B-doped Al2O3@C support for CoMo hydrodesulfurization catalyst and their hydrodesulfurization performance

被引：0

作者：

Yu Z. ^{[1
]}

Huang W. ^{[1
]}

Wang X. ^{[1
]}

Deng K. ^{[1
]}

Wei Q. ^{[1
]}

Zhou Y. ^{[1
]}

Jiang P. ^{[2
]}

机构：

[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing

[2] CNPC Kunlun Captial Co., Ltd., Haikou

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 07期

关键词：

alumina; catalyst support; composites; hydrodesulfurization;

D O I：

10.16085/j.issn.1000-6613.2022-1575

中图分类号：

学科分类号：

摘要：

The surface properties of alumina support have been modified by introducing a heterogeneous carbon layer and doped boron by the method of carbon predeposition through precursor pyrolysis, with which the corresponding CoMo supported hydrodesulfurization (HDS) catalysts were then prepared. The physical-chemical properties of the modified Alumina and the series CoMo supported catalysts were characterized by using XRD, N2-adsorption-desorption (BET), Py-FTIR, H2-TPR, HRTEM, and XPS, and their HDS catalytic performance for the model compound DBT was assessed. The results showed that the introduction of carbon layer could effectively reduce the —OH functional group on the alumina support surface, and then regulate the acidity of alumina and the interaction between active metal and support (MSI), avoiding the formation of CoAl2O4 spinel. The doping of heteroatom B could produce more defect sites on the surface of the support, enhance the degrees of sulfidation and the dispersion of Mo species, and form more “Type Ⅱ” CoMoS active phase which was beneficial for the HDS of highly refractory organosulfur compounds. For DBT at 270℃ and 4,6-DMDBT at 290℃, with space velocity of 4h−1, the HDS conversions on CoMo-Al2O3@BC reached 83.42% and 69.98%, respectively, which were 13.67% and 10.40% higher than those of CoMo-Al2O3 catalyst. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：3550 / 3560

页数：10

共 37 条

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