title: Catalytic Transfer Hydrogenation of Furfural to 2-Methylfuran and 2-Methyltetrahydrofuran over Bimetallic Copper-Palladium Catalysts.
abstract: The catalytic transfer hydrogenation of furfural to the fuel additives 2-methylfuran (2-MF) and 2-methyltetrahydrofuran (2-MTHF) was investigated over various bimetallic catalysts in the presence of the hydrogen donor 2-propanol. Of all the as-prepared catalysts, bimetallic Cu-Pd catalysts showed the highest catalytic activities towards the formation of 2-MF and 2-MTHF with a total yield of up to 83.9 % yield at 220 °C in 4 h. By modifying the Pd ratios in the Cu-Pd catalyst, 2-MF or 2-MTHF could be obtained selectively as the prevailing product. The other reaction conditions also had a great influence on the product distribution. Mechanistic studies by reaction monitoring and intermediate conversion revealed that the reaction proceeded mainly through the hydrogenation of furfural to furfuryl alcohol, which was followed by deoxygenation to 2-MF in parallel to deoxygenation/ring hydrogenation to 2-MTHF. Finally, the catalyst showed a high reactivity and stability in five catalyst recycling runs, which represents a significant step forward toward the catalytic transfer hydrogenation of furfural.
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Chang
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: An-Feng
authors.initials: AF
authors.lastname: Liu
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Cai
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: Jin-Yue
authors.initials: JY
authors.lastname: Luo
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Pan
authors.affiliation: Department of Chemical Engineering, Nanjing Forestry University, Longpan Road, Nanjing, China.
authors.forename: Yao-Bing
authors.initials: YB
authors.lastname: Huang
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry; D005662:Furaldehyde / Q000737:chemistry*; D005663:Furans / Q000138:chemical synthesis*; D006865:Hydrogenation; D010165:Palladium / Q000737:chemistry; D059027:Recycling
chemical_list: D005663:Furans; C029060:2-methylfuran; D010165:Palladium; D003300:Copper; D005662:Furaldehyde; C550584:2-methyltetrahydrofuran
keywords: alloys; biomass; copper; palladium; supported catalysts