title: Noble metal catalyzed aqueous phase hydrogenation and hydrodeoxygenation of lignin-derived pyrolysis oil and related model compounds.
abstract: Aqueous phase hydrodeoxygenation of lignin pyrolysis oil and related model compounds were investigated using four noble metals supported on activated carbon. The hydrodeoxygenation of guaiacol has three major reaction pathways and the demethylation reaction, mainly catalyzed by Pd, Pt and Rh, produces catechol as the products. The presence of catechol and guaiacol in the reaction is responsible for the coke formation and the catalysts deactivation. As expected, there was a significant decrease in the specific surface area of Pd, Pt and Rh catalysts during the catalytic reaction because of the coke deposition. In contrast, no catechol was produced from guaiacol when Ru was used so a completely hydrogenation was accomplished. The lignin pyrolysis oil upgrading with Pt and Ru catalysts further validated the reaction mechanism deduced from model compounds. Fully hydrogenated bio-oil was produced with Ru catalyst.
authors.affiliation: School of Chemical and Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Wei
authors.initials: W
authors.lastname: Mu
authors.affiliation: Department of Chemistry and Biochemistry, Institute of Paper Science and Technology, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Haoxi
authors.initials: H
authors.lastname: Ben
authors.affiliation: School of Chemical and Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Xiaotang
authors.initials: X
authors.lastname: Du
authors.affiliation: School of Material Science and Engineering, Institute of Paper Science and Technology, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Xiaodan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and Biochemistry, Institute of Paper Science and Technology, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Fan
authors.initials: F
authors.lastname: Hu
authors.affiliation: School of Chemical and Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, GA 30318, United States.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of Chemical and Biomolecular Engineering, Center for Renewable Carbon, University of Tennessee, Knoxville, TN 37996, United States.
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Ragauskas
authors.affiliation: School of Chemical and Biomolecular Engineering, Renewable Bioproducts Institute, Georgia Institute of Technology, Atlanta, GA 30318, United States. Electronic address: yulin.deng@chbe.gatech.edu.
authors.forename: Yulin
authors.initials: Y
authors.lastname: