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- [2020] [서정길] Supported Bimetallic Catalysts for the Solvent-free Hydrogenolysis of Levulinic Acid to gamma-Valerolactone
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- 2021.09.27
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- 에어로겔소재연구센터 관리자
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Supported Bimetallic Catalysts for the Solvent-free Hydrogenolysis of Levulinic Acid to gamma-Valerolactone: Effect of Metal Combination (Ni-Cu, Ni-Co, Cu-Co)
Abstract
γ-valerolactone (GVL) is an important value-added chemical with potential applications as a fuel additive, a precursor for valuable chemicals, and polymer synthesis. Herein, different monometallic and bimetallic catalysts supported on γ-Al2O3 nanofibers (Ni, Cu, Co, Ni-Cu, Ni-Co, Cu-Co) were prepared by the incipient wetness impregnation method and employed in the solvent-free hydrogenation of levulinic acid (LA) to GVL. The influence of metal loading, metal combination, and ratio on the activity and selectivity of the catalysts was investigated. XRD, SEM-EDS, TEM, H2-TPR, XPS, NH3-TPD, and N2 adsorption were used to examine the structure and properties of the catalysts. In this study, GVL synthesis involves the single-step dehydration of LA to an intermediate, followed by hydrogenation of the intermediate to GVL. Ni-based catalysts were found to be highly active for the reaction. [2:1] Ni-Cu/Al2O3 catalyst showed 100.0% conversion of LA with >99.0% selectivity to GVL, whereas [2:1] Ni-Co/Al2O3 yielded 100.0% conversion of LA with 83.0% selectivity to GVL. Moreover, reaction parameters such as temperature, H2 pressure, time, and catalyst loading were optimized to obtain the maximum GVL yield. The solvent-free hydrogenation process described in this study propels the future industrial production of GVL from LA.논문정보
Catalysts 2020, 10(11), 1354;
Received: 26 October 2020 / Revised: 16 November 2020 / Accepted: 19 November 2020 / Published: 21 November 2020
Authors: Mahlet N. Gebresillase, Reibelle Q. Raguindin, Hern Kim, Jeong Gil Seo