Study on the network of dibenzothiophene hydrogenation using phosphide catalyst
Huang Peng
Abstract：In order to research the network of dibenzothiophene hydrogenation using phosphide catalyst,molecular sieve SBA-15 was used as the supporter to prepare the nickel phosphide catalyst by incipient impregnation method.The Ni/P mole ratio was 1.25,and catalysts with different loading of nickel phosphide were characterized.Model compound dibenzothiophene with 1％ concentration was used to conduct the hydrogenation experiment,the phosphide catalyst was evaluated on a 20 mL fixed bed hydrogenation equipment.The results show that compared with the ordinary commercial catalyst,phosphide catalysts have a higher conversion rate on diben zothiophene at low temperature,which could reach more than 80％ at 280 ℃.The existence of quinoline presents a strong inhibitory effect on the hydrogenation of dibenzothiophene,and thus the conversion rate is reduced from 100％ to 70％ at 320 ℃.The selectivity of biphenyl and cyclohexylbenzene are very small,and the transformation of dibenzothiophene is almost entirely via the direct desulfurization pathway.The phosphide catalyst has higher hydrogenolysis capacity and better direct desulfurization selectivity.
Keywords：direct coal liquefaction oilphosphide catalystdibenzothiophenehydrodesulfurizationproducts distribution
Publication Date：2017-01-01