首页|Al-modified yolk-shell silica particle-supported NiMo catalysts for ultradeep hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene:Efficient accessibility of active sites and suitable acidity

Al-modified yolk-shell silica particle-supported NiMo catalysts for ultradeep hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene:Efficient accessibility of active sites and suitable acidity

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Yolk-shell SiO2 particles(YP)with center-radial meso-channels were fabricated through a simple and effective method.Al-containing YP-supported NiMo catalysts with different Al amounts(NiMo/AYP-x,x=Si/Al molar proportion)were prepared and dibenzothiophene(DBT)and 4,6-dimethyl-dibenzo-thiophene(4,6-DMDBT)were employed as the probes to evaluate the hydrodesulfurization(HDS)cat-alytic performance.The as-prepared AYP-x carriers and corresponding catalysts were characterized by some advanced characterizations to obtain deeper correlations between physicochemical properties and the HDS performance.The average pore sizes of series AYP-x supports are above 6.0 nm,which favors the mass transfer of organic sulfides.The cavity between the yolk and the shell is beneficial for the enrichment of S-containing compounds and the accessibility between reactants and active metals.Aluminum embedded into the silica framework could facilitate the formation of Lewis(L)and Brønsted(B)acid sites and adjust the metal-support interaction(MSI).Among all the as-synthesized catalysts,NiMo/AYP-20 catalyst shows the highest HDS activities.The improved HDS activity of NiMo/AYP-20 catalyst is attributed to the perfect combination of excellent structural properties of the yolk-shell mesoporous silica,enhanced acidity,moderate MSI,and good accessibility/dispersion of active components.

Al-containing yolk-shell silica particlesAccessibilityAcidityMetal-support interactionHydrodesulfurization

Ke Yu、Wei-Min Kong、Zhen Zhao、Ai-Jun Duan、Lian Kong、Xi-Long Wang

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State Key Laboratory of Heavy Oil Processing China University of Petroleum,Beijing 102249,China

Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering Shenyang Normal University,Shenyang 110034,Liaoning China

国家自然科学基金国家自然科学基金国家自然科学基金funds that Central Government Guides Local science and Technology DevelopmentScientific Research Project of Education Department of Liaoning Province

U190820491845201220020932022JH6/100100052LQN202006

2024

10.1016/j.petsci.2023.08.007

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(1)
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