Study on the structure and performance of MoO<sub>3</sub>-ZrO<sub>2</sub> composite catalysts with different Mo/Zr mass ratios

ZHANG Wei; LIU Xiao-dan; BAI Ying-zhi; WANG Hai-yan; WEI Min

Volume 43 Issue 08

Aug. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(08): 998-1003

ZHANG Wei, LIU Xiao-dan, BAI Ying-zhi, WANG Hai-yan, WEI Min. Study on the structure and performance of MoO3-ZrO2 composite catalysts with different Mo/Zr mass ratios[J]. Journal of Fuel Chemistry and Technology, 2015, 43(08): 998-1003.

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ZHANG Wei, LIU Xiao-dan, BAI Ying-zhi, WANG Hai-yan, WEI Min. Study on the structure and performance of MoO₃-ZrO₂ composite catalysts with different Mo/Zr mass ratios[J]. Journal of Fuel Chemistry and Technology, 2015, 43(08): 998-1003.

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Study on the structure and performance of MoO₃-ZrO₂ composite catalysts with different Mo/Zr mass ratios

1.
School of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China;
2.
Shenyang Research Institute of Chemical Industry, Shenyang 110021, China;
3.
China University of Petroleum (Huadong), Qingdao 266555, China

Received Date: 2015-01-04
Rev Recd Date: 2015-03-26
Publish Date: 2015-08-30

Abstract

Abstract

Mesoporous MoO₃-ZrO₂ composite oxides were prepared by sol-gel method. The influence of the mass ratio of MoO₃/ZrO₂ on the crystal phase, specific surface area, pore size and morphology characteristics were investigated. The synthesized composite oxides were characterized by XRD, BET, SEM and FT-IR. With FCC gasoline fraction as the raw material, the catalytic activity was evaluated by hydrodesulfurization reaction after the prevulcanization of the composite oxides. The results show that the ZrO₂ containing MoO₃ had less monoclinic phase than ZrO₂ and mainly existed in stable tetragonal phase. The appropriate improvement of the mass ratio of MoO₃/ZrO₂ were beneficial to the increase of specific surface area and average pore size. The excessive mass ratio of MoO₃/ZrO₂ depressed the formation of mesopores and produced a new type chemical bond and a small amount of Zr(MoO₄)₂ crystal phase. When the mass ratio of MoO₃/ZrO₂ was 30%, the worm structure appeared on the surface of ZrO₂, and the desulfurization rate reached its maximum. Thus, the appropriate improvement of the mass ratio of MoO₃/ZrO₂ could obtain a higher desulfurization rate.
- sol-gel method,
- MoO₃-ZrO₂ composite oxides,
- mesoporous,
- hydrodesulfurization

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References

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