A solid acid of tungsta-niobia more active than aluminosilicates for decompositions of cumene, ethylbenzene, and toluene

• Published in: Applied catalysis. A, General Vol. 310; pp. 190 - 193
• Main Authors: Hino, Makoto, Kurashige, Mitsuhiko, Matsuhashi, Hiromi, Arata, Kazushi
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 17-08-2006; Elsevier
• Subjects: Adsorption; Catalysis; Chemistry; Cracking; Cumene; Ethanol; Ethylbenzene; Exact sciences and technology; General and physical chemistry; Solid acid; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Toluene; WO 3-Nb 2O 5; Ar; Ethylbenzene; Ethanol; Adsorption; Toluene; Cracking; Cumene; Solid acid; WO 3-Nb 2O 5; Hydrocarbon; Transition metal Compounds; Transition element compounds; Aluminosilicates; Alcohol; Decomposition; WO3-Nb2O5; Solid; Heterogeneous catalysis; Tungsten oxide; Niobium Oxides; Acids; Alkanol; Benzenic compound; Catalytic cracking
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2006.05.038

A solid acid of tungsten-niobium oxide was obtained by evaporating the water from a mixed solution of ammonium metatungstate and niobium ammonium oxalate in water in the ratio 7:1 of W to Nb, followed by calcining in air at 400
°C. The catalytic activity of the solid acid for decompositions of toluene, ethylbenzene, and cumene was higher than those of tungstated zirconia, mordenite, and silica-alumina. The chief ingredient of Nb in the mixture was less effective. The acid strength was estimated by the heat of Ar adsorption to be 18.1
kJ
mol
−1, the value being coincident with that of H-mordenite (18.3
kJ
mol
−1).