title: In Situ Catalytic Hydrogenation of Biomass-Derived Methyl Levulinate to γ-Valerolactone in Methanol.
abstract: In this work, the hydrocyclization of methyl levulinate (ML) to γ-valerolactone (GVL) was performed in MeOH over an in situ prepared nanocopper catalyst without external H2 . This nanocopper catalyst served as a dual-functional catalyst for both hydrogen production by MeOH reforming and hydrogenation of ML. Nearly quantitative ML conversion with a GVL selectivity of 87.6 % was achieved at 240 °C in 1 h in MeOH under a nitrogen atmosphere. ML in the methanolysis products of cellulose also could be hydrogenated effectively to GVL over this nanocopper catalyst even in the presence of humins to give an ML conversion of 94.1 % and a GVL selectivity of 73.2 % at 240 °C in 4 h. The absorption behavior of humins on the surface of the nanocopper catalyst was observed, which resulted in a pronounced increase in the acidic sites of the nanocopper catalyst that facilitate ring-opening and the hydrocarboxylation/alkoxycarbonylation of GVL to byproducts.
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China).
authors: Xing
authors: X
authors: Tang
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China).
authors: Zheng
authors: Z
authors: Li
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China).
authors: Xianhai
authors: X
authors: Zeng
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China).
authors: Yetao
authors: Y
authors: Jiang
authors: SUNY-College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210 (USA).
authors: Shijie
authors: S
authors: Liu
authors: Henan Key Lab of Biomass Energy, Huayuan Road 29, Zhengzhou, Henan 450008 (PR China).
authors: Tingzhou
authors: T
authors: Lei
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China). sunyong@xmu.edu.cn.|Key Laboratory of Biomass Energy and Materials of Jiangsu Province, Nanjing 210042 (PR China). sunyong@xmu.edu.cn.|Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, South East University, Nanjing 210018 (PR China). sunyong@xmu.edu.cn.
authors: Yong
authors: Y
authors: Sun
authors: College of Energy, Xiamen University, Xiangan South Road, Xiamen, Fujian 361102 (PR China). lulin@xmu.edu.cn.
authors: Lu
authors: L
authors: Lin
mesh_terms: D002384:Catalysis; D006859:Hydrogen / Q000737:chemistry; D006865:Hydrogenation; D007783:Lactones / Q000737:chemistry*; D007982:Levulinic Acids / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry*
chemical_list: D007783:Lactones; D007982:Levulinic Acids; C119867:methyl levulinate; D006859:Hydrogen; C037556:gamma-valerolactone; D000432:Methanol
keywords: biomass; copper; cyclization; heterogeneous catalysis; multicomponent reactions