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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 16, 2009
Accepted December 18, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Dibenzothiophene hydrodesulfurization over MoP/SiO2 catalyst prepared with sol-gel method

Shuwen Gong^† Lijun Liu Haifeng He Qingxin Cui

Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252059, P. R. China

gongshw@lcu.edu.cn

Korean Journal of Chemical Engineering, September 2010, 27(5), 1419-1422(4), 10.1007/s11814-010-0234-3

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Abstract

Silica-supported molybdenum phosphide, MoP/SiO2 catalysts with different Mo weight loadings were prepared by temperature programmed reduction of the oxidic catalyst precursors, which were prepared via sol-gel technique using ethyl silicate-40 as silica source. Samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), BET surface area measurements, and their catalytic activity in hydrodesulfurization (HDS) was tested with dibenzothiophene (DBT) as model compound. XRD analysis revealed the amorphous nature of the catalyst up to 10 wt% Mo loading and the formation of crystalline MoP phase on amorphous silica support with higher Mo loading. BET surface area showed high surface area for catalysts prepared by sol-gel technique with lower Mo content, and the surface area decreased with increasing in Mo loading. The HDS results showed that prepared MoP/SiO2 exhibited high HDS activity and stability toward the catalytic test. Among the series of catalysts prepared, MoP/SiO2 containing 20 wt% Mo was found to be the most active catalyst. And the effects of reaction temperature and hydrogen pressure on conversion and product selectivity were investigated.

Keywords

Dibenzothiophene MoP Hydrodesulfurization

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