SG11201500315RA - CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT - Google Patents

CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT

Info

Publication number
SG11201500315RA
SG11201500315RA SG11201500315RA SG11201500315RA SG11201500315RA SG 11201500315R A SG11201500315R A SG 11201500315RA SG 11201500315R A SG11201500315R A SG 11201500315RA SG 11201500315R A SG11201500315R A SG 11201500315RA SG 11201500315R A SG11201500315R A SG 11201500315RA
Authority
SG
Singapore
Prior art keywords
reductant
acetaldehyde
nox
catalytic reduction
high activity
Prior art date
Application number
SG11201500315RA
Inventor
Ajit B Dandekar
Richard L Eckes
Richard F Socha
S Beau Waldrup
Jason M Mcmullan
Original Assignee
Exxonmobil Res & Eng Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxonmobil Res & Eng Co filed Critical Exxonmobil Res & Eng Co
Publication of SG11201500315RA publication Critical patent/SG11201500315RA/en

Links

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
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • 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
    • B01D53/9431—Processes characterised by a specific device
    • 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
    • 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
    • B01J23/462—Ruthenium
    • 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
    • B01J23/74—Iron group metals
    • B01J23/75—Cobalt
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/084—Y-type faujasite
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7007—Zeolite Beta
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7015—CHA-type, e.g. Chabazite, LZ-218
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7026—MFS-type, e.g. ZSM-57
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/703—MRE-type, e.g. ZSM-48
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7034—MTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/7038—MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Toxicology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
SG11201500315RA 2012-08-09 2013-07-23 CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT SG11201500315RA (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261681281P 2012-08-09 2012-08-09
PCT/US2013/051652 WO2014025531A1 (en) 2012-08-09 2013-07-23 CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT

Publications (1)

Publication Number Publication Date
SG11201500315RA true SG11201500315RA (en) 2015-02-27

Family

ID=48949218

Family Applications (1)

Application Number Title Priority Date Filing Date
SG11201500315RA SG11201500315RA (en) 2012-08-09 2013-07-23 CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT

Country Status (7)

Country Link
US (1) US8795621B2 (en)
EP (1) EP2882522A1 (en)
CN (1) CN104519982A (en)
CA (1) CA2878257C (en)
IN (1) IN2014DN11249A (en)
SG (1) SG11201500315RA (en)
WO (1) WO2014025531A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107029749A (en) * 2017-05-08 2017-08-11 黑龙江大学 The preparation method and applications of cobaltosic oxide supported ruthenium catalyst, cobaltosic oxide supported ruthenium catalyst
US10920636B2 (en) 2017-11-09 2021-02-16 Exxonmobil Research And Engineering Company Treatment of combustion exhaust
CN115920589B (en) * 2022-12-21 2023-08-11 可迪尔空气技术（北京）有限公司 Treatment method of low-concentration sewage pool waste gas

