Supported Bimetallic Catalysts for the Solvent-Free Hydrogenation of Levulinic Acid to gamma-Valerolactone: Effect of Metal Combination (Ni-Cu, Ni-Co, Cu-Co)
- Title
- Supported Bimetallic Catalysts for the Solvent-Free Hydrogenation of Levulinic Acid to gamma-Valerolactone: Effect of Metal Combination (Ni-Cu, Ni-Co, Cu-Co)
- Author
- 서정길
- Keywords
- hydrogenation; alumina nanofiber; bimetallic catalysts; levulinic acid; γ-valerolactone
- Issue Date
- 2020-11
- Publisher
- MDPI
- Citation
- CATALYSTS, v. 10, no. 11, article no. 1354, page. 1354-1373
- Abstract
- gamma-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 gamma-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, H-2-TPR, XPS, NH3-TPD, and N-2 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, H-2 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.
- URI
- https://www.mdpi.com/2073-4344/10/11/1354https://repository.hanyang.ac.kr/handle/20.500.11754/172155
- ISSN
- 2073-4344
- DOI
- 10.3390/catal10111354
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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