Study Of Strip Molding Ultra Fine Nickel Supported Catalyst For Benzene Hydrogenation

Ultra fine nickel supported catalyst was prepared by sol-gel method in order to develop new and efficient nanoscale nickel supported catalyst. In the subject preliminary research process, sol-gel method catalyst parameters, the physical and chemical properties and the capability for benzene hydrogenation was done a systematic study. The catalyst has excellent physical and chemical properties and it shows the high reactivity and high selectivity in benzene hydrogenation reaction. The catalyst can be used in a wide activity temperature range and scope of the use of the space velocity. This shows that the catalyst demonstrate the superior performance of nano-materials.Based on the preliminary studies, the 40kg catalyst was scale-up prepared and squeezed the molding of 2.5×(3-6) mm thick nickel-based ultrafine supported catalyst. The strip catalyst needs not only the mechanical strength for the industrial application, but also the excellent surface properties, catalytic activity, sulfur resistance and thermal stability. To provide meaningful data for the industrial application, the strip catalyst was crowded with domestic and imported industrial reference catalyst together and conducted with a fixed bed micro-reactor. At the same time, the reaction kinetics and the design project of ultrafine nickel supported catalyst was studied.The study shows that the lateral load intensity of ultrafine nickel-based catalyst is 112N/cm. The surface properties are at the same level with the not molding catalyst. The catalyst has good thermal stability and sulfur resistance. The LNSR reaches 467.25 ul/g and the service life is 3.4 years. Under the same experimental conditions, the strip ultrafine nickel supported catalyst has the same catalytic properties with other industries reference catalysts, in some ways even better than them. The strip ultrafine nickel supported catalyst has demonstrated good prospects for industrial application.The kinetic equation of the was obtained by the kinetic behavior of benzene hydrogenation . r=[5.82*102exp(-5510.00/RT)PBPH1/2]/[1+6.94*10-3exp(20830.00/RT)PB]2. The rationality of the kinetic equation was verified by variance test and Boudart standard. A series of tubular reactor for homogeneous one-dimensional model was set up through a combination of benzene hydrogenation thermodynamic data. The reaction engineering design of the catalyst was studied by Four bands - Runge Kutta method. The hot temperature and the location of the hot reactor was found. The bed reactor best dilution ratio and the number of sections of ultrafine nickel supported catalyst in benzene hydrogenation was obtained. All the studies provide a good foundation for the industrial applications.