I. V. Shamanaev, E. N. Vlasova, I. V. Yakovlev, A. Yu. Fedorov, V. P. Pakharukova, E. Yu. Gerasimov, G. A. Bukhtiyarova
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引用次数: 0
Abstract
A series of Ni2P catalysts on an Al2O3-SAPO-11 composite support were synthesized by two different methods: reduction of Ni and P precursors by hydrogen at elevated temperatures (TPR); and phosphidation of supported Ni metallic particles by triphenylphosphine (PPh3). For loading active components, aqueous solutions prepared from different precursors (specifically, Ni(OAc)2 and (NH4)2HPO4; Ni(OH)2 and H3PO3; and Ni(OAc)2 and H3PO2) were used in the first case, and a Ni(OAc)2 solution was used in the second. The catalysts were characterized by chemical analysis, H2-TPR, NH3-TPD, XRD, TEM, XPS, and 27Al MAS NMR. The catalyst performance was tested in hydroprocessing of a model compound of fatty acid triglycerides, specifically methyl palmitate (MP). The formation of a Ni2P phase was confirmed by XRD, TEM, and XPS; moreover, the synthesis method was found to affect the localization of Ni2P nanoparticles. It was further revealed that, in the TPR method, the particles are predominantly located on the Al2O3 surface, whereas the PPh3 method produces particles on the surfaces of both Al2O3 and SAPO-11. The main MP conversion products are n- and iso-alkanes (C15 and C16). At 100% conversion of oxygenates, the PPh3-synthesized catalyst achieved a higher iso-alkane selectivity (63%) than the TPR-prepared samples (2–21%).
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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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