Gas phase hydrogenation of crotonaldehyde using formic acid as hydrogen source over Cu and Re supported on graphite
Rhenium and copper catalysts supported on high surface area graphite have been studied for the hydrogenation of crotonaldehyde using formic acid and pure hydrogen as hydrogen sources in the gas phase. The resulting catalysts were characterized using various techniques, such as Transmission Electron...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/425151 |
| Acceso en línea: | http://hdl.handle.net/10261/425151 https://www.scopus.com/inward/record.uri?eid=2-s2.0-105005854135&doi=10.1016%2Fj.apcatb.2025.125517&partnerID=40&md5=8090a91c73a3d0f519e8feb4ce08e1aa |
| Access Level: | acceso abierto |
| Palabra clave: | Copper Formic acid Gas phase H-Transfer Rhenium α β-unsaturated aldehyde |
| Sumario: | Rhenium and copper catalysts supported on high surface area graphite have been studied for the hydrogenation of crotonaldehyde using formic acid and pure hydrogen as hydrogen sources in the gas phase. The resulting catalysts were characterized using various techniques, such as Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD) and X-ray Photoelectron Spectrosocpy (XPS), Fluorescence TXRF and Temperature programmed surface reaction (TPSR). Catalytic reaction tests were carried out at the temperatures of 140 ℃ and 180 ℃ and ambient pressure, showing good conversion levels for all the catalysts and with remarkable variations in selectivity values. So, with the monometallic rhenium catalyst the desired selectivity to crotyl alcohol when using formic acid is achieved. However, it was unable to carry out such as hydrogenation with pure hydrogen. To better understand these modifications in selectivity depending on the different hydrogen sources, both theoretical and experimental studies of the different surfaces were performed using Density Functional Theory (DFT) and Temperature-Programmed Desorption (TPD). Theoretical studies reveal the different adsorption modes of crotonaldehyde, formic acid and hydrogen depending on the metallic surface centers. Finally, the high conversions obtained with these catalysts confirms the promising future of using alternative molecules, such as formic acid, instead of molecular hydrogen as hydrogenation reactant. © 2025 The Authors |
|---|