Hydrodesulfurization catalyst prepared by urea-matrix combustion method

作     者：Dongmei Jiao YeyongMa Fahai Cao Dongmei Jiao;Yeyong Ma;Fahai Cao

作者机构：School of Chemical EngineeringEast China University of Science and Technology130 Meilong RoadShanghaiChina Luoyang Petrochemical Complex of SINOPEC1 Zhongyuan RoadLuoyangChina Petro-Cyber Works Information Technology Co.Ltd.192 Eshan RoadShanshaiChina 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2012年第10卷第4期

页      面：468-474页

核心收录：

学科分类：07[理学] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 070104[理学-应用数学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0701[理学-数学] 0702[理学-物理学] 

基　　金：East China University of Science and Technology  ECUST 

主　　题：HydrodesulfurizationCo Mo catalystAl2O3 TiO2 supportUrea matrix combustion methodPreparation 

摘      要：Co-Mo/γ-Al2O3-TiO2 hydrodesulfurization （HDS） catalyst samples prepared by a urea matrix combustion （UMxC） method, were evaluated in a stainless tubular fixed-bed reactor, with thiophene, benzothiophene and dibenzothiophene in xylene as model feedstocks. The samples were pre-sulfurized using a cyclohex- ane solution of 3% CS2 and then tested for the HDS reaction. The test results were compared with catalysts prepared by conventional methods involving sequential impregnation （SI） and co-impregnation （CI）. The catalysts were characterized using X-ray diffraction （XRD）, laser Raman spectroscopy （LRS）, high resolu- tion transmission electron microscopy （HRTEM） and N2 physisorption, showing that the UMxC catalyst had higher pore volume and surface area than those prepared by the CI and SI methods. The UMxC method increased metal loading and avoided formation of inert phase, e.g., β-CoMoO4, for the HDS reaction, sug- gesting that UMxC method is superior to the conventional impregnation techniques. TiO2 promoter made particles on the catalyst surface closer and alleviated the interaction between molybdenum oxide and the support, and facilitated the formation of well-dispersed Co- and Mo-oxo species on catalyst surface, thus resulting in higher HDS catalytic activity than pure γ-Al2O3 support without modifiers. Consequently, the addition of TiO2 obviously improved the HDS conversion of dibenzothiophene.