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Timofeeva M.N.,RAS Boreskov Institute of Catalysis | Panchenko V.N.,RAS Boreskov Institute of Catalysis | Gil A.,Public University of Navarra | Doronin V.P.,Russian Academy of Sciences | And 3 more authors.
Applied Catalysis B: Environmental

A series of Zr,Al-pillared interlayered clays (Zr,Al-PILCs) have been prepared and characterized by X-ray diffraction, elemental analysis, FT-IR and N2-adsorption/desorption analyses, 27Al NMR(MAS), FT-IR spectroscopy using pyridine, PhCN and CDCl3 as probe molecules. It was found that textural and physicochemical properties of Zr,Al-PILCs depend on Zr content in clay. The relationship between the acid-base properties and catalytic performances of Zr,Al-PILCs was revealed in the synthesis of propylene glycol methyl ether from methanol and propylene oxide. The results show that the conversion of propylene oxide and the selectivity to 1-methoxy-2-propanol decrease with increasing the amount of zirconium in Zr,Al-PILCs due to the change in acid-base properties. © 2011 Elsevier B.V. Source

Shopin V.M.,RAS Institute of Hydrocarbons Processing
Solid Fuel Chemistry

The current trends of the development of studies and technologies for the separation of a target product from aerosol flows in the manufacture of carbon black are surveyed. Studies oriented to decreasing material and power consumption in the processes of carbon black production are analyzed. An analysis of aerosol coagulation mechanisms and the dependence of the rate constant of coagulation on the physicochemical properties of dispersed carbon is given. The precipitation of the target product in a cyclone collector is considered. Studies directed toward an improvement in the quality and effectiveness of thermoresistant filtering materials and bag-type filters with their use are analyzed. Some results of the experimental studies of the filtration of a dispersed carbon aerosol in a layer of porous carbon granules are given. © 2014 Allerton Press, Inc. Source

Surovikin Y.V.,RAS Institute of Hydrocarbons Processing | Likholobov V.A.,RAS Institute of Hydrocarbons Processing
Solid Fuel Chemistry

The latest advances in the synthesis of granulated carbon-carbon materials based on nanodispersed globular and pyrolytic carbons modified with silicon or its compounds at the Institute of Hydrocarbons Processing, Siberian Branch, Russian Academy of Sciences are considered. The methods and main regularities of the synthesis and the physicochemical properties of silicon-containing composite materials like C/SiO2, C/SiO2/C, and SiO2/C are discussed. It is shown that the synthesis of modified nanocomposites with the use of polyorganosiloxanes is a promising line in the development of silicon-containing carbon-carbon materials. In this work, a nontraditional approach to the production of mesoporous silicon dioxide based on nanodispersed globular carbon and polyorganosiloxanes is proposed. © 2014, Allerton Press, Inc. Source

Krivonos O.I.,RAS Institute of Hydrocarbons Processing | Plaksin G.V.,RAS Institute of Hydrocarbons Processing
Solid Fuel Chemistry

The main stages of the formation of the porous structure of carbon-mineral materials (PCM) upon the carbonization of sapropels were demonstrated. The structure and physicochemical properties of the obtained materials were studied. © 2015, Allerton Press, Inc. Source

Bulavchenko O.A.,Novosibirsk State University | Afonasenko T.N.,RAS Institute of Hydrocarbons Processing | Tsyrul'Nikov P.G.,RAS Institute of Hydrocarbons Processing | Tsybulya S.V.,Novosibirsk State University
Applied Catalysis A: General

Catalytic properties of MnOx/Al2O3 catalysts were studied in the CO oxidation reaction. The catalysts were prepared by co-precipitation and then the product was calcined in Ar or air at temperatures of 700-1200 C. It was found that increase in the calcination temperature to 950-1000 C lead to the growth of catalytic activity for both series, especially for catalysts calcined in air. An increase in the catalytic activity of the catalysts calcined in Ar was related to the formation of Mn 3-xAlxO4 cubic spinel which was stable during specimen cooling in inert atmosphere. It was found that active component in the air-calcined catalysts was formed via decomposition of the high-temperature precursor (cubic spinel Mn3-xAlxO4) followed by the appearance of aggregates consisting of imperfect Mn3O 4+δ oxide and amorphous Mn-Al-O phase. The decomposition was accompanied by the formation of weakly bound oxygen which appears to be active in oxidation reactions. The structure of the active component was directly related to the composition of the high-temperature precursor - the higher the concentration of manganese cations are in the Mn3-xAl xO4 cubic spinel, the more Mn3O4 and weakly bound oxygen appear in the decomposition product. © 2013 Elsevier B.V. All rights reserved. Source

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