Conversion of succinic acid over Ni and Co catalysts
| Autor: | Ana Belén Dongil, Roberto I. Canales, Néstor Escalona, Mabel Rojas, Ximena Zarate, Mario Saavedra-Torres, Cesar Pazo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Chemistry
02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Product distribution 0104 chemical sciences Metal chemistry.chemical_compound Adsorption X-ray photoelectron spectroscopy Succinic acid Desorption visual_art visual_art.visual_art_medium 0210 nano-technology Incipient wetness impregnation Nuclear chemistry |
| Zdroj: | Catalysis Today. 367:165-176 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2020.04.067 |
| Popis: | Liquid-phase hydrogenation of succinic acid (SA) over supported Ni and Co catalysts was investigated at 200 °C and 6 MPa of H2. Reduced and passivated catalysts with the same surface metal density (2.5 atoms of metal per nm2 of support) were prepared by incipient wetness impregnation. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption, X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), CO-chemisorption, and temperature-programmed desorption of NH3 (TPD-NH3). The Ni and Co catalysts supported over SiO2 showed different product distribution, due to the adsorption of the SA over the surface of catalysts, determined by DFT calculations. The Co/SiO2, Co/SiO2-Al2O3, and Co/Al2O3 catalysts showed different product distribution, which was correlated with total acidity from TPD-NH3 results. In general, the Co catalysts promoted the hydrogenation process; however, the highest total acidity showed by Co/Al2O3 also promoted the dehydration process. Finally, the initial rate follows the trend according to the dispersion determined by CO-chemisorption. |
| Databáze: | OpenAIRE |
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