Promoting effects of bismuth in carbon-supported bimetallic Pd-Bi catalysts for the selective oxidation of glucose to gluconic acid
(1997) 3rd World Congress on Oxidation Catalysis — Location: SAN DIEGO(California) (21.September.1997)
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- Authors
Devillers, Michel 
- Abstract
- Experiments are carried out to improve the understanding of the behaviour of Bi-promoted Pd/C catalysts during their use in the selective oxidation of glucose to gluconic acid by O-2. Supported Bi(5 wt.%)-Pd(5 wt.%)/C catalysts are prepared by deposition from a suspension of several carboxylate precursors in heptane, followed by thermal degradation under N-2 at 773 K. The catalysts are characterized by XRD, XPS and SEM-EDX. Because significant amounts of bismuth are leached from the catalysts under the reaction conditions, recycling experiments are performed to evaluate the influence of this process on the catalyst lifetime. Whereas the Bi losses are essentially restricted to the first few catalytic runs, the gluconic acid yield, normalized with respect to the catalyst mass, remains constant. Catalytic tests are also conducted in the presence of diethylenetriaminepentaacetate, which is a stronger chelating agent than the gluconate ions, to remove the major part of dissolved Bi from the solution. The behaviour of the bimetallic catalyst is also compared with that of a commercial trimetallic Pd(5 wt.%)-Pt(1 wt.%)-Bi(5 wt.%)/C catalyst.
- Affiliations
Citations
Wenkin, M., Renard, C., Ruiz, P., Delmon, B., & Devillers, M. (1997). Promoting effects of bismuth in carbon-supported bimetallic Pd-Bi catalysts for the selective oxidation of glucose to gluconic acid. Studies in Surface Science and Catalysis, 110, 517-526. https://hdl.handle.net/2078.5/143523 (Original work published 1997)