Synthesis of highly ordered TiO2-Al2O3 and catalytic performance of its supported NiMo for HDS of 4, 6-dimethyldibenzothiophene

被引:15
作者
Zhang, Pengfei [1 ]
Mu, Fujun [1 ]
Zhou, Yasong [1 ]
Wei, Qiang [1 ]
Liu, Xiaodong [1 ]
You, Qingxiang [1 ]
Shan, Yacheng [1 ]
Zhou, Wuwen [2 ]
机构
[1] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China
[2] Xian Univ Sci & Technol, Sch Chem & Chem Engn, Xian 710054, Peoples R China
关键词
Evaporation -induced self -assembly; Hydrodesulfurization; 6-Dimethyldibenzothiophene; ONE-POT SYNTHESIS; ULTRA-DEEP HYDRODESULFURIZATION; SOL-GEL METHOD; NIMO/TIO2-AL2O3; CATALYSTS; HYDROTREATING CATALYSTS; BINARY OXIDES; CITRIC-ACID; DIBENZOTHIOPHENE; ALUMINA; MO;
D O I
10.1016/j.cattod.2020.03.003
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The highly ordered mesoporous TiO2-Al2O3 composite oxides were prepared via a facile evaporation-induced self-assembly (EISA) method. All of those synthesized materials were characterized by means of XRD, XRF, N2 adsorption, FTIR, Py-FTIR and TEM. The results show that the hexagonally ordered mesoporous TiO2-Al2O3 oxides with high specific surface area, high thermal stability and narrow pore size distributions were successfully synthesized by EISA. The corresponding NiMo catalysts supported on TiO2-Al2O3 oxides were further characterized by H2-TPR, HRTEM and XPS. Their hydrodesulfurization catalytic performances were tested in a fixedbed reactor, using 4,6-dimethyldibenzothiophene as the probe. The analyzing results exhibit that the incorporation of TiO2 could effective weaken the support-metal interactions, thus enhancing the reduction degree of active metals and forming more "Type II" Ni-Mo-S active phases that would be beneficial for the HDS of highly refractory organosulfur compound. The catalytic results reveal that the 4,6-DMDBT conversion over NiMo/TA-n catalysts gradually increased as the Ti/Al molar ratio increases, and reaches a maximum values at NiMo/TA-0.4. The NiMo/TA-0.4 exhibited the highest hydrodesulfurization catalytic performance of 4,6-DMDBT due to the synergistic effect of suitable textural properties, high thermal stability and moderate metal-support interactions.
引用
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页数:11
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