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Title: Selective catalytic reduction system and process for control of NO.sub.x emissions in a sulfur-containing gas stream

Patent ·
OSTI ID:1209482

An exhaust gas treatment process, apparatus, and system for reducing the concentration of NOx, CO and hydrocarbons in a gas stream, such as an exhaust stream (29), via selective catalytic reduction with ammonia is provided. The process, apparatus and system include a catalytic bed (32) having a reducing only catalyst portion (34) and a downstream reducing-plus-oxidizing portion (36). Each portion (34, 36) includes an amount of tungsten. The reducing-plus-oxidizing catalyst portion (36) advantageously includes a greater amount of tungsten than the reducing catalyst portion (36) to markedly limit ammonia salt formation.

Research Organization:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
9,101,877
Application Number:
13/453,013
OSTI ID:
1209482
Resource Relation:
Patent File Date: 2012 Apr 23
Country of Publication:
United States
Language:
English

References (15)

Catalysts for selective catalytic reduction denox technology patent August 1992
Denitration catalyst patent August 1997
Catalyst for purifying the exhaust gas from the combustion in an engine or gas turbines and method of making and using the same patent March 2000
Apparatus and method for catalytic treatment of exhaust gases patent June 2008
Ammonia oxidation catalyst for the coal fired utilities patent July 2008
High temperature catalyst and process for selective catalytic reduction of NOx in exhaust gases of fossil fuel combustion patent April 2010
Catalytic process for control of NOx emissions using hydrogen patent May 2010
Ammonia oxidation catalyst for power utilities patent June 2010
Selective catalytic reduction system and process using a pre-sulfated zirconia binder patent June 2010
Method for production of catalyst and catalyst produced by the method patent November 2010
Selective catalytic reduction system and process for treating NOx emissions using a palladium and rhodium or ruthenium catalyst patent July 2011
Selective catalytic reduction system and process for treating NOx emissions using a zinc or titanium promoted palladium-zirconium catalyst patent August 2011
Catalyst and method of manufacture patent August 2013
Method of suppressing increase in SO2 oxidation rate of NOx removal catalyst patent May 2014
Apparatus and method for catalytic treatment of exhaust gases patent-application May 2007

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