Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst

SONG Hua; ZHANG Yong-jiang; SONG Hua-lin; DAI Min

Volume 40 Issue 10

Oct. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(10): 1246-1251

SONG Hua, ZHANG Yong-jiang, SONG Hua-lin, DAI Min. Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1246-1251.

Citation:

SONG Hua, ZHANG Yong-jiang, SONG Hua-lin, DAI Min. Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1246-1251.

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Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst

1.
College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China;
2.
Provincial Key Laboratory of Oil & Gas Chemical Technology, Northeast Petroleum University, Daqing 163318, China;
3.
Department of Image School, Mudanjiang Medical University, Mudanjiang 157011, China

Received Date: 2012-02-08
Rev Recd Date: 2012-04-12
Publish Date: 2012-10-31

Abstract

Abstract

The TiO₂-Al₂O₃ complex support was prepared by the sol-gel method. A nickel phosphide catalyst, Ni₂P/TiO₂-Al₂O₃ with citric acid (CA) as chelating agent, was prepared by the impregnation method. The catalysts were characterized by X-ray diffraction (XRD), N₂-adsorption specific surface area measurements (BET), thermogravimetry-differential thermal analysis (TG-DTA), temperature programmed reduction (TPR) and transmission electron microscope (TEM). The effects of different chelating agents and CA addition for dibenzothiophene (DBT) hydrodesulfurization (HDS) were studied. The result showed that the addition of appropriate amount of CA into the catalyst can enrich the pores of Ni₂P/TiO₂-Al₂O₃ catalyst, increase the surface area, which made better pore structure, higher dispersion of metal active component and more uniform size of the active component. CA can weaken the interaction between the active phase and the support, resulting in an apparent decrease in reduction temperature for nickel and phosphorus precursor as well as promotion of the formation of the Ni-P-O active phase. At reaction temperature of 360℃, pressure of 3.0 MPa, hydrogen/oil ratio of 500(volume ratio), liquid hourly space velocity of 2.0 h^-1 and reaction time of 4 h, the initial dibenzothiophene conversion was 99.5% and stabilized at about 95.0% during 48 h reaction.
- nickel phosphide,
- titanium dioxide,
- aluminium trioxide,
- hydrodesulfurization,
- citric acid,
- chelating agent

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References(26)

References

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