P. A. Zharova

Selective deoxygenation of vegetable oils in the presence of Pt–Sn/Al2O3 catalyst

We studied deoxygenation of individual fatty esters and fatty acid triglycerides from vegetable oils and lipid extracts from microalgae in the presence of catalysts prepared by deposition of Pt–Sn-containing compounds onto the γ-aluminum oxide surface. Using individual esters as an example, selective reduction of oxygen into water was demonstrated for the first time to proceed on a catalytic system at the 5 : 1 molar ratio of Sn and Pt active components to afford hydrocarbon components of substrates in virtually quantitative yield. Transformation of vegetable oil in the presence of this catalyst affords the C3–C18 hydrocarbon fraction in yield up to 99% at the content of C3 and C18 hydrocarbons up to 90%. The fraction of C1 and C2 hydrocarbons and carbon oxides is not higher than 0.5%. The possibility of carbon weight loss minimization during transformation of lipids was shown for the first time.

Conversion of ethanol and glycerol to olefins over the Re- and W-containing catalysts

The catalytic conversion of a mixture of ethanol and glycerol over the Re—W/Al2O3 catalysts was studied. The Re—W binary system exhibits a non-additive cocatalytic effect in the conversion of ethanol and its mixture with glycerol into the fraction of olefins С4—С9. The non-additive increase in the catalytic activity is associated with the specific structure of the binuclear metallocomplex precursors, due to which the supported metals are arranged in the immediate vicinity from each other on the support surface and intensively interact to form Re7+. The study of the combined conversion of ethanol and glycerol made it possible to find an optimum ratio of the reactants in the initial mixture. The yield of target hydrocarbons attains 50 wt.% based on the amount of carbon passed through the reactor.

Direct conversion of ethanol and fusel oils to alkane–aromatic hydrocarbons in the presence of a pilot Pd–Zn/TsVM catalyst

The conversion of ethanol and fusel oils to a С3–С12 alkane–aromatic fraction with high activity and selectivity in the presence of the Pd–Zn/TsVM pilot catalyst has been demonstrated. It has been shown that the ethanol conversion to alkanes and aromatic hydrocarbons in the presence of this catalyst proceeds by various routes to give ethylene and diethyl ether as intermediate products providing a 90–95% yield on the converted ethanol carbon basis for the target С3–С12 fraction containing up to 40% of branched alkanes.

Single-Stage Catalytic Coconversion of Vegetable Oils and Alcohols to the Alkane–Aromatic Hydrocarbon Fraction without Using Molecular Hydrogen

A method for the production of a С3–С11 alkane–aromatic hydrocarbon (HC) fraction by the coconversion of a mixture of alcohols simulating biomass fermentation products and vegetable oil without using molecular hydrogen has been developed. A characteristic feature of this method is the occurrence of coupled alcohol aromatization reactions evolving hydrogen consumed for the hydrogenation of unsaturated HC moieties formed from fatty acid triglycerides in the presence of a pilot sample of the Pd–Zn/TsVM/Al2O3 catalyst. It has been found that the optimum amount of vegetable oil in the feed mixture is 25–50 vol %; this amount provides the target fraction yield of up to 95% on a fed carbon basis.

The direct hydrodeoxygenation of vegetable oil over Pt-Sn/Al 2 O 3 catalysts

The Direct Hydrodeoxygenation of Vegetable Oil over PtSn/Al2O3 Catalysts Andrey V. Chistyakov, Mark V. Tsodikov, Polina A. Zharova, Vladimir V. Kriventsov, Michele Corbetta, Flavio Manenti Topchiev Institute of Petrochemical Synthesis RAS, Leninskii pr. 29, Moscow 119991, Russia Semenov Institute of Chemical Physics RAS, Kosygina str., 4, Moscow 119991, Russia Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, pr. Lavrent’eva 5, Novosibirsk, 630090 Russia d Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy chistyakov@ips.ac.ru

Supercritical ethanol and isopropanol conversion into chemicals over Au-M catalysts

Supercritical Ethanol and Isopropanol Conversion into Chemicals over Au-M Catalysts Polina A. Zharova, Andrey V. Chistyakov, Mark V. Tsodikov, Sergey A. Nikolaev, Francesco Rossi, Flavio Manenti Topchiev Institute of Petrochemical Synthesis RAS, Leninskii pr. 29, Moscow 119991, Russia Semenov Institute of Chemical Physics RAS, Kosygina str., 4, Moscow 119991, Russia Moscow State University, Leninskie Gory 1, Moscow 119991, Russia d Politecnico di Milano, Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta”, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, IN 47907-2100, United States zharova@ips.ac.ru

Synergistic effect of gold and copper in the catalytic conversion of ethanol to linear α-alcohols

The reaction features of the direct conversion of ethanol to butanol-1 and hexanol-1 in the presence of mono- and bimetallic active components based on Au and Cu supported on γ-Al2O3 have been studied. It has been found that under conditions providing the supercritical state of ethanol, the reaction rate and selectivity in the presence of the Au–Cu/Al2O3 catalyst abruptly increases. In addition, a synergistic effect is observed: the yield of desired products over the Au–Cu catalyst is 6 or 14 times that over the Au or Cu monometallic counterpart, respectively. Differences in the catalytic behavior of the Au–Cu, Au-, and Cu-based systems have been discussed taking into account their structural features and the reaction mechanism.

Alkylation of isopropanol with ethanol over heterogeneous catalysts

Alkylation of Isopropanol with Ethanol over Heterogeneous Catalysts Polina A. Zharova*, Andrey V. Chistyakov, Mark V. Tsodikov, Sergey A. Nikolaev, Michele Corbetta, Flavio Manenti a A.V. Topchuev Institute of Petrochemical Synthesis, Leninskiy prospect, 29, Moscow, 119991, Russian Federation Lomonosov Moscow State University, GSP-1, 1-3 Leninskiye Gory, Moscow, 119991, , Russian Federation Politecnico di Milano, Dipartimento di Chimica,Piazza Leonardo da Vinci, 32, 20133 Milano, Italy zharova@ips.ac.ru