Dehydrogenation of ethylbenzene with carbon dioxide over MgO-modified Al2O3-supported V-Sb oxide catalysts

Do Young Hong; Vladislav P. Vislovskiy; Young Kyu Hwang; Sung Hwa Jhung; Jong San Chang

doi:10.1016/j.cattod.2007.10.020

Dehydrogenation of ethylbenzene with carbon dioxide over MgO-modified Al₂O₃-supported V-Sb oxide catalysts

Do Young Hong, Vladislav P. Vislovskiy, Young Kyu Hwang, Sung Hwa Jhung, Jong San Chang

Korea Research Institute of Chemical Technology

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Alumina-supported V_0.43Sb_0.57 oxide (VSb/Al) and MgO-modified alumina-supported V_0.43Sb_0.57 oxide catalysts (VSb/Mg_nAl with Mg/Al atomic ratio, n = 0.1, 0.3 or 0.5) have been tested for the dehydrogenation of ethylbenzene with carbon dioxide as an oxidant. Their catalytic behaviors were interpreted by results of several catalyst characterization methods. The decrease in the surface acidity of the VSb/Mg_nAl catalysts due to modification of alumina with MgO favors the prolonged time-on-stream activities. However, the addition of relatively large amounts of MgO (n = 0.3 or 0.5) causes substantial decrease in their surface areas, reducibility of active vanadium oxide component and, consequently, ethylbenzene conversion. These negative factors did not become apparent for the most efficient VSb/Mg_0.1Al system demonstrating high and stable catalytic activity.

Original language	English
Pages (from-to)	140-145
Number of pages	6
Journal	Catalysis Today
Volume	131
Issue number	1-4
DOIs	https://doi.org/10.1016/j.cattod.2007.10.020
State	Published - 29 Feb 2008

Keywords

Carbon dioxide
Dehydrogenation
Ethylbenzene
MgO-modified alumina support
Styrene
Supported V-Sb oxide catalysts

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10.1016/j.cattod.2007.10.020

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title = "Dehydrogenation of ethylbenzene with carbon dioxide over MgO-modified Al2O3-supported V-Sb oxide catalysts",

abstract = "Alumina-supported V0.43Sb0.57 oxide (VSb/Al) and MgO-modified alumina-supported V0.43Sb0.57 oxide catalysts (VSb/MgnAl with Mg/Al atomic ratio, n = 0.1, 0.3 or 0.5) have been tested for the dehydrogenation of ethylbenzene with carbon dioxide as an oxidant. Their catalytic behaviors were interpreted by results of several catalyst characterization methods. The decrease in the surface acidity of the VSb/MgnAl catalysts due to modification of alumina with MgO favors the prolonged time-on-stream activities. However, the addition of relatively large amounts of MgO (n = 0.3 or 0.5) causes substantial decrease in their surface areas, reducibility of active vanadium oxide component and, consequently, ethylbenzene conversion. These negative factors did not become apparent for the most efficient VSb/Mg0.1Al system demonstrating high and stable catalytic activity.",

keywords = "Carbon dioxide, Dehydrogenation, Ethylbenzene, MgO-modified alumina support, Styrene, Supported V-Sb oxide catalysts",

author = "Hong, {Do Young} and Vislovskiy, {Vladislav P.} and Hwang, {Young Kyu} and Jhung, {Sung Hwa} and Chang, {Jong San}",

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doi = "10.1016/j.cattod.2007.10.020",

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T1 - Dehydrogenation of ethylbenzene with carbon dioxide over MgO-modified Al2O3-supported V-Sb oxide catalysts

AU - Hong, Do Young

AU - Vislovskiy, Vladislav P.

AU - Hwang, Young Kyu

AU - Jhung, Sung Hwa

AU - Chang, Jong San

PY - 2008/2/29

Y1 - 2008/2/29

N2 - Alumina-supported V0.43Sb0.57 oxide (VSb/Al) and MgO-modified alumina-supported V0.43Sb0.57 oxide catalysts (VSb/MgnAl with Mg/Al atomic ratio, n = 0.1, 0.3 or 0.5) have been tested for the dehydrogenation of ethylbenzene with carbon dioxide as an oxidant. Their catalytic behaviors were interpreted by results of several catalyst characterization methods. The decrease in the surface acidity of the VSb/MgnAl catalysts due to modification of alumina with MgO favors the prolonged time-on-stream activities. However, the addition of relatively large amounts of MgO (n = 0.3 or 0.5) causes substantial decrease in their surface areas, reducibility of active vanadium oxide component and, consequently, ethylbenzene conversion. These negative factors did not become apparent for the most efficient VSb/Mg0.1Al system demonstrating high and stable catalytic activity.

AB - Alumina-supported V0.43Sb0.57 oxide (VSb/Al) and MgO-modified alumina-supported V0.43Sb0.57 oxide catalysts (VSb/MgnAl with Mg/Al atomic ratio, n = 0.1, 0.3 or 0.5) have been tested for the dehydrogenation of ethylbenzene with carbon dioxide as an oxidant. Their catalytic behaviors were interpreted by results of several catalyst characterization methods. The decrease in the surface acidity of the VSb/MgnAl catalysts due to modification of alumina with MgO favors the prolonged time-on-stream activities. However, the addition of relatively large amounts of MgO (n = 0.3 or 0.5) causes substantial decrease in their surface areas, reducibility of active vanadium oxide component and, consequently, ethylbenzene conversion. These negative factors did not become apparent for the most efficient VSb/Mg0.1Al system demonstrating high and stable catalytic activity.

KW - Carbon dioxide

KW - Dehydrogenation

KW - Ethylbenzene

KW - MgO-modified alumina support

KW - Styrene

KW - Supported V-Sb oxide catalysts

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DO - 10.1016/j.cattod.2007.10.020

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JO - Catalysis Today

JF - Catalysis Today

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ER -

Dehydrogenation of ethylbenzene with carbon dioxide over MgO-modified Al₂O₃-supported V-Sb oxide catalysts

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