Selective reduction of NOx by hydrogen and methane in natural gas stationary sources over alumina supported Pd, Co and Co/Pd catalysts: Part B: On the effect of bimetallic catalyst preparation

✍ Scribed by Rui Marques; Linda Mazri; Stéphanie Da Costa; Franck Delacroix; Gérald Djéga-Mariadassou; Patrick Da Costa

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 566 KB
• Volume: 137
• Category: Article
• ISSN: 0920-5861
• DOI: 10.1016/j.cattod.2007.11.024

✦ Synopsis

The aim of the present work is to study the selective reduction of NO x from natural gas sources using unburned methane or hydrogen as reducing agents. The results suggest that the NO x are reduced by H 2 at low temperature, when methane is not activated and at higher temperature the methane is then the main reducing agent. Similar results are obtained for alumina supported palladium and alumina supported cobald-palladium catalysts at low temperature in presence of hydrogen suggesting that the active phase for the reaction NO/H 2 is the palladium. However, at high temperature the higher activity is obtained on bimetallic catalyst. The presence of cobalt enhances the catalytic activity. This result suggests that cobalt and palladium both in cationic form are the active sites when the reducing agent is the methane.