The Studies on Dispersion States and Adsorption States of Dibenzothiophene Over MoO_3/gamma-Al_2O_3,Catalyst

摘要

Due to more and more strict environmental regulations,the deep hydrodesulfurization(HDS) of diesel oil to produce "cleaner" fuel becomes a major challenge for scientists.Dibenzothiophenes (DBTs,such as dibenzothiophene(DBT),4-methyldibenzothiophene(4-MDBT),4,6-dimethyl-dibenzothiophene(4,6-DMDBT)) are found the refractory compounds to HDS,so the studies of HDS mechanism of DBTs attributes more attention than ever (1 approx 5).However,even now scientists have different ideas on the adsorption states of DBTs over the HDS catalysts and carriers (3 approx 7),as a result,they proposed different HDS mechanism of DBTs.