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2013/3
Promotion and Alkaline Treatment of Type MFI Zeolite: Influence on Structure, Acidic Properties and Selectivity in Propane-Butane Conversion
Oil and gas processing, chemistry of oil and gas

Authors: Alexei G. DEDOV graduated from the Chemistry Department of Lomonosov Moscow State University in 1977. He is Corresponding Member of the Russian Academy of Sciences, Head of the Department of General and Inorganic Chemistry Gubkin Russian State University of Oil and Gas. He specializes in the field of catalysis and analytical chemistry, transformations of light alkanes. He is author of over 200 scientific publications. E-mail: genchem@gubkin.ru
Daria A. LEVCHENKO graduated from Gubkin Russian State University of Oil and Gas in 2010. She is graduate student of the Department of General and Inorganic Chemistry of Gubkin Russian State University of Oil and Gas, specializing in the field of catalytic transformations of hydrocarbons. E-mail: genchem@gubkin.ru
Nikolai A. SPESIVTSEV graduated from Kuban State Technological University in 2012. He is graduate student of the Department of General and Inorganic Chemistry of Gubkin Russian State University of Oil and Gas. He specializes in the field of X-ray diffraction. E-mail: genchem@gubkin.ru
Alexey S. LOKTEV graduated from the Chemistry Department of Lomonosov Moscow State University in 1979. He is Doctor of Chemical Sciences, Professor of the Department of General and Inorganic Chemistry of Gubkin Russian State University of Oil and Gas. He is a specialist in the field of catalysis, author of over 100 scientific publications. E-mail: genchem@gubkin.ru
Ayrat V. ISHMURZIN graduated from Kazan State Technical University in 1995. He is Candidate of Chemical Sciences, Head of the Department for Processing of Gas, Gas Condensate and Oil of JSC “Gazprom”. He is an expert in the field of refining and petrochemicals. E-mail: A.Ishmurzin@adm.gazprom.ru
Ilya I. MOISEEV graduated from Lomonosov Moscow Institute of Chemical Engineering in 1952. He is Full Member of the Russian Academy of Sciences, Professor of the Department of General and Inorganic Chemistry of Gubkin Russian State University of Oil and Gas. He is a specialist in the field of coordination chemistry and catalysis. He is author of over 600 scientific publications. E-mail: genchem@gubkin.ru

Abstract: The effect of the promotion with zinc and chromium, as well as treatment with NaOH solution of the structure, acid and catalytic properties of type MFI zeolite is studied. It is shown that the crystal structure of the zeolite remains unchanged after the introduction of promoters, alkaline treatment and use in the conversion of propane and butane fraction (PBF). At the same time, the promotion decreases the total acidity and the amount of strongly acidic centers accompanied by increased selectivity of aromatic hydrocarbons formation. After alkaline treatment the selectivity of aromatic hydrocarbons formation also increases, while the force of distribution of acid sites on the zeolite remains unchanged.

Index UDK: 665.656.6(043)

Keywords: catalysis, type MFI zeolite, structure, acidic properties, promotion with zinc and chromium, alkali treatment, propane-butane fraction, X-ray diffraction, thermo-sorption of ammonia

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