NO reduction with acetaldehyde on alumina-supported Pd–Mo catalysts

• Published in: Journal of catalysis Vol. 242; no. 1; pp. 48 - 57
• Main Authors: de Mello, L.F., Noronha, F.B., Schmal, M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 15.08.2006; Elsevier; Elsevier BV
• Subjects: Acetaldehyde; Catalysis; Chemistry; Exact sciences and technology; General and physical chemistry; Molybdenum; Palladium; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; TPD and reactions; NO; Palladium; TPD and reactions; Molybdenum; Acetaldehyde; Mixed catalyst; Transition metal; Aldehyde; Supported catalyst; Chemical reduction; Heterogeneous catalysis; Nitric oxide; Alumina; Platinoid; Catalyst support
• DOI: 10.1016/j.jcat.2006.05.013
• ISSN: 0021-9517

The reduction of NO with acetaldehyde on alumina-supported Pd, Mo, and Pd–Mo catalysts was studied. Two Mo loadings were used (8 and 20%), and the Pd–8% Mo/Al 2O 3 catalyst was the most active for NO conversion. Temperature-programmed desorption and infrared measurements of adsorbed acetaldehyde indicated that acetate species are probably an important reaction intermediate. The presence of Pd in close contact with Mo favors formation of the acetate species, which could explain the higher activity for the Pd8Mo sample. The 20% Mo loading produced bulk MoO 3, which covered part of the Pd sites, and thus the activity for this catalyst was lower.