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The partial gas‐phase hydrogenation of benzene to cyclohexene on supported and coated ruthenium catalysts

Dietzsch, Enrico and Claus, Peter and Hönicke, Dieter (2000):
The partial gas‐phase hydrogenation of benzene to cyclohexene on supported and coated ruthenium catalysts.
In: Topics in Catalysis, Springer Netherlands, pp. 99-106, 10, (1/2), ISSN 10225528,
[Online-Edition: http://dx.doi.org/10.1023/A:1019164001135],
[Article]

Abstract

The conversion of benzene to useful products such as cyclohexene is of industrial interest because of the expected surplus of benzene due to its substitution in gasoline by other nondashpolluting components in the next years. Therefore, the partial gasdashphase hydrogenation of benzene to cyclohexene at atmospheric pressure was performed in order to develop catalysts as an alternative to those used in liquiddashphase hydrogenation. Two types of rutheniumdashcontaining catalysts were investigated, viz. supported catalysts with different support materials and coated catalysts with electrolytically formed alumina as support. In order to yield the desired cyclohexene the presence of methanol as a reaction modifier was necessary in the gas phase during the reaction. The hydrogenation on supported Ru catalysts gave selectivities of about 35%, while on coated Ru catalysts selectivities up to 45% were obtained at conversion degrees of 5%. Improved catalyst performance, especially higher selectivity and yield, was obtained at increased partial pressure of methanol and hydrogen and by addition of copper as second metal in the oxide layer of the coated catalysts.

Item Type: Article
Erschienen: 2000
Creators: Dietzsch, Enrico and Claus, Peter and Hönicke, Dieter
Title: The partial gas‐phase hydrogenation of benzene to cyclohexene on supported and coated ruthenium catalysts
Language: English
Abstract:

The conversion of benzene to useful products such as cyclohexene is of industrial interest because of the expected surplus of benzene due to its substitution in gasoline by other nondashpolluting components in the next years. Therefore, the partial gasdashphase hydrogenation of benzene to cyclohexene at atmospheric pressure was performed in order to develop catalysts as an alternative to those used in liquiddashphase hydrogenation. Two types of rutheniumdashcontaining catalysts were investigated, viz. supported catalysts with different support materials and coated catalysts with electrolytically formed alumina as support. In order to yield the desired cyclohexene the presence of methanol as a reaction modifier was necessary in the gas phase during the reaction. The hydrogenation on supported Ru catalysts gave selectivities of about 35%, while on coated Ru catalysts selectivities up to 45% were obtained at conversion degrees of 5%. Improved catalyst performance, especially higher selectivity and yield, was obtained at increased partial pressure of methanol and hydrogen and by addition of copper as second metal in the oxide layer of the coated catalysts.

Journal or Publication Title: Topics in Catalysis
Volume: 10
Number: 1/2
Publisher: Springer Netherlands
Uncontrolled Keywords: partial hydrogenation - benzene - cyclohexene - ruthenium catalysts - coated catalysts - anodic oxidation - reaction modifier
Divisions: 07 Department of Chemistry > Fachgebiet Technische Chemie > Technische Chemie II
07 Department of Chemistry > Fachgebiet Technische Chemie
07 Department of Chemistry
Date Deposited: 20 Mar 2009 09:02
Official URL: http://dx.doi.org/10.1023/A:1019164001135
Identification Number: doi:10.1023/A:1019164001135
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