Reactions of alkanes on supported Pt-Au alloys
作者： J VANSCHAIK
DOI: 10.1016/0021-9517(75)90088-3
关键词:
摘要: Isomerization, dehydrocyclization and hydrogenolysis reactions of n-pentane n-hexane were studied on supported Pt Pt-Au alloys. The alloys all in the composition range where this system is completely miscible (18% Au). Characteristic changes selectivity towards different observed when was compared with 1–12.5% at temperatures 250–400 °C: (a) extremely diluted Au (1–4%) mainly catalyses isomerization; (b) a around 10% favor dehydrocyclization; (c) pure shows isomerization. From comparison it possible to suggest self-consistent picture mechanisms involved. For above reaction proceeds via one-site isomerization mechanism. Catalysts are comparable small particle catalysts show cyclization cyclic Pure bond shift mechanism (αα-γ adsorption) while ring closure probably an αα-Ω adsorbed intermediate.
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sci-hub.se 参考文章(6)
J. A. Catterall, O. Kubaschewski, Thermochemical data of alloys ,(1956)
C COROLLEUR, The mechanisms of hydrogenolysis and isomerization of hydrocarbons on metals. VI. Isomerization of labeled hexanes on a 0.2% platinum-alumina catalyst*1 Journal of Catalysis. ,vol. 24, pp. 385- 400 ,(1972) , 10.1016/0021-9517(72)90123-6
Stanley M. Kulifay, A Low Temperature Synthesis for Powder-form Intermetallics and Other Compounds Journal of the American Chemical Society. ,vol. 83, pp. 4916- 4919 ,(1961) , 10.1021/JA01485A011
H MATSUMOTO, Contrast between nickel and platinum catalysts in hydrogenolysis of saturated hydrocarbons Journal of Catalysis. ,vol. 19, pp. 101- 112 ,(1970) , 10.1016/0021-9517(70)90272-1
J ANDERSON, Relation between catalytic properties and structure of metal films: II. Skeletal reactions of some C6 alkanes Journal of Catalysis. ,vol. 20, pp. 147- 162 ,(1971) , 10.1016/0021-9517(71)90076-5
M MCKERVEY, A novel mechanism for 1,2-bond shift isomerizations of alkanes on noble metals Journal of Catalysis. ,vol. 30, pp. 330- 331 ,(1973) , 10.1016/0021-9517(73)90080-8