Síntese e caracterização de catalisadores de níquel dopados com antimônio

Abstract

The optimization of catalytic activity has been a frequent object of study in the literature. It is observed in the works that the addition of another metal to the catalyst can promote the improvement of the catalytic activity of some monometallic catalysts, which would be beneficial for industrial purposes. In this sense, the present work aims to synthesize and characterize the catalysts made of nickel and antimony in different contents. The characterization was done through Temperature Programmed Reduction (TPR), Temperature Programmed Desorption (TPD) and Hydrogen Adsorption. The catalytic test was carried out for the benzene and toluene hydrogenation reactions and the competitive benzene/toluene hydrogenation reaction under various temperatures. The results show that at 94 oC there was an improvement in the catalytic activity for the toluene hydrogenation reaction at 92 oC for the benzene conversion reaction, showing that the addition of Sb affects the catalytic properties of Ni. In general, the number of data collected did not make it possible to conclude or indicate whether they are electronic or structural effects. However, observations suggest that Ni doping with Sb is an interesting systemfor fundamental science studies.