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961020A (en) 1972-10-09 1976-06-01 Hitachi, Ltd. Process for removing sulfur oxides and nitrogen oxides from flue gases using halogen-impregnated actuated carbon with simultaneous injection of ammonia
US4210628A (en) 1973-07-12 1980-07-01 Takeda Chemical Industries, Ltd. Removal of nitrogen oxides
EP0077424A1 (en) 1981-10-21 1983-04-27 The Standard Oil Company Process for removing nitrogen oxides from a gas stream
US4783325A (en) * 1985-05-14 1988-11-08 Jones Dale G Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases
DE3620425C1 (en) 1986-06-18 1987-06-19 Bergwerksverband Gmbh Process for the production of an activated carbon catalyst
DE3710272C1 (en) 1987-03-28 1988-07-28 Bergwerksverband Gmbh Process for producing a carbon catalyst for NOx reduction with ammonia and its use
CA2079176A1 (en) 1991-10-07 1993-04-08 Clifford N. Montreuil Selective reduction of nox
US5589147A (en) 1994-07-07 1996-12-31 Mobil Oil Corporation Catalytic system for the reducton of nitrogen oxides
US5741468A (en) 1994-12-28 1998-04-21 Kabushiki Kaisha Riken Exhaust gas cleaner and method for cleaning exhaust gas
US6106791A (en) 1995-06-28 2000-08-22 Mitsubishi Jukogyo Kabushiki Kaisha Exhaust gas treating systems
US6127312A (en) 1995-10-02 2000-10-03 Osaka Gas Company Ltd. Heat-treated active carbons for use in denitration, processes for producing same denitration method using same, and denitration systems using same
US6346498B1 (en) 1997-12-19 2002-02-12 Exxonmobil Oil Corporation Zeolite catalysts having stabilized hydrogenation-dehydrogenation function
US6685897B1 (en) * 2000-01-06 2004-02-03 The Regents Of The University Of California Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures
WO2001074475A1 (en) 2000-04-03 2001-10-11 Basf Aktiengesellschaft Catalyst system for the decomposition of n2o
NL1017245C2 (en) 2001-01-31 2002-08-01 Stichting Energie Method for simultaneously removing nitrogen oxides and nitrous oxide from a gas stream containing nitrogen oxides and nitrous oxide.
US20030007901A1 (en) * 2001-07-03 2003-01-09 John Hoard Method and system for reduction of NOx in automotive vehicle exhaust systems
US7135153B2 (en) 2002-03-07 2006-11-14 Southwest Research Institute NOx reduction system for diesel engines, using hydrogen selective catalytic reduction
GB0206613D0 (en) * 2002-03-21 2002-05-01 Johnson Matthey Plc Exhaust system for an internal combustion engine
US7488462B2 (en) * 2005-04-26 2009-02-10 The Ohio State University Multi-stage catalyst systems and uses thereof
US7976697B2 (en) 2005-04-29 2011-07-12 W. R. Grace & Co.-Conn. NOX reduction compositions for use in partial burn FCC processes
US7743602B2 (en) 2005-06-21 2010-06-29 Exxonmobil Research And Engineering Co. Reformer assisted lean NOx catalyst aftertreatment system and method
US7803338B2 (en) 2005-06-21 2010-09-28 Exonmobil Research And Engineering Company Method and apparatus for combination catalyst for reduction of NOx in combustion products
US7396517B2 (en) * 2005-08-05 2008-07-08 Gm Global Technology Operations, Inc. Reduction of NOx emissions using a staged silver/alumina catalyst system
US7431905B2 (en) 2005-10-04 2008-10-07 General Electric Company Catalyst system and method for the reduction of NOx
US7891171B2 (en) 2006-12-05 2011-02-22 GM Global Technology Operations LLC Hybrid catalyst for NOx reduction using fuel hydrocarbons as reductant
US7767175B2 (en) 2007-01-09 2010-08-03 Catalytic Solutions, Inc. Ammonia SCR catalyst and method of using the catalyst
US8802582B2 (en) 2007-01-09 2014-08-12 Catalytic Solutions, Inc. High temperature ammonia SCR catalyst and method of using the catalyst
JP2008240698A (en) 2007-03-28 2008-10-09 Mitsubishi Electric Corp Exhaust emission control device
DE102008000890A1 (en) 2008-03-31 2009-10-01 Carbotech Ac Gmbh Activated carbon catalyst
US8353155B2 (en) 2009-08-31 2013-01-15 General Electric Company Catalyst and method of manufacture
JP5419772B2 (en) 2010-03-26 2014-02-19 日本碍子株式会社 Zeolite honeycomb structure
US8323602B2 (en) * 2010-07-08 2012-12-04 Air Products And Chemicals, Inc. Treatment of flue gas from an oxyfuel combustion process

Also Published As

Publication number Publication date
IN2014DN11249A (en) 2015-10-09
CA2878257A1 (en) 2014-02-13
CA2878257C (en) 2019-01-08
CN104519982A (en) 2015-04-15
US8795621B2 (en) 2014-08-05
WO2014025531A1 (en) 2014-02-13
EP2882522A1 (en) 2015-06-17
US20140041363A1 (en) 2014-02-13

Similar Documents

Publication Publication Date Title
SG11201500345WA (en) Catalytic reduction of nox with high activity catalysts
ZA201207969B (en) Vanadia-based denox catalysts and catalyst supports
PL2611524T3 (en) HETEROPOLY ACID PROMOTED CATALYST FOR SCR OF NOx WITH AMMONIA
GB2524903B (en) Diesel oxidation catalyst with NOx adsorber activity
EP2707353A4 (en) Catalytic carbonylation catalysts and methods
GB2479808B (en) Nox absorber catalysts
EP2838841A4 (en) Methods for using metal catalysts in carbon oxide catalytic converters
ZA201504075B (en) Core-shell particles with catalytic activity
EP2884071A4 (en) Catalytic reactor and vehicle equipped with said catalytic reactor
ZA201305575B (en) Ce containing,v-free mobile denox catalyst
EP2579985A4 (en) Nox storage catalyst with improved hydrocarbon conversion activity
SG2014011894A (en) Catalyst support and catalysts prepared therefrom
EP2764917A4 (en) Method for reducing the so² oxidation ratio increase of denitration catalyst
PL2714245T3 (en) Method for increasing the service life and/or catalytic activity of an scr catalyst
ZA201402957B (en) A low cost and high activity hydroprocessing catalyst
ZA201308813B (en) Core-shell particles with catalytic activity
GB2497669B (en) Automotive catalytic aftertreatment system
SG11201502012PA (en) Supported hydrotreating catalysts having enhanced activity
EP2556886A4 (en) Large-capacity metal catalyst carrier and catalytic converter using same
EP2992956A4 (en) Complex selective catalytic reduction catalyst
EP2864349A4 (en) Dynamic biomimetic synzyme catalyst, catalysis, and catalytic systems
SG11201500341RA (en) Catalytic reduction of nox with high activity catalysts with propylene reductant
SG11201500337YA (en) Catalytic reduction of nox with high activity catalysts with nh3 reductant
SG11201500315RA (en) CATALYTIC REDUCTION OF NOx WITH HIGH ACTIVITY CATALYSTS WITH ACETALDEHYDE REDUCTANT
GB2511178B (en) NOx absorber catalysts