Effect of phosphorus adding manners on the performance of NiMo/Al2O3 catalyst in hydrodesulfurization

被引：0

作者：

Wang P. ^{[1
]}

Qin Z. ^{[1
,2
,3
]}

Wu Q. ^{[4
]}

Li C. ^{[1
]}

Miao M. ^{[1
]}

Chang L. ^{[1
]}

Sun P. ^{[2
]}

Zeng J. ^{[2
]}

Wang L. ^{[2
]}

Xie K. ^{[1
]}

机构：

[1] Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan

[2] Postdoctoral Research Station, Environmental Planning Institute of Shanxi Province, Taiyuan

[3] Environmental Science and Engineering Postdoctoral Mobile Station, Tsinghua University, Beijing

[4] Daosheng Xinyu Clean Energy Company Limited, Kelan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 02期

关键词：

Coke oven gas; Hydrodesulfurization; Phosphorus; Reactivity; Support; Thiophene;

D O I：

10.16085/j.issn.1000-6613.2020-0584

中图分类号：

学科分类号：

摘要：

NiMo/Al2O3 catalysts modified by phosphorus addition in different manners were prepared by step impregnation method. The effect of these catalysts on the performance of thiophene hydrodesulfurization (HDS) in coke oven gas was investigated on a fixed bed microreactor. The catalysts were characterized by BET, XRD, H2-TPR, NH3-TPD, C4H4S(H2)-TPD, XPS, HRTEM and Raman. The results showed that the HDS performance of the NiMo/Al2O3 catalysts was greatly different. The weak adsorption dissociation on the activity sites of the catalysts of PNi-Mo/Al and PMo-Ni/Al was enhanced, and the catalysts had better low temperature HDS activity. When the simulated coke oven gas containing 292.5mg/m3 thiophene was used as raw material, the desulfurization rate of thiophene by PNi-Mo/Al at 250℃ was more than 61%. For PNi-Mo/Al and PMo-Ni/Al catalysts, the first impregnation of P and Ni or P and Mo made P preferentially interact with Al2O3, and weakened the interactions between Ni or Mo with the support of the active metal component but not too much so that the Ni or Mo could evenly disperse on the surface of the support, and hence NiMoO4 were generated which can promote the formation of type Ⅱ active phase Ni-Mo-S by the sulfidation of Ni in the catalyst. The synergistic effect between NiMoO4 and MoO3 increased the sulfidation of the catalyst, resulting in the increased HDS activity. © 2021, Chemical Industry Press Co., Ltd. All right reserved.

引用

页码：890 / 900

页数：10

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