Reaction intermediates in the selective reduction of NO with propene over Ga2O3-Al2O3 and In2O3-Al2O3 catalysts

✍ Scribed by Masaaki Haneda; Emmanuel Joubert; Jean-Christophe Ménézo; Daniel Duprez; Jacques Barbier; Nicolas Bion; Marco Daturi; Jacques Saussey; Jean-Claude Lavalley; Hideaki Hamada

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 198 KB
• Volume: 175
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(01)00215-1

✦ Synopsis

Minor products formed in the reaction of NO + C 3 H 6 + O 2 over Ga 2 O 3 -Al 2 O 3 and In 2 O 3 -Al 2 O 3 were identified by using GC-MS technique. A lot of minor products, such as oxygenated, nitrile, nitrite compounds and higher hydrocarbons were detected on both catalysts. The formation of surface nitrile species in the NO + C 3 H 6 + O 2 reaction was also recognized in the diffuse reflectance FT-IR spectra. FT-IR spectra showed that the reaction starts with the formation of adsorbed nitrate (NO 3 -) species via NO oxidation by O 2 . From the comparison of the distribution of minor products in NO + C 3 H 6 + O 2 and 2-nitropropane oxidation, a reaction pathway in which NO reduction proceeds through the formation of organic nitro compounds and subsequent decomposition to some oxygenated and nitrile compounds was proposed.