A. B. Ponomaryov, A. V. Smirnov, M. V. Shostakovsky, E. V. Pisarenko, A. G. Popov, M. A. Kashkina
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Modification of Zeolites with Tin to Synthesize Pt–Sn/MFI Catalysts for Propane Dehydrogenation
Abstract
Modification of MFI-type zeolites with tin involves impregnating the zeolite with an SnCl2 solution in excess NaCl, calcination (to fix the tin oxide), and water washing (to remove excess NaCl). Loading platinum on the tin-modified support results in a highly active (5–10 mol of C3H6 per mol of Pt per second), selective (96–98% towards propylene), and stable catalyst for dehydrogenation of propane. Due to the high dispersion of tin, which serves as an anchor for platinum, the average Pt particle size is 1.2 nm. The dispersion of tin is facilitated not only by the molecular dilution of its precursor with sodium chloride but also by the redispersion of tin across the surface due to the formation of volatile SnCl4 during calcination.
期刊介绍：
Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas.
Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
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