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Small pore molecular sieve supported copper catalysts

A molecular sieve and SCR catalyst technology, which is applied in molecular sieve catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as unexpected filters and undisclosed problems

Inactive Publication Date: 2016-08-10
JOHNSON MATTHEY PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document does not envisage placing the filter under reducing conditions
This document also fails to disclose or appreciate the durability of the catalyst after exposure to such a reducing atmosphere.

Method used

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  • Small pore molecular sieve supported copper catalysts
  • Small pore molecular sieve supported copper catalysts
  • Small pore molecular sieve supported copper catalysts

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Experimental program
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Embodiment

[0103] Although the invention has been described and illustrated herein in conjunction with specific embodiments, the invention is not limited to the details shown. Rather, various changes may be made in the details within the scope of equivalents of the claims without departing from the invention.

[0104] 1. Steady state SCR evaluation

[0105] Steady state selective catalytic reduction (SCR) activity tests were performed in a 24 inch long quartz reactor heated uniformly with two 12 inch long tube furnace assemblies. Experiment at 30000 hours -1 The gas hourly space velocity was carried out, and the catalyst size used was 1 inch diameter x 1 inch length. All gas lines directly connected to the reactor were maintained at 130°C by means of heating tapes to prevent adsorption of gaseous species on the walls of the gas lines. Water vapor was provided by a water bomb kept at 70°C throughout.

[0106] The feed gas is heated and mixed upstream of the reactor by an inert heat ma...

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Abstract

The invention relates to a system for treating exhaust gas. The system for treating exhaust gas comprises (a) a lean combustion NOx catcher; (b) a measuring system for ammonia or ammonia precursor which is used for adding the ammonia or the ammonia precursor to flowing exhaust gas metrically; and (c) a SCR catalyst, wherein the SCR catalyst is arranged in the downstream of the lean combustion NOx catcher and includes copper and / or iron supported on a small pore molecular sieve.

Description

[0001] This application is a national application number 201080027683.X (PCT / US2010) submitted on April 19, 2010 entitled "Small Pore Molecular Sieve Supported Copper Catalyst for Reducing Nitrogen Oxides and Endurable to Lean / Rich Burn Aging" / 031617) is a divisional application of the invention patent application. [0002] Related Application Cross Reference [0003] This application claims priority from US Provisional Application No. 61 / 170358 and US Provisional Application No. 61 / 312832, the entire contents of which are hereby incorporated by reference for all purposes. technical field [0004] The present invention relates to small pore molecular sieve supported copper catalysts which are durable after exposure to reducing atmospheres, especially high temperature exposure. Background technique [0005] People have developed the use of nitrogen-containing compounds such as ammonia or urea for NO x Technology for performing Selective Catalytic Reduction (SCR) used in ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56B01D53/94B01J29/76B01J29/85
CPCB01D53/8628B01D53/9418B01J29/76B01J29/763B01J29/85B01D2251/2062B01D2251/208B01D2255/20761B01D2255/50B01D2258/012B01D2258/018B01D2258/0291B01J29/072B01J29/46B01J29/56B01J29/7615B01J29/7676B01J29/83B01J37/0009B01J37/0246B01J37/16B01J2229/42B01D2255/9202B01D2253/1122Y02A50/20Y02T10/12B01J35/30B01J35/56B01J35/617B01J23/72
Inventor P·J·安德森H-Y·陈J·M·费迪科E·维格特
Owner JOHNSON MATTHEY PLC