title: Catalytic total hydrodeoxygenation of biomass-derived polyfunctionalized substrates to alkanes.
abstract: The total hydrodeoxygenation of carbohydrate-derived molecules to alkanes, a key reaction in the production of biofuel, was reviewed from the aspect of catalysis. Noble metals (or Ni) and acid are the main components of the catalysts, and group 6 or 7 metals such as Re are sometimes added as modifiers of the noble metal. The main reaction route is acid-catalyzed dehydration plus metal-catalyzed hydrogenation, and in some systems metal-catalyzed direct CO dissociation is involved. The appropriate active metal, acid strength, and reaction conditions depend strongly on the reactivity of the substrate. Reactions that use Pt or Pd catalysts supported on Nb-based acids or relatively weak acids are suitable for furanic substrates. Carbohydrates themselves and sugar alcohols undergo CC dissociation easily. The systems that use metal-catalyzed direct CO dissociations can give a higher yield of the corresponding alkane from carbohydrates and sugar alcohols.
authors.affiliation: Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan). yoshinao@erec.che.tohoku.ac.jp.
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Sibao
authors.initials: S
authors.lastname: Liu
authors.forename: Masazumi
authors.initials: M
authors.lastname: Tamura
authors.forename: Keiichi
authors.initials: K
authors.lastname: Tomishige
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D018533:Biomass; D002241:Carbohydrates / Q000737:chemistry; D002384:Catalysis; D008670:Metals / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*
chemical_list: D000473:Alkanes; D002241:Carbohydrates; D008670:Metals; D010100:Oxygen
keywords: alkanes; biomass; carbohydrates; hydrogenation; ketones