期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 310, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121340
关键词
-Valerolactone; Sol-gel synthesis; Bifunctional catalyst; Kinetics; Morphological characterization
资金
- Benedetta De Liso (Universita di Napoli Federico II)
The transformation of GVL into LA requires the use of bifunctional catalysts synthesized by solgel route. The interaction between the metals and their relative amount and dispersion play a crucial role in determining the catalytic activity.
The transformation of gamma-valerolactone (GVL) into levulinic acid (LA) requires the use of bifunctional catalysts allowing the hydrogenation and lactonization steps to occur. The aim of this study is to clarify the role played by both redox (Ru) and acid (Nb) sites of the ruthenium-niobium-silicon mixed oxides catalysts, synthesized by solgel route, when this reaction is performed in mild conditions. The catalytic performances of the materials are related to an in-depth morphologic and structural characterization, demonstrating that the interaction between the two metals and their relative amount and dispersion are crucial in determining their activity. The results confirm the hydrogenation-dehydration consecutive reaction network and evidence the possibility to selectively produce either GVL or the intermediate gamma-hydroxypentanoic acid by an accurate choice of the catalyst composition.
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