Dehydrogenation and hydrogenation activity of palladium-tin-silica and nickel-tin silica

Journal Article · Thu Dec 01 04:00:00 EST 1977 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(77)90054-9· OSTI ID:5709475

Masai, M; Kishi, K; Honda, K; Kubota, A; Ohnaka, S; Nishikawa, Y; Nakahara, K; Ikeda, S

The dehydrogenation of cyclohexanone on palladium-tin-silica catalyst at 753/sup o/K yielded phenol as major product; the dehydrogenation of cyclohexylamine at 673/sup o/K yielded mainly aniline; the dehydrogenation of 2-propanol at 723/sup o/K yielded only acetone; the dehydrogenation of cyclohexane at 723 yielded only benzene. The optimum dehydrogenation catalyst had a 3:1 palladium-tin ratio for cyclohexylamine and cyclohexane and a 0.3:1 ratio for cyclohexanone and 2-propanol, and all four conversions were higher with, than without tin. The hydrogenation of ethylene on palladium-tin-silica yielded only ethane, and conversions were higher on 100% Pd than on palladium/tin catalysts. The hydrogenation of benzene on nickel/tin/silica yielded only cyclohexane and conversions were higher on nickel/silica than on this catalyst with added tin. These results, and carbon monoxide adsorption studies, carbon deposition, X-ray diffraction patterns, and ESCA studies suggested that the tin causes a weakening of the adsorption bond, and prevents formation of deposits which poison dehydrogenation and promote hydrogenation. Graphs, spectra, tables, and 25 references.

• Research Organization: Kobe Univ., Japan
• OSTI ID: 5709475
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 50:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ADSORPTION
AROMATICS
BENZENE
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
DEHYDROGENATION
ELEMENTS
HYDROCARBONS
HYDROGENATION
METALS
NICKEL
ORGANIC COMPOUNDS
PALLADIUM
PLATINUM METALS
SORPTION
TIN
TRANSITION ELEMENTS