IN2014CN00341A - - Google Patents

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Publication number
IN2014CN00341A
IN2014CN00341A IN341CHN2014A IN2014CN00341A IN 2014CN00341 A IN2014CN00341 A IN 2014CN00341A IN 341CHN2014 A IN341CHN2014 A IN 341CHN2014A IN 2014CN00341 A IN2014CN00341 A IN 2014CN00341A
Authority
IN
India
Prior art keywords
exhaust system
zone
trap
catalyzed substrate
substrate
Prior art date
Application number
Inventor
Andrew Francis Chiffey
Paul Richard Phillips
Daniel Swallow
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 IN2014CN00341A publication Critical patent/IN2014CN00341A/en

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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
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    • 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
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    • 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
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    • Y10S502/00—Catalyst, solid sorbent, or support therefor: product or process of making
    • Y10S502/52712—Plural layers on a support, each layer having a distinct function

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  • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Catalysts (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

x33x2xAn exhaust system for internal combustion engines and a catalyzed substrate for use in an exhaust system is disclosed. The exhaust system comprises a lean NO trap and the catalyzed substrate. The catalyzed substrate has a first zone and a second zone wherein the first zone comprises a platinum group metal loaded on a support and the second zone comprises copper or iron loaded on a zeolite. The first zone or second zone additionally comprises a base metal oxide or a base metal loaded on an inorganic oxide. Also provided are methods for treating an exhaust gas from an internal combustion engine using the exhaust system. The exhaust system is capable of storing NH generated in rich purging reacting the NH with slip NO from the ??? trap controlling HS released from NO trap desulfation and oxidizing slip hydrocarbons and carbon monoxide. When the catalyzed substrate is a filter substrate it is also capable of removing soot from exhaust system.
IN341CHN2014 2011-06-21 2012-06-19 IN2014CN00341A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161499340P 2011-06-21 2011-06-21
GB1111950.0A GB2492175B (en) 2011-06-21 2011-07-13 Exhaust system for internal combustion engine comprising catalysed filter substrate
PCT/GB2012/051407 WO2012175948A1 (en) 2011-06-21 2012-06-19 Catalyzed substrate and exhaust system for internal combustion engines

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