Effect of rare earth modification on structure and catalytic properties of SO42-/ZrO2 solid acid catalyst

CHEN Ying; SUN Xue; LI Hui; BAI Yun-bo

Volume 40 Issue 04

Apr. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > (04): 412-417

CHEN Ying, SUN Xue, LI Hui, BAI Yun-bo. Effect of rare earth modification on structure and catalytic properties of SO42-/ZrO2 solid acid catalyst[J]. Journal of Fuel Chemistry and Technology, 2012, (04): 412-417.

Citation:

CHEN Ying, SUN Xue, LI Hui, BAI Yun-bo. Effect of rare earth modification on structure and catalytic properties of SO₄^2-/ZrO₂ solid acid catalyst[J]. Journal of Fuel Chemistry and Technology, 2012, (04): 412-417.

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Effect of rare earth modification on structure and catalytic properties of SO₄^2-/ZrO₂ solid acid catalyst

1.
Critical Laboratory of Oil and Natural Gasprocessing|Northeast Petroleum University|Daqing 163318, China;
2.
Petro China Daqing Oilfield, Daqing 163000, China;
3.
Daqing Petrochemical Engineering Co.,LTD, Daqing 163714, China;
4.
Quality Safety Environmental Place|Daqing Refining &|Chemical Company, Daqing 163411, China

Received Date: 2011-03-11
Rev Recd Date: 2011-07-04
Publish Date: 2012-04-30

Abstract

Abstract

The rare earth-promoted SO₄^2-/ZrO₂solid super acid catalyst was prepared by the co-precipitation and impregnation method under different conditions. The catalytic properties of the samples were evaluated through transesterification of waste oil and methanol and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and BET surface area measurement. The results showed that among all the prepared samples the one that was calcined at 600℃ with La doping 4% had the highest production rate of 64.68%. An analysis of XRD patterns revealed that the incorporation of rare earth into tetragonal zirconia stabilizes the compound, and the calcination at 600℃ increases the reactivity of the catalyst by producing a greater fraction of active tetragonal zirconia with a larger surface area. It could be seen from the FT-IR spectra that super acid structures were formed in the catalysts and the acidity was strengthened remarkably and the activated centre of the catalyst were increased.
- solid super acid,
- rare earth elements,
- biodiesel,
- transesterification,
- calcination temperature

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References(7)

References

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