Optimization of dendritic TS-1/Silica micro–mesoporous composites for efficient hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene  

作　　者：Cheng-Kun Xiao Yu-Tong Zou Dong-Ze Li En-Hua Wang Ao-Cheng Wang Dao-Wei Gao Ai-Jun Duan Peng Zheng Xi-Long Wang 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing,102249,China [2]School of Chemistry and Chemical Engineering,University of Jinan,Jinan,Shandong,250022,China

出　　处：《Petroleum Science》2023年第4期2521-2530,共10页石油科学（英文版）

基　　金：This research was supported by the Science Foundation of China University of Petroleum-Beijing(No.2462023QNXZ002);the National Key R&D Program of China(2021YFA1501201);the National Natural Science Foundation of China(No.22278174);Independent research project of State Key Laboratory of heavy oil(2021–01);Shandong Excellent Young Scientists Fund Program(Overseas,2022HWYQ-082).

摘　　要：A novel composite material(TD)composed of TS-1 microcrystalline and dendritic mesoporous silica nanospheres(DMSNs)was successfully prepared.The TD composite material had open pore structure and large specific surface area,which was conducive to the mass transfer of reactants and products.The Ti element in TS-1 could be used as an electron assistant,and the spillover d-electrons were conducive to the improvement of the sulfidation and dispersion of MoS_(2),thereby forming more type II MoS_(2) active phases.The incorporation of Ti could bring more Brønsted(B)and Lewis(L)acid,which was conducive to the hydrogenation pathway(HYD)selectivity(41.2%)of dibenzothiophene(DBT)hydrodesulfurization(HDS)and isomerization(ISO)route selectivity(21.9%)of 4,6-dimethyldibenzothiophene(4,6-DMDBT)HDS,thus improve the HDS activity of DBT and 4,6-DMDBT.NiMo/TD-70(Aging temperature=70℃)had the best HDS activities of DBT(99.0%)and 4,6-DMDBT(93.7%)due to its large open pore structure,good acidity,suitable metal-support interaction(MSI)and perfect dispersion of the metallic active sites.

关 键 词：Dendritic TS-1-DMSNs composites NiMo/TD catalysts Dibenzothiophene4 6-Dimethyldibenzothiophene HYDRODESULFURIZATION 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]