from first principles PP-I-1

OY-III-7Bimetallic Catalysts of Selective Benzene Hydrogenationfor Environmental Gasoline ProductionKonuspayeva Z.S. 1,4 , Auezov A.B. 2 , Konuspayev S.R. 1 , Burkitbayev M.M. 1 , Piccolo L. 4 ,Berhault G. 4 , Shaimardan M. 31 Al-Farabi Kazakh National University, Almaty, Kazakhstan2 Scientific Research Institute of New Chemical Technology & Materials , Almaty, Kazakhstan3 Kazakh British Technical University, Almaty, Kazakhstan,4 Institut de Recherches sur la Catalyse et l’Environnement de Lyon, IRCELYON, Lyon, Francezikonyask@gmail.comThe incomplete combustion of the gasoline containing benzene can form the strongestcarcinogen benzapyrene in exhaust gases. According to European standards, the content ofbenzene should not exceed 1% in exhaust gases. One of the methods is to remove the benzeneby catalytic hydrogenation to cyclohexane. Selective hydrogenation catalysts of benzene inthe presence of other aromatic compounds may solve this problem. The active and selectiverhodium catalysts of hydrogenation supported on various carriers have been created [1-3].The activities of mono and bimetallic catalysts based on rhodium, palladium and gold werepresented in this work. Various carbon and aluminum-silicates were used as carriers. Thecatalysts were prepared by incipient wetness impregnation and colloidal methods.Hydrogenation was carried out in following conditions: the temperature between 20-80ºC,hydrogen pressure between 20-100 atm in the autoclave. The autoclave supplied with aturbine mixer in an isobar-isothermal mode, with measurement of volume of the absorbedhydrogen. The reaction mixture simulates the system gasoline – benzene approximated to thereal gasoline which corresponds to Euro standards. The reactor allows testing and analyzingsamples during the reaction.The catalysts were characterized by the TEM, ICP, BET and XPS methods. The uniformdistribution of bimetallic particles was determined using TEM with size inthe range 1-5 nanometers. The loss of active metal in comparison with the calculated onewere observed.The bimetallic rhodium and gold catalysts showed their (i) high activity and (ii) the ability ofselective hydrogenation of benzene in the presence of other aromatic compounds, such astoluene, xylene and cumene. Ethanol, octane and water were used as solvents. The highest100