Nickel Based Catalyst For Thiophene Hydrodesulfurization And Benzene Hydrogenation Supported On Ti-pillared Bentonite

Bentonite is a kind of natural clay mineral resources, which can be modified with acid or pillared with inorganic polyhydroxocations according to the need. In this way, its properties can be improved by chaning the structure of exchangeable cations, to be widely applied in many fields and science. As a kind of novel composite materials, the modified benonite can be widely applied in many fields and science. In this paper, initially, we selected the hydrodesulfurization of thiophene as a probe reaction to test the catalytic activity of Ni2P catalysts supported on different supports. We found that Ni2P/bentonites had higher activity than Ni2P/Al2O3, Ni2P/SiO2. At lower temperature, Ni-P of Ni2P/pillared bentonites can be reduced to Ni2P, but not other Ni-P compounds, and Ni2P can be highly dispersed on the supports. Therefore, the pillared bentonite is a promising supports of thiophene hydrodesulfurization reaction.Secondly, we selected the benzene hydrogenation as a probe reaction to test the catalytic activity of Ni catalysts supported on Al2O3and Ti-pillared bentonites with rare earth additives.The results showed Ni/Ti-NaBen and Ni/Re-Ti-NaBen both had higher activity than Ni2P/Al2O3. Compare with Ni/Ti-NaBen, rare earth additives have a great influence for the catalytic activity of Ni catalysts, and the La additives can improve the catalytic activity of Ni catalysts.Lastly, we selected the benzene hydrogenation as a probe reaction to test the catalytic activity of Ni catalysts supported on Fe-Ti-pillared bentonites. The results showed that Fe only affected the reduction of Ni species, but not improved the catalytic activity of Ni catalysts.