快乐的小马回复于2007/04/16
doi:10.1016/0304-5102(93)85041-Q
Copyright © 1993 Published by Elsevier Science B. V. All rights reserved.
Selective hydrogenation of cinnamaldehyde over Ru—Sn catalysts
S. Galvagno
A. Donato, G. Neri and R. Pietropaolo
G. Capannelli
Università di Messina, Dipartimento di Chimica Industriale, Cas. Post. 29, I-98166 Sant'Agata di Messina Italy
Università di Reggio Calabria, Facoltà di Ingegneria, Via Cuzzocrea 48, I-89100 Reggio Calabria Italy
Università di Genova, Dipartimento di Chimica Industriale, Corso Europa 30, Genoa Italy
Received 12 March 1992; accepted 26 May 1992. Available online 14 September 2001.
Abstract
Hydrogenation of cinnamaldehyde has been investigated over a series of Ru—Sn/C catalysts having various Sn/Ru ratios. Addition of tin to Ru/C decreases the CO chemisorption capability of the catalyst. The overall turnover frequency of cinnamaldehyde disappearance and the selectivity to cinnamyl alcohol increase with the Sn/Ru ratio. It is suggested that hydrogenation of the ---C=O group occurs on sites associated with tin ions. On these sites the carbonyl group is polarized, facilitating hydrogen transfer from an adjacent Ru---H site.
原文由 cissypony 发表:
doi:10.1016/0304-5102(93)85041-Q
Copyright © 1993 Published by Elsevier Science B. V. All rights reserved.
Selective hydrogenation of cinnamaldehyde over Ru—Sn catalysts
S. Galvagno
A. Donato, G. Neri and R. Pietropaolo
G. Capannelli
Università di Messina, Dipartimento di Chimica Industriale, Cas. Post. 29, I-98166 Sant'Agata di Messina Italy
Università di Reggio Calabria, Facoltà di Ingegneria, Via Cuzzocrea 48, I-89100 Reggio Calabria Italy
Università di Genova, Dipartimento di Chimica Industriale, Corso Europa 30, Genoa Italy
Received 12 March 1992; accepted 26 May 1992. Available online 14 September 2001.
Abstract
Hydrogenation of cinnamaldehyde has been investigated over a series of Ru—Sn/C catalysts having various Sn/Ru ratios. Addition of tin to Ru/C decreases the CO chemisorption capability of the catalyst. The overall turnover frequency of cinnamaldehyde disappearance and the selectivity to cinnamyl alcohol increase with the Sn/Ru ratio. It is suggested that hydrogenation of the ---C=O group occurs on sites associated with tin ions. On these sites the carbonyl group is polarized, facilitating hydrogen transfer from an adjacent Ru---H site.