Preparation and high performance of La2O3-V 2O5/MCM-41 catalysts for ethylbenzene dehydrogenation in the presence of CO2

B. S. Liu; R. Z. Chang; L. Jiang; W. Liu; Chak Tong AU

doi:10.1021/jp802526z

Preparation and high performance of La₂O₃-V ₂O₅/MCM-41 catalysts for ethylbenzene dehydrogenation in the presence of CO₂

B. S. Liu, R. Z. Chang, L. Jiang, W. Liu, Chak Tong AU

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

51 Citations (Scopus)

Abstract

A series of La₂O₃-V₂O₅/MCM-41 catalysts with high specific surface area were prepared by means of incipient wetness impregnation for the dehydrogenation of ethylbenzene to styrene using CO₂ as oxidant. At 600 °C, the conversion of ethylbenzene and selectivity to styrene over 10La15V/MCM-41 after an on-stream time of 4 h was about 86.5 and 91.0%, respectively. The properties of the catalysts before and after the reaction were characterized using techniques such as X-ray diffraction, specific surface area, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption, and oxidation. The high catalytic activity and stability of 10La15V/MCM-41 during dehydrogenation of ethylbenzene is attributed to an optimized La/V atomic ratio. The accumulation of amorphous carbon species on the external surface of La₂O₃-V ₂O₅/MCM-41 is the cause for catalyst deactivation.

Original language	English
Pages (from-to)	15490-15501
Number of pages	12
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	39
DOIs	https://doi.org/10.1021/jp802526z
Publication status	Published - 2 Oct 2008

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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@article{d5fcef97f09d47bea2a29838bee8547e,

title = "Preparation and high performance of La2O3-V 2O5/MCM-41 catalysts for ethylbenzene dehydrogenation in the presence of CO2",

abstract = "A series of La2O3-V2O5/MCM-41 catalysts with high specific surface area were prepared by means of incipient wetness impregnation for the dehydrogenation of ethylbenzene to styrene using CO2 as oxidant. At 600 °C, the conversion of ethylbenzene and selectivity to styrene over 10La15V/MCM-41 after an on-stream time of 4 h was about 86.5 and 91.0%, respectively. The properties of the catalysts before and after the reaction were characterized using techniques such as X-ray diffraction, specific surface area, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption, and oxidation. The high catalytic activity and stability of 10La15V/MCM-41 during dehydrogenation of ethylbenzene is attributed to an optimized La/V atomic ratio. The accumulation of amorphous carbon species on the external surface of La2O3-V 2O5/MCM-41 is the cause for catalyst deactivation.",

author = "Liu, {B. S.} and Chang, {R. Z.} and L. Jiang and W. Liu and AU, {Chak Tong}",

note = "We thank the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, China (2002-247) for financial support, and the CSAR of HKBU for BET, XPS, and XRD investigations, and the Analytical Center of TJU for FT-IR and TEM analyses. ",

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doi = "10.1021/jp802526z",

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AU - Liu, B. S.

AU - Chang, R. Z.

AU - Jiang, L.

AU - Liu, W.

AU - AU, Chak Tong

N1 - We thank the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry, China (2002-247) for financial support, and the CSAR of HKBU for BET, XPS, and XRD investigations, and the Analytical Center of TJU for FT-IR and TEM analyses.

PY - 2008/10/2

Y1 - 2008/10/2

N2 - A series of La2O3-V2O5/MCM-41 catalysts with high specific surface area were prepared by means of incipient wetness impregnation for the dehydrogenation of ethylbenzene to styrene using CO2 as oxidant. At 600 °C, the conversion of ethylbenzene and selectivity to styrene over 10La15V/MCM-41 after an on-stream time of 4 h was about 86.5 and 91.0%, respectively. The properties of the catalysts before and after the reaction were characterized using techniques such as X-ray diffraction, specific surface area, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption, and oxidation. The high catalytic activity and stability of 10La15V/MCM-41 during dehydrogenation of ethylbenzene is attributed to an optimized La/V atomic ratio. The accumulation of amorphous carbon species on the external surface of La2O3-V 2O5/MCM-41 is the cause for catalyst deactivation.

AB - A series of La2O3-V2O5/MCM-41 catalysts with high specific surface area were prepared by means of incipient wetness impregnation for the dehydrogenation of ethylbenzene to styrene using CO2 as oxidant. At 600 °C, the conversion of ethylbenzene and selectivity to styrene over 10La15V/MCM-41 after an on-stream time of 4 h was about 86.5 and 91.0%, respectively. The properties of the catalysts before and after the reaction were characterized using techniques such as X-ray diffraction, specific surface area, Fourier transform infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, temperature-programmed desorption, and oxidation. The high catalytic activity and stability of 10La15V/MCM-41 during dehydrogenation of ethylbenzene is attributed to an optimized La/V atomic ratio. The accumulation of amorphous carbon species on the external surface of La2O3-V 2O5/MCM-41 is the cause for catalyst deactivation.

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DO - 10.1021/jp802526z

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AN - SCOPUS:54249102692

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VL - 112

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JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 39

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Preparation and high performance of La₂O₃-V ₂O₅/MCM-41 catalysts for ethylbenzene dehydrogenation in the presence of CO₂

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