Promotion effect of H2 on the low temperature activity of the selective reduction of NO by light hydrocarbons over Ag/Al2O3
- 8 May 2003
- journal article
- Published by Elsevier BV in Applied Catalysis B: Environment and Energy
- Vol. 42 (2), 179-186
- https://doi.org/10.1016/s0926-3373(02)00231-x
Abstract
The effect of H2 on the selective reduction of NO by light hydrocarbons over Ag/Al2O3 catalyst under lean-exhaust conditions was investigated. The NO reduction activity at the low temperature region was markedly increased by adding H2. The NO reduction activity at high GHSV condition and SO2 tolerance were also improved by adding H2. Since the NO was reduced little by H2 in the absence of C3H8, H2 should act as a promoter of NO reduction by hydrocarbons over Ag/Al2O3. The results of reaction studies and in situ IR experiments showed that the possible reasons for promoting the effect by H2 on the HC-SCR were mainly caused by the activation of hydrocarbons.Keywords
This publication has 33 references indexed in Scilit:
- Influence of low concentration of SO2 for selective reduction of NO by C3H8 in lean-exhaust conditions on the activity of Ag/Al2O3 catalystApplied Catalysis B: Environment and Energy, 2001
- Low temperature catalytic NOx–H2 reactions over Pt/TiO2-ZrO2 in an excess oxygenApplied Catalysis B: Environment and Energy, 2001
- Mechanistic causes of the hydrocarbon effect on the activity of Ag–Al2O3 catalyst for the selective reduction of NOPhysical Chemistry Chemical Physics, 2001
- Enhanced De-NOx Performance of Ag-Al2O3 Catalyst by Increasing Carbon Number of Hydrocarbon ReductantsChemistry Letters, 1999
- Study of nitric oxide reduction over silver/alumina catalysts under lean conditions: Effects of reaction conditions and supportCatalysis Today, 1998
- Selective reduction of nitrogen oxides by hydrocarbons under lean-burn conditions using supported platinum group metal catalystsCatalysis Today, 1995
- Research on new DeNOx catalysts for automotive enginesCatalysis Today, 1994
- Novel catalytic decomposition and reduction of NOCatalysis Today, 1994
- Reversible redox behaviour between silver cations and silver metal particles in hydrated Ag-Y zeolitesJournal of the Chemical Society, Faraday Transactions, 1993
- Reversibility in the transformation between cationic and metallic silver and the generation of Brønsted-acid sites in the silver salt of dodecatungstophosphoric acidJournal of the Chemical Society, Faraday Transactions, 1992