Deuterium kinetic isotopic study for hydrogenolysis of ethyl butyrate |
| |
| Authors: | Muthu Kumaran Gnanamani Gary Jacobs Robert A Keogh Burtron H Davis |
| |
| Affiliation: | 1. Institute of Materials and Environmental Chemistry, Research Center for Natural Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary;2. Department of MOL Hydrocarbon and Coal Processing, University of Pannonia, Egyetem utca 10, H-8200, Veszprém, Hungary;1. Catalysis Laboratory, Chemical Engineering Department, Federal University of São Carlos, São Carlos, SP 13565-905, Brazil;2. PETROBRAS S.A. – R & D Center (CENPES), Av. Horácio Macedo, 950, Cidade Universitária, Rio de Janeiro, RJ 21941-915, Brazil;1. School of Materials Science and Engineering, Nankai University, Tianjin 300350, China;2. Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education, Nankai University, Tianjin 300071, China |
| |
| Abstract: | The hydrogenation of ethyl butyrate, n-butyric acid, and n-butyraldehyde to their corresponding alcohol(s) has been studied over a γ-Al2O3-supported cobalt catalyst using a high-pressure fixed-bed reactor in the temperature range of 473–493 K. H2–D2–H2 switching experiments show that ethyl butyrate and n-butyric acid follow an inverse kinetic isotope effect (KIE) (i.e. rH/rD = 0.50–0.54), whereas n-butyraldehyde did not display any KIE (i.e. rH/rD = 0.98). DRIFTS experiments were performed over the support and catalyst to monitor the surface species formed during the adsorption of ethyl butyrate and n-butyric acid at atmospheric pressure and the desired temperature. Butanoate and butanoyl species are the stable surface intermediates formed during hydrogenation of ethyl butyrate. Hydrogenation of butanoate to a partially hydrogenated intermediate is likely involved in the rate-determining step of ethyl butyrate and butyric acid hydrogenation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
