Hydrocarbon selective catalytic reduction of NO over Cu/Fe-pillared clays: Diffuse reflectance infrared spectroscopy studies

✍ Scribed by Fernando Dorado; Prado Belén García; Antonio de Lucas; María Jesús Ramos; Amaya Romero

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 511 KB
• Volume: 332
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2010.08.019

✦ Synopsis

The selective catalytic reduction (SCR) of NO was investigated by in situ diffuse reflectance infrared spectroscopy (DRIFTS) over catalysts based on iron-pillared clays (Fe-PILC) ion exchanged with copper. It was studied the influence of either total amount of metal or copper distribution as Cu 2+ and CuO on the surface, with the aim to give a general idea of the reaction mechanism for this kind of catalysts. It was noted that the reaction intermediates were nitrates, nitrites, acetate, and C x H y O z N species. At low temperatures, bands corresponding to the vibration of C C and COO -groups were observed for those samples with CuO in their structure, confirming that its presence improves the NO yield to N 2 .