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A combination of NOx trapping materials and urea-SCR catalysts for use in the removal of NOx from mobile diesel engines

2006; Elsevier BV; Volume: 70; Issue: 1-4 Linguagem: Inglês

10.1016/j.apcatb.2005.11.025

1873-3883

James A. Sullivan, Orla Keane,

Catalysis and Hydrodesulfurization Studies

Preliminary studies on a series of nanocomposite BaO–Fe ZSM-5 materials have been carried out to determine the feasibility of combining NOx trapping and SCR-NH3 reactions to develop a system that might be applicable to reducing NOx emissions from diesel-powered vehicles. The materials are analysed for SCR-NH3 and SCR-urea reactivity, their NOx trapping and NH3 trapping capacities are probed using temperature programmed desorption (TPD) and the activities of the catalysts for promoting the NH3 ads + NO/O2 → N2 and NOx ads + NH3 → N2 reactions are studied using temperature programmed surface reaction (TPSR).