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

Abstract

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.

Inventors:
Issue Date:
Research Org.:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1209482
Patent Number(s):
9101877
Application Number:
13/453,013
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
DOE Contract Number:  
FC26-05NT42644
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Apr 23
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Sobolevskiy, Anatoly. Selective catalytic reduction system and process for control of NO.sub.x emissions in a sulfur-containing gas stream. United States: N. p., 2015. Web.
Sobolevskiy, Anatoly. Selective catalytic reduction system and process for control of NO.sub.x emissions in a sulfur-containing gas stream. United States.
Sobolevskiy, Anatoly. Tue . "Selective catalytic reduction system and process for control of NO.sub.x emissions in a sulfur-containing gas stream". United States. https://www.osti.gov/servlets/purl/1209482.
@article{osti_1209482,
title = {Selective catalytic reduction system and process for control of NO.sub.x emissions in a sulfur-containing gas stream},
author = {Sobolevskiy, Anatoly},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {8}
}

Works referenced in this record:

Catalysts for selective catalytic reduction denox technology
patent, August 1992


Denitration catalyst
patent, August 1997


Apparatus and method for catalytic treatment of exhaust gases
patent, June 2008


Ammonia oxidation catalyst for the coal fired utilities
patent, July 2008


Catalytic process for control of NOx emissions using hydrogen
patent, May 2010


Ammonia oxidation catalyst for power utilities
patent, June 2010


Method for production of catalyst and catalyst produced by the method
patent, November 2010


Catalyst and method of manufacture
patent, August 2013


Apparatus and method for catalytic treatment of exhaust gases
patent-application, May 2007