Back to Search
Start Over
Review of Ag/Al2O3-Reductant System in the Selective Catalytic Reduction of NOx.
- Source :
- Catalysis Surveys from Asia; Mar2008, Vol. 12 Issue 1, p38-55, 18p, 5 Diagrams, 2 Charts, 18 Graphs
- Publication Year :
- 2008
-
Abstract
- Ag/A1203 is a promising catalyst for the selective catalytic reduction (SCR) by hydrocarbons (HC) of NO<subscript>x</subscript> in both laboratory and diesel engine bench tests. New developments of the HC-SCR of NO<subscript>x</subscript> over a Ag/ A1<subscript>2</subscript>O<subscript>3</subscript> catalyst are reviewed, including the efficiencies and sulfur tolerances of different Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>-reductant systems for the SCR of NO<subscript>x</subscript>; the low-temperature activity improvement of H<subscript>2</subscript>-assisted HC-SCR of NO<subscript>x</subscript> over Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>; and the application of a Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>-ethanol SCR system with a heavy-duty diesel engine. The discussions are focused on the reaction mechanisms of different Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>-reductant systems and H<subscript>2</subscript>-assisted HC-SCR of NO<subscript>x</subscript> over Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>. A SO<subscript>2</subscript>-resistant surface structure in situ synthesized on Ag/ A1<subscript>2</subscript>O<subscript>3</subscript> by using ethanol as a reductant is proposed based on the study of the sulfate formation. These results provide new insight into the design of a high-efficiency NO<subscript>x</subscript> reduction system. The diesel engine bench test results showed that a Ag/ A1<subscript>2</subscript>O<subscript>3</subscript>-ethanol system is promising for catalytic cleaning of NO<subscript>x</subscript> in diesel exhaust. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15711013
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Catalysis Surveys from Asia
- Publication Type :
- Academic Journal
- Accession number :
- 31952237
- Full Text :
- https://doi.org/10.1007/s10563-007-9038-9