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Victor M. Kogan

Leading speaker for catalysis conference 2017 - Victor M. Kogan

Title: Design of bifunctional catalysts on the basis of nano-sized K-modified transition metal sulfides for HDS of oil fractions and syngas conversion into alcohols and other oxygenates

Victor M. Kogan

Zelinsky Institute of Organic Chemistry, Russia


Victor M. Kogan. He graduated from Oil and Gas University as a chemical engineer, specialty – radiation chemistry. Since 1979 he has been a researcher at the Zelinsky Institute of Organic Chemistry of the Russian Academy of sciences. Here he accomplished his PhD Thesis in Chemistry (Catalysis) and D. Sc. Thesis (Habilitation). From 2009 he heads the Institute Laboratory of Catalysis by Transition Metals and their Compounds. Over a long period of time he has been working in the area of heterogeneous catalysis and the mechanisms of catalytic reactions. The catalysts for oil refinery and synthesis gas conversion over transition metal sulfides for alcohol production are in the focus of his studies. Some fundamentals in the field of catalysis by transition metal sulfides has been obtained and commercially used. His research interests include studies of mechanisms of catalytic reactions, pathways and rates of molecule and molecule fragment transformations by using radioisotopes. He has published a number of academic articles on the mechanisms of olefin and ring olefin metathesis; thiophene hydrodesulfurization, Fischer-Tropsch and alcohol synthesis over p- and d-metals and their sulfides; synthesis of alcohol and oxygenates over transition metal compounds; development of new types of catalysts for hydrotreating, hydrogenation and isomerization in international journals. He served as a visiting Professor in some institutions and universities in France, South Korea and PR of China. 


Recently suggested concept on the dynamic nature of active sites (AS) of the catalysts (Dynamic Model - DM) based on transition metal sulfides bases a hypothesis, that AS formed and functioning under the reaction conditions can oscillate between layers of promoted molybdenum sulfide.The DM assumes the existence of the AC of different types and the possibility of their mutual transformation due to the reversible migration of sulfur and promoter between the crystallite layers in a hydrogen atmosphere. The DM explains a series of “structure – property ”correlations. The results suggest that the catalytic activity in hydrodesulfurization (HDS) and hydrogenation(HYD) reactions depends on the shape of crystallites of the active phase. Alkali-modified CoMoS is a promising catalytic system both for hydrotreating of FCC gasoline and synthesis of higher alcohols from synthesis gas. According to quantum chemical calculations potassium donates electronic density onto the Co atoms of CoMoS phase AS. Reduction of metal atoms of the AS leads to a decrease in Lewis acidity and in the CO and H2 adsorption energy as well as promoting the oxidative addition of H2. The influence of ethanol addition to synthesis gas on its conversion and the product composition results in sharp increase of CO conversion in the presence of ethanol. A reaction network of CO conversion on the KCoMoS catalyst active sites depending on the catalyst composition and reaction conditions was suggested. The proposed model makes it possible to develop criteria for the evaluation of the efficiency of catalytic performance for HDS of oil crudes of various types, for syngas conversion with formation of higher alcohols and their followed conversion into wide range of oxygenates.