title: Effective Release of Lignin Fragments from Lignocellulose by Lewis Acid Metal Triflates in the Lignin-First Approach.
abstract: Adding value to lignin, the most complex and recalcitrant fraction in lignocellulosic biomass, is highly relevant to costefficient operation of biorefineries. We report the use of homogeneous metal triflates to rapidly release lignin from biomass. Combined with metal-catalyzed hydrogenolysis, the process separates woody biomass into few lignin-derived alkylmethoxyphenols and cellulose under mild conditions. Model compound studies show the unique catalytic properties of metal triflates in cleaving lignin-carbohydrate interlinkages. The lignin fragments can then be disassembled by hydrogenolysis. The tandem process is flexible and allows obtaining good aromatic monomer yields from different woods (36-48 wt %, lignin base). The cellulose-rich residue is an ideal feedstock for established biorefining processes. The highly productive strategy is characterized by short reaction times, low metal triflate catalyst requirement, and leaving cellulose largely untouched.
authors: Schuit Institute of Catalysis, Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors: Xiaoming
authors: X
authors: Huang
authors: Schuit Institute of Catalysis, Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors: Jiadong
authors: J
authors: Zhu
authors: Schuit Institute of Catalysis, Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors: Tamás I
authors: TI
authors: Korányi
authors: Combustion Technology, Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors: Michael D
authors: MD
authors: Boot
authors: Schuit Institute of Catalysis, Inorganic Materials Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors: Emiel J M
authors: EJ
authors: Hensen
mesh_terms: D018533:Biomass; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry; D058116:Lewis Acids; D008031:Lignin / Q000737:chemistry / Q000302:isolation & purification*; D008698:Mesylates; D008670:Metals; D014934:Wood / Q000737:chemistry
chemical_list: D058116:Lewis Acids; D008698:Mesylates; D008670:Metals; C036909:lignocellulose; D002482:Cellulose; D008031:Lignin; C012077:trifluoromethanesulfonic acid
keywords: biomass; catalysis; extraction; lignin; metal triflate