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Title: Selective catalytic reduction system and process for treating NOx emissions using a palladium and rhodium or ruthenium catalyst

Patent ·
OSTI ID:1019432
 [1];  [2];  [2]
  1. Orlando, FL
  2. Columbus, OH
+ Show Author Affiliations

A process for the catalytic reduction of nitrogen oxides (NOx) in a gas stream (29) in the presence of H.sub.2 is provided. The process comprises contacting the gas stream with a catalyst system (38) comprising zirconia-silica washcoat particles (41), a pre-sulfated zirconia binder (44), and a catalyst combination (40) comprising palladium and at least one of rhodium, ruthenium, or a mixture of ruthenium and rhodium.

Research Organization:
Siemens Energy, Inc. (Orlando, FL)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
7,976,805
Application Number:
US Patent Application 12/773,052
OSTI ID:
1019432
Country of Publication:
United States
Language:
English

References (5)

An Investigation of the NO/H2/O2 (Lean De-NOx) Reaction on a Highly Active and Selective Pt/La0.7Sr0.2Ce0.1FeO3 Catalyst at Low Temperatures journal July 2002
Low temperature catalytic NOx–H2 reactions over Pt/TiO2-ZrO2 in an excess oxygen journal December 2001
The current state of research on automotive lean NOx catalysis journal September 1997
An investigation of the NO/H2/O2 reaction on noble-metal catalysts at low temperatures under lean-burn conditions journal November 1999
Low-temperature H2-SCR of NO on a novel Pt/MgO-CeO2 catalyst journal March 2007

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