not mixed two catalysts as in EP 544282 Bl.
  • Ammonia from exhaust gases wherein the gas is added ammonia and after an SCR the gas is passed over an oxidation catalyst comprising a noble metal and vanadium on a Ti0 2 or A1 2 0 3, Si0 2, Zr0 2, Al-Si oxide, MgO, Hf0 2 or La 2 0 3 support includes. This is therefore also a
  • Component with activity to form nitrogen oxides from ammonia for example via a noble metal.
  • acidic tungsten-containing oxides are also suitable for the SCR reaction.
  • acidic tungsten-containing oxides are also suitable for the SCR reaction.
  • W / Ce / Zr mixed oxides see SAE 2007-01-0238, WO 2009/001131 and US 2010/0034717).
  • EP 7597865 also discloses the use of similar acidic Ce / Zr / Ti sulfate catalysts and Ti / Zr / Ce / W-SCR catalysts, respectively, followed by a barrier catalyst comprising platinum on a Si / Al oxide.
  • Oxidation catalysts oxidize ammonia to both NO x and N 2 O. These oxidation reactions are very fast.
  • the aim of ammonia oxidation in the barrier catalyst is the oxidation to nitrogen.
  • the object of the present invention was therefore to provide a catalytic composition which is suitable as an ammonia oxidation catalyst and a particularly high selectivity for the ammonia oxidation
  • Composition containing a noble metal on an acidic tungsten-containing mixed oxide has a particularly high selectivity for the ammonia oxidation and only at higher
  • this is acidic
  • Tungsten-containing mixed oxide preferably a Ce / Zr / W mixed oxide, a Y-stabilized Zr / W mixed oxide (Y / Zr / W mixed oxide) or a Ce / Zr / Ti / W mixed oxide, particularly preferably a Ce / Zr / W
  • the mixed oxide preferably has a tungsten content of 5 to 15 wt .-%, more preferably 5.5 to 10 wt .-% and most preferably 6 to 7 wt .-% tungsten, based on the total
  • the noble metal is preferably platinum.
  • Mixed oxide preferably has 0.05 to 1 wt .-% platinum, more preferably 0.06 to 0.75 wt .-% platinum and most preferably 0.07 to 0.5 wt .-% platinum, based on the total Mixed oxide, on.
  • no other precious metal is present in the catalytic composition besides platinum.
  • the ratio Ce / Zr in the acidic tungsten-containing mixed oxide is preferably in the range of 80:20 to 50:50, more preferably 60:40 to 70:30, still more preferably 65:35. As a result, a precisely matched acidic character of the mixed oxide is obtained, which contributes to the selectivity increase.
  • the invention also provides a method for
  • a composition comprising the steps of: a) impregnating an acidic mixed oxide with a
  • Tungsten precursor compound Tungsten precursor compound
  • step b) impregnating the calcined mixed oxide from step b) with a noble metal precursor compound
  • the mixed oxide used for example a Ce / Zr mixed oxide used according to the invention, and also the W mixed oxide produced have preferably a BET surface area of 20-250 m 2 / g, preferably 40-100 m 2 / g, most preferably SOSO m 2 / g.
  • the BET surface area is determined according to DIN 66132 (according to the method of Brunauer, Emmet and Teller).
  • tungsten precursor compound is in principle any tungsten compound, which converts under the action of temperature in the calcination in the corresponding oxide, preferably ammonium metatungstate (NH 4 ) 6 H 2 Wi 2 0 4 o, ammonium tungstate (NH 4 ) i 9 H 2 (W 2 0 7 ) 6 and tungstic acid H 2 W0 4 .
  • ammonium metatungstate NH 4 ) 6 H 2 Wi 2 0 4 o
  • ammonium tungstate NH 4 ) i 9 H 2 (W 2 0 7 ) 6
  • tungstic acid H 2 W0 4 is particularly preferred as the tungsten precursor compound.
  • ammonium metatungstate ammonium metatungstate
  • Tungsten precursor compound is a whisker, preferably at a temperature of 400 to 800 ° C, more preferably 500 to 600 ° C, most preferably at about
  • Mixed oxide which is preferably a ternary mixed oxide.
  • Impregnation is preferably by the incipient wetness method, but other methods, e.g. Dipping,
  • Spray method and the like can be used.
  • Suitable noble metal precursor compounds are, for example, ethanolammonium hexahydroxoplatinate, hexachloroplatinic acid, tetrachloroplatinic acid, diaminedinitroplatinate (II),
  • Methylethanolamine platinum (I) hydroxide and platinum nitrate with ethanol ammonium hexahydroxoplatinate being most preferred.
  • Calcining step preferably at a temperature between 400 and 800 ° C, more preferably between 500 and 600 ° C, most preferably at about 550 ° C, whereby preferably finely divided noble metal is deposited on the mixed oxide.
  • the particle size of the deposited noble metal is preferred
  • Determination of particle size can be determined by transmission electron microscopy (TEM).
  • Calcination may optionally also take place a drying step, for example at temperatures of 50 to 200 ° C, preferably 80 to 150 ° C.
  • Another object of the invention is the use of the catalytic composition, as described above or as prepared by the method described above, as
  • Oxidation catalyst in particular as ammonia oxidation catalyst.
  • the catalytic composition is preferably used together with an SCR catalyst.
  • the SCR catalyst is preferably arranged upstream of the catalytic composition according to the invention in the flow direction.
  • the catalytic composition (oxidation catalyst) and the SCR catalyst in a single catalyst component
  • the component and the composition according to the invention can be accommodated on separate carriers in two separate components.
  • the SCR catalyst may be, for example, an SCR active
  • the catalytic composition can become a washcoat
  • the washcoat is suitable for producing a coated catalyst shaped body.
  • Another object is accordingly a catalyst shaped body containing a carrier and the catalytic composition as described above.
  • the catalytic composition is at least partially applied as a coating on the carrier, more preferably, the coating is applied to the entire carrier surface.
  • the necessary coating techniques are known to the person skilled in the art.
  • the catalytic composition is processed into an aqueous coating dispersion. This dispersion may be added as a binder, for example, silica sol.
  • the viscosity of the dispersion can be adjusted by suitable additives, so that it is possible to apply the required coating amount, for example, in a single operation on the walls of flow channels. If this is not possible, then the coating be repeated several times, the freshly applied coating is fixed in each case by an intermediate drying. The finished coating is then dried at elevated temperature and calcined for a period of 1 to 4 hours at temperatures between 300 and 600 ° C.
  • the catalytic composition can also be added with the addition of suitable auxiliaries such as inorganic binders (e.g.
  • the catalytic composition is preferably in the form of a
  • the carrier is thus a metallic or
  • ceramic support more preferably a so-called
  • the support material is preferably either a ceramic such as cordierite or a metal or alloy (Emitec).
  • metallic foams Inco can be used as the carrier.
  • the shaped catalyst body is installed in a housing having an inlet and outlet opening for an exhaust gas to be cleaned.
  • the invention is therefore also a
  • the catalyst component may be part of an exhaust gas purification system, preferably further
  • Components such as a particulate filter, a upstream oxidation catalyst, a
  • Fig. 1 shows the ammonia conversion of the compound according to the invention in comparison with not inventive
  • Ammonia light-off temperature can be determined.
  • the invention is based on the example 1 and the
  • the honeycombs are all 1 "in diameter and 2" in length.
  • Comparative Example 1 becomes a catalyst based on
  • Example 3 a catalyst based on Pt is prepared on a V / W / Ti-SCR catalyst.
  • Example 4 describes the comparison test.
  • V 25.3 ml coated with 6.425 g washcoat.
  • honeycomb Water amount of water absorption are included.
  • the honeycomb is then completely immersed in a platinum inethanolamine solution of this concentration for 10 seconds, in this way via "incipient wetness". impregnated.
  • the honeycomb is dried and calcined at 550 ° C.
  • a washcoat of 20 kg DT 51D titanium dioxide from Milenium and 26 kg titanium dioxide sol (12%, nitric acid stabilized) from Sachtleben as binder are prepared.
  • a honeycomb is coated to 32 g / 1 washcoat and calcined at 450 ° C.
  • honeycomb Water amount of water absorption are included.
  • the honeycomb is then completely immersed in a platinum ethanolamine solution of this concentration for 10 seconds and impregnated in this way by means of incipient wetness, and the honeycomb is dried at 550.degree
  • a washcoat of Fe-BEA zeolite is made to which a colloidal silica sol is added as a binder.
  • Ceramic honeycomb is coated to 250 g / 1 washcoat and calcined at 550 ° C.
  • honeycomb Water amount of water absorption are included.
  • the honeycomb is then completely immersed in a platinum ethanolamine solution of this concentration for 10 seconds and impregnated in this way by means of incipient wetness, and the honeycomb is dried at 550.degree
  • a washcoat of W stabilized titania DT 52 and 2.5% V 2 O 5 is prepared.
  • a ceramic honeycomb is coated to 200 g / 1 washcoat and calcined at 450 ° C.
  • honeycomb Water amount of water absorption are included.
  • the honeycomb is then completely immersed for 10 s in a platinum ethanolamine solution of this concentration and impregnated in this way via "incipient wetness".
  • the honeycomb is dried and at 450 ° C
  • the catalysts were tested in a glass tube reactor (internal diameter 27 mm) under the following conditions:
  • Catalysts other than the catalyst containing no SCR component (TiO 2 , Comparative Example 1) meet this requirement.
  • Ammonia is formed by ammonia oxidation. At low temperature, the reaction is selective, as it dominates the SCR function. As the temperature increases, the oxidation becomes so fast that more ammonia is readily oxidized before it enters the SCR can selectively react with the NO x . The higher this temperature, at which this negative NO x conversion, ie more ammonia oxidation to NO x , takes place, the better is the
  • N 2 O Outlet concentration in ppm shown.
  • N 2 O is an undesirable by-product. It can be clearly seen that the catalyst according to the invention (squares) only exceeds the 5 ppm N 2 O at 250 ° C., ie N 2 O forms only at a higher temperature and with a maximum of 20 ppm at 300 ° C. the lowest N 2 0 Having formation.

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  • 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)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne une composition catalytique comprenant un métal noble sur un oxyde mixte acide contenant du tungstène, un procédé pour la fabrication de la composition catalytique et l'utilisation de la composition catalytique en tant que catalyseur d'oxydation. La présente invention concerne en outre un corps moulé de catalyseur, qui comprend la composition catalytique sur un support, un washcoat contenant la composition catalytique selon la présente invention et l'utilisation du washcoat pour la fabrication d'un corps moulé de catalyseur revêtu.
EP11779617.7A 2010-11-03 2011-10-28 CATALYSEUR D'OXYDATION DE L'AMMONIAC AVEC UNE FAIBLE FORMATION DE SOUS-PRODUIT N2O& xA; Withdrawn EP2635372A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010050312A DE102010050312A1 (de) 2010-11-03 2010-11-03 Ammoniak-Oxidationskatalysator mit geringer N2O Nebenproduktbildung
PCT/EP2011/068976 WO2012059423A1 (fr) 2010-11-03 2011-10-28 Catalyseur d'oxydation de l'ammoniac avec une faible formation de sous-produit n2o

Publications (1)

Publication Number Publication Date
EP2635372A1 true EP2635372A1 (fr) 2013-09-11

Family

ID=44913261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779617.7A Withdrawn EP2635372A1 (fr) 2010-11-03 2011-10-28 CATALYSEUR D'OXYDATION DE L'AMMONIAC AVEC UNE FAIBLE FORMATION DE SOUS-PRODUIT N2O& xA;

Country Status (5)

Country Link
US (1) US9573097B2 (fr)
EP (1) EP2635372A1 (fr)
CN (1) CN103459013B (fr)
DE (1) DE102010050312A1 (fr)
WO (1) WO2012059423A1 (fr)

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JP5732297B2 (ja) * 2011-03-31 2015-06-10 エヌ・イーケムキャット株式会社 アンモニア酸化触媒、および排気ガス浄化装置並びに排気ガス浄化方法
EP2878368B1 (fr) * 2013-11-29 2019-05-22 Umicore Ag & Co. Kg Matériau de stockage de l'oxygène
EP2878359B1 (fr) * 2013-11-29 2016-04-13 Umicore Ag & Co. Kg Utilisation d'oxydes mixtes comme composants de stockage d'oxygène
US8883102B1 (en) * 2014-01-14 2014-11-11 Ford Global Technologies, Llc Methods for controlling nitrous oxide emissions
US10273851B2 (en) 2014-02-28 2019-04-30 Scania Cv Ab Exhaust treatment system and method for treatment of an exhaust stream
SE539803C2 (en) 2015-06-05 2017-12-05 Scania Cv Ab A method and a system for determining a composition of a gas mix in a vehicle
SE539131C2 (sv) 2015-08-27 2017-04-11 Scania Cv Ab Förfarande och avgasbehandlingssystem för behandling av en avgasström
SE539129C2 (en) 2015-08-27 2017-04-11 Scania Cv Ab Process and system for processing a single stream combustion exhaust stream
EP3341596B1 (fr) 2015-08-27 2021-07-28 Scania CV AB Procédé et système de traitement d'échappement pour traitement d'un courant de gaz d'échappement
SE539133C2 (sv) 2015-08-27 2017-04-11 Scania Cv Ab Avgasbehandlingssystem och förfarande för behandling av en avgasström
SE539130C2 (sv) 2015-08-27 2017-04-11 Scania Cv Ab Förfarande och avgasbehandlingssystem för behandling av en avgasström
SE539134C2 (sv) 2015-08-27 2017-04-11 Scania Cv Ab Avgasbehandlingssystem och förfarande för behandling av en avgasström
JP7342031B2 (ja) * 2018-04-23 2023-09-11 ビーエーエスエフ コーポレーション ディーゼルエンジン排気ガス処理用の選択的接触還元触媒
CN111135827A (zh) * 2020-01-08 2020-05-12 中自环保科技股份有限公司 一种用于当量燃烧天然气发动机尾气的氨氧化催化剂及其制备方法
DE102020207311B4 (de) 2020-06-11 2022-09-08 Volkswagen Aktiengesellschaft Ammoniak-Sperrkatalysator, Abgasnachbehandlungssystem und Verfahren zur Abgasnachbehandlung

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DE102010050312A1 (de) 2012-05-03
US9573097B2 (en) 2017-02-21
CN103459013B (zh) 2016-08-31
WO2012059423A1 (fr) 2012-05-10
CN103459013A (zh) 2013-12-18

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