Palladium-bismuth intermetallic and surface-poisoned catalysts for the semi-hydrogenation of 2-methyl-3-butyn-2-ol

Cherkasov, Nikolay; Ibhadon, Alex O.; McCue, Alan J.; Anderson, James A.; Johnston, Shaun K.

Abstract

The effects of poisoning of Pd catalysts with Bi and annealing in a polyol (ethylene glycol) were studied on the semi-hydrogenation of 2-methyl-3-butyn-2-ol (MBY). An increase in the Pd:Bi ratio from 7 to 1 in the Bi-poisoned catalysts decreased the hydrogenation activity due to blocking of active sites, but increased maximum alkene yield from 91.5% for the Pd catalyst to 94–96% for all Bi-poisoned Pd catalysts, by decreasing the adsorption energy of alkene molecules and suppressing the formation of β-hydride phase. Annealing of the catalysts induced the formation of intermetallic phases and decreased its activity due to sintering of the catalytic particles and low activity of intermetallic compounds. Langmuir–Hinshelwood kinetic modelling of the experimental data showed that poisoning of Pd with Bi changed the relative adsorption constants of organic species suggesting ligand effects at high Bi content.

Citation

Cherkasov, N., Ibhadon, A. O., McCue, A. J., Anderson, J. A., & Johnston, S. K. (2015). Palladium-bismuth intermetallic and surface-poisoned catalysts for the semi-hydrogenation of 2-methyl-3-butyn-2-ol. Applied catalysis. A, General, 497, 22-30. https://doi.org/10.1016/j.apcata.2015.02.038

• Journal Article Type: Article
• Acceptance Date: Feb 20, 2015
• Online Publication Date: Feb 27, 2015
• Publication Date: 2015-05
• Deposit Date: Apr 6, 2016
• Publicly Available Date: Apr 6, 2016
• Journal: Applied catalysis a : general
• Print ISSN: 0926-860X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 497
• Pages: 22-30
• DOI: https://doi.org/10.1016/j.apcata.2015.02.038
• Keywords: Heterogeneous catalysis; Alkynol; 2-methyl-3-butyn-2-ol; Hydrogenation; Semi-hydrogenation; Palladium; Bismuth
• Public URL: https://hull-repository.worktribe.com/output/435076
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0926860X15001362
• Additional Information: This is an authors accepted manuscript of an article published in Applied catalysis a : general, 2015, v.497.