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Selective hydrogenation of dimethyl adipate on titania-supported RuSn catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43085 45954 2009 6 PDF Available
Title
Selective hydrogenation of dimethyl adipate on titania-supported RuSn catalysts
Abstract

The hydrogenation of dimethyl adipate over RuSn/TiO2 catalysts was studied to examine the effect of tin species and titania on selective production of 1,6-hexanediol. The bimetallic catalysts were prepared by co-impregnation and the reaction was carried out in a liquid phase semi-batch reactor at moderate conditions (255 °C and 50 bar). The optimal Sn/Ru ratio to reach maximum selectivity changed according to the catalyst reduction temperature. A remarkable selectivity of 70% of 1,6-hexanediol was accomplished over the catalyst with Sn/Ru ratio of 2 and reduced at 400 °C. The characterization of the bimetallic catalysts reduced at such a high temperature was performed by Mössbauer spectroscopy and it was found that all systems presented a similar distribution of tin species and no entity revealed to be preferentially formed. The establishment of strong-metal–support interaction and thus a synergistic effect between TiOx moieties and Snn+ species was suggested to determine the reaction pathway.

Graphical abstractThe hydrogenation of dimethyl adipate over RuSn/TiO2 catalysts was studied to examine the effect of tin species and titania on selective production of 1,6-hexanediol. It was found that the optimal Sn/Ru ratio to reach maximum selectivity changed according to the catalyst reduction temperature. A remarkable selectivity of 70% of 1,6-hexanediol was accomplished over the catalyst with Sn/Ru ratio of 2 and reduced at 400 °C. It was concluded that all systems presented a similar distribution of tin species and no entity revealed to be preferentially formed. The establishment of strong-metal–support interaction and thus a synergistic effect between TiOx moieties and Snn+ species was suggested to determine the reaction pathway.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Dimethyl adipate; 1,6-Hexanediol; Titania; Metal–support interaction; RuSn catalysts; Selective hydrogenation
First Page Preview
Selective hydrogenation of dimethyl adipate on titania-supported RuSn catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 353, Issue 1, 31 January 2009, Pages 101–106
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis