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Prevention of Catalyst Deactivation in the Hydrogenolysis of Glycerol by Ga₂O₃-Modified Copper/Zinc Oxide Catalysts

Bienholz, Arne and Blume, Raoul and Knop-Gericke, Axel and Giergsdies, Frank and Behrens, Malte and Claus, Peter (2011):
Prevention of Catalyst Deactivation in the Hydrogenolysis of Glycerol by Ga₂O₃-Modified Copper/Zinc Oxide Catalysts.
In: Journal of Physical Chemistry C, pp. 999-1005, 115, (4), [Online-Edition: http://dx.doi.org/10.1021/jp104925k],
[Article]

Abstract

Copper/zinc oxide catalysts prepared by coprecipitation were proved to be highly active and selective in the hydrogenolysis of glycerol. However, they suffer from strong deactivation in the course of reaction. Modifying the CuO/ZnO catalyst with Ga2O₃ extremely enhances the stability of the catalyst as even after four consecutive experiments over a Cu/ZnO/Ga₂O₃ catalyst no deactivation is observed. The catalysts were characterized by temperature-programmed reduction, powder X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy coupled with energy-dispersive X-ray analysis, and inductively coupled plasma optical emission spectrometry. As the Cu/ZnO/Ga₂O₃ catalyst is stable even under harsh reaction conditions of 220 °C and in the presence of water, a space-time-yield as high as 22.1 gpropylene glycol/(gCu h) can be obtained.

Item Type: Article
Erschienen: 2011
Creators: Bienholz, Arne and Blume, Raoul and Knop-Gericke, Axel and Giergsdies, Frank and Behrens, Malte and Claus, Peter
Title: Prevention of Catalyst Deactivation in the Hydrogenolysis of Glycerol by Ga₂O₃-Modified Copper/Zinc Oxide Catalysts
Language: English
Abstract:

Copper/zinc oxide catalysts prepared by coprecipitation were proved to be highly active and selective in the hydrogenolysis of glycerol. However, they suffer from strong deactivation in the course of reaction. Modifying the CuO/ZnO catalyst with Ga2O₃ extremely enhances the stability of the catalyst as even after four consecutive experiments over a Cu/ZnO/Ga₂O₃ catalyst no deactivation is observed. The catalysts were characterized by temperature-programmed reduction, powder X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy coupled with energy-dispersive X-ray analysis, and inductively coupled plasma optical emission spectrometry. As the Cu/ZnO/Ga₂O₃ catalyst is stable even under harsh reaction conditions of 220 °C and in the presence of water, a space-time-yield as high as 22.1 gpropylene glycol/(gCu h) can be obtained.

Journal or Publication Title: Journal of Physical Chemistry C
Volume: 115
Number: 4
Divisions: 07 Department of Chemistry > Fachgebiet Technische Chemie > Technische Chemie II
07 Department of Chemistry > Fachgebiet Technische Chemie
07 Department of Chemistry
Date Deposited: 18 Oct 2010 13:48
Official URL: http://dx.doi.org/10.1021/jp104925k
Identification Number: doi:10.1021/jp104925k
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