Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts
Monometallic (Cu, Ni) and bimetallic (Cu-Ni) catalysts supported on KIT-6 based mesoporous silica/zeolite composites were prepared using the wet impregnation method. The catalysts were characterized using X-ray powder diffraction, N<sub>2</sub> physisorption, SEM, solid state NMR and H&l...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/17/5383 |
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| author | Margarita Popova Ivalina Trendafilova Manuela Oykova Yavor Mitrev Pavleta Shestakova Magdolna R. Mihályi Ágnes Szegedi |
| author_facet | Margarita Popova Ivalina Trendafilova Manuela Oykova Yavor Mitrev Pavleta Shestakova Magdolna R. Mihályi Ágnes Szegedi |
| author_sort | Margarita Popova |
| collection | DOAJ |
| description | Monometallic (Cu, Ni) and bimetallic (Cu-Ni) catalysts supported on KIT-6 based mesoporous silica/zeolite composites were prepared using the wet impregnation method. The catalysts were characterized using X-ray powder diffraction, N<sub>2</sub> physisorption, SEM, solid state NMR and H<sub>2</sub>-TPR methods. Finely dispersed NiO and CuO were detected after the decomposition of impregnating salt on the silica carrier. The formation of small fractions of ionic Ni<sup>2+</sup> and/or Cu<sup>2+</sup> species, interacting strongly with the silica supports, was found. The catalysts were studied in the gas-phase upgrading of lignocellulosic biomass-derived levulinic acid (LA) to γ-valerolactone (GVL). The bimetallic, CuNi-KIT-6 catalyst showed 100% LA conversion at 250 °C and atmospheric pressure. The high LA conversion and GVL yield can be attributed to the high specific surface area and finely dispersed Cu-Ni species in the catalyst. Furthermore, the catalyst also exhibited high stability after 24 h of reaction time with a GVL yield above 80% without any significant change in metal dispersion. |
| first_indexed | 2024-03-10T01:31:21Z |
| format | Article |
| id | doaj.art-1c4bb03043514175a51a5dfbcf97c088 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-10T01:31:21Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-1c4bb03043514175a51a5dfbcf97c0882023-11-23T13:41:02ZengMDPI AGMolecules1420-30492022-08-012717538310.3390/molecules27175383Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite CatalystsMargarita Popova0Ivalina Trendafilova1Manuela Oykova2Yavor Mitrev3Pavleta Shestakova4Magdolna R. Mihályi5Ágnes Szegedi6Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaResearch Centre for Natural Sciences, Magyar Tudósok Körútja 2., 1117 Budapest, HungaryResearch Centre for Natural Sciences, Magyar Tudósok Körútja 2., 1117 Budapest, HungaryMonometallic (Cu, Ni) and bimetallic (Cu-Ni) catalysts supported on KIT-6 based mesoporous silica/zeolite composites were prepared using the wet impregnation method. The catalysts were characterized using X-ray powder diffraction, N<sub>2</sub> physisorption, SEM, solid state NMR and H<sub>2</sub>-TPR methods. Finely dispersed NiO and CuO were detected after the decomposition of impregnating salt on the silica carrier. The formation of small fractions of ionic Ni<sup>2+</sup> and/or Cu<sup>2+</sup> species, interacting strongly with the silica supports, was found. The catalysts were studied in the gas-phase upgrading of lignocellulosic biomass-derived levulinic acid (LA) to γ-valerolactone (GVL). The bimetallic, CuNi-KIT-6 catalyst showed 100% LA conversion at 250 °C and atmospheric pressure. The high LA conversion and GVL yield can be attributed to the high specific surface area and finely dispersed Cu-Ni species in the catalyst. Furthermore, the catalyst also exhibited high stability after 24 h of reaction time with a GVL yield above 80% without any significant change in metal dispersion.https://www.mdpi.com/1420-3049/27/17/5383lignocellulosic biomasslevulinic acidmesoporous silica compositesγ-valerolactonegas-phase hydrogenationsolid state NMR |
| spellingShingle | Margarita Popova Ivalina Trendafilova Manuela Oykova Yavor Mitrev Pavleta Shestakova Magdolna R. Mihályi Ágnes Szegedi Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts Molecules lignocellulosic biomass levulinic acid mesoporous silica composites γ-valerolactone gas-phase hydrogenation solid state NMR |
| title | Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts |
| title_full | Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts |
| title_fullStr | Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts |
| title_full_unstemmed | Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts |
| title_short | Hydrodeoxygenation of Levulinic Acid to γ-Valerolactone over Mesoporous Silica-Supported Cu-Ni Composite Catalysts |
| title_sort | hydrodeoxygenation of levulinic acid to γ valerolactone over mesoporous silica supported cu ni composite catalysts |
| topic | lignocellulosic biomass levulinic acid mesoporous silica composites γ-valerolactone gas-phase hydrogenation solid state NMR |
| url | https://www.mdpi.com/1420-3049/27/17/5383 |
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