Abstract
A series of ruthenium-based catalysts supported on a set of silicate and aluminosilicate mesoporous molecular sieves was synthesized and tested in xylose hydrogenation. The materials were characterized in terms of morphology, textural properties, acidity, as well as ruthenium loading, dispersion, and oxidation state. In general, the aluminosilicates-based catalysts displayed a higher activity compared to their respective silicate supports, which can be ascribed to a higher Ru content and dispersion, enhanced by a higher acidity. The most active synthesized catalyst (Ru/Al-MCM-4) displayed an improved performance compared to a commercial Ru/C catalyst due to a better xylitol selectivity. Two modelling approaches were implemented to describe the kinetic rate. The first model was based on the hypothesis that xylose molecules and hydrogen are adsorbed in different active sites on the catalyst surface, while the second model supposes the formation of an intermediate on the catalyst surface that reacts to form xylitol. Both models gave a very good description of the experimental data.
| Original language | English |
|---|---|
| Article number | 150019 |
| Number of pages | 15 |
| Journal | Chemical Engineering Journal |
| Volume | 485 |
| DOIs | |
| Publication status | Published - 1 Apr 2024 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work is part of the activities financed by the Academy of Finland through the Academy Professor grants 319002 , 320115 , 345053 (Tapio Salmi). Economic support from Åbo Akademi University Graduate School (German Araujo Barahona) is gratefully acknowledged. Nataliya Shcherban acknowledges U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Catalysis Science, under Award Number DE-SC0021041 for supporting X-ray diffraction and pyridine adsorption with FTIR-spectral analysis, and the National Research Foundation of Ukraine which funded the materials synthesis through the project “New effective zeolite catalysts for environmentally friendly processes of the conversion of renewable raw materials into valuable organic compounds” (project number 2020. 02/0335 ). Juan García Serna wish to thank Agencia Estatal de Investigación , Unión Europea-Next Generation UE, Plan de Recuperación, Transformación y Resiliencia, Ministerio de Ciencia e Innovación (MICINN) and Universidad de Valladolid for funding in projects TED2021-129837B-C42 and PID2019-105975 GB-I00 and FEDER Funds and Junta de Castilla y León (Consejería de Educación) project CLU-2019-04 . Authors are grateful to the Materials Research Infrastructure/ Department of Physics and Astronomy, University of Turku (XPS spectrometer) and to the Electron Microscopy Laboratory, Institute of Biomedicine, University of Turku , and Biocenter Finland . This work is part of the activities financed by the Academy of Finland through the Academy Professor grants 319002, 320115, 345053 (Tapio Salmi). Economic support from Åbo Akademi University Graduate School (German Araujo Barahona) is gratefully acknowledged. Nataliya Shcherban acknowledges U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Catalysis Science, under Award Number DE-SC0021041 for supporting X-ray diffraction and pyridine adsorption with FTIR-spectral analysis, and the National Research Foundation of Ukraine which funded the materials synthesis through the project “New effective zeolite catalysts for environmentally friendly processes of the conversion of renewable raw materials into valuable organic compounds” (project number 2020.02/0335). Juan García Serna wish to thank Agencia Estatal de Investigación, Unión Europea-Next Generation UE, Plan de Recuperación, Transformación y Resiliencia, Ministerio de Ciencia e Innovación (MICINN) and Universidad de Valladolid for funding in projects TED2021-129837B-C42 and PID2019-105975 GB-I00 and FEDER Funds and Junta de Castilla y León (Consejería de Educación) project CLU-2019-04. Authors are grateful to the Materials Research Infrastructure/Department of Physics and Astronomy, University of Turku (XPS spectrometer) and to the Electron Microscopy Laboratory, Institute of Biomedicine, University of Turku, and Biocenter Finland.