Tuning active sites in MoS_(2)-based catalysts via H_(2)O_(2)etching to enhance hydrodesulfurization performance  

作　　者：Shui-Sen He Ting-Ting Huang Chao Chen Yu Fan 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China [2]State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering,Qingdao University of Science and Technology,Zhengzhou Road 53,Qingdao,266042,Shandong,China

出　　处：《Petroleum Science》2023年第6期3875-3886,共12页石油科学（英文版）

基　　金：support of the National Natural Science Foundation of China(Grant Nos.21978323 and 22108145).

摘　　要：A H_(2)O_(2)etching strategy was adopted to introduce coordinatively unsaturated sites(CUS)on MoS_(2)-based catalysts for dibenzothiophene(DBT)hydrodesulfurization(HDS).The CUS concentrations on MoS_(2) slabs were finely regulated by changing the concentrations of H_(2)O_(2)solution.With the increasing H_(2)O_(2)concentrations(0.1–0.3 mol/L),The CUS concentrations on MoS_(2) slabs increased gradually.However,the high-concentration H_(2)O_(2)etching(0.5 mol/L)increased the MoOxSy and MoO_(3) contents on MoS_(2) slabs compared to etching with the H_(2)O_(2)concentration of 0.3 mol/L,which led to the less CUS concentration in the sulfided Mo–H-0.5 catalyst than in the sulfided Mo–H-0.3 catalyst.A microstructure-activity correlation indicated that the CUS introduced by H_(2)O_(2)etching on MoS_(2) slabs significantly enhanced DBT HDS.Different Co loadings were further introduced into Mo–H-0.3,which had the most CUS concentration,and the corresponding 0.2-CoMo catalyst with the highest CoMoS content(3.853 wt%)exhibited the highest reaction rate constant of 6.95×10^(−6)mol g^(−1)s^(−1)among these CoMo catalysts.

关 键 词：H_(2)O_(2)etching Coordinatively unsaturated site concentrations COMOS HYDRODESULFURIZATION 

分 类 号：TE62[石油与天然气工程—油气加工工程]