文献类型：期刊文献

英文题名：An efficient NixZryO catalyst for hydrogenation of bio-derived methyl levulinate to γ-valerolactone in water under low hydrogen pressure

作者：Sun, Mengqing[1,2];Xia, Jie[2];Wang, Haifeng[2];Liu, Xiaohui[1,2];Xia, Qineng[1,2];Wang, Yanqin[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China

年份：2018

卷号：227

起止页码：488

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20181004883603);WOS:【SCI-EXPANDED(收录号:WOS:000428491000049)】；

基金：The research was sponsored financially by the National Natural Science Foundation of China (Nos. 21403065 and 91545103) and China Postdoctoral Science Foundation.

语种：英文

外文关键词：NixZryO; Methyl levulinate; gamma-Valerolactone; Catalytic hydrogenation; Aqueous solution

摘要：gamma-Valerolactone (GVL) has been identified as a key intermediate for the sustainable production of fuels and value-added chemicals. In this work, an efficient NixZryO catalyst was prepared by co-precipitation and used in the low pressure hydrogenation to prepare GVL from bio-derived methyl levulinate (ML) in aqueous solution. Several catalysts that differed in their Ni/Zr molar ratio were prepared and characterized by BET, XRD, H-2-TPR, NH3-TPD and XPS, and they exhibited different catalytic activities in the catalytic hydrogenation reaction of ML. The best catalytic activity was realized with NilZr10, which gave a 96.9% yield of GVL by low hydrogen pressure at 0.3 MPa in the aqueous solution at 150 degrees C. By comparison with NiO and Raney Ni, it was found that introducing zirconium into nickel oxide remarkably enhanced the performance of the NixZryO catalysts. According to the XRD, H-2-TPR and XPS results, when a certain amount of zirconium was introduced (e.g., Ni/Zr = 1), part of the nickel either coordinated with zirconium or formed NimZrnO quaSi solid solution and was not readily reduced by H-2. Theoretical calculations showed that the formed Ni - O - Zr species was superior to pure nickel or zirconium oxides for the adsorption of ML. The synergy between metallic nickel, which activated H-2, and the Ni - O - Zr species, which activated ML, was believed to expedite the production of gamma-valerolactone. Moreover, NilZr10 showed good catalytic stability and retained the catalytic performance even after five reaction cycles of the ML hydrogenation.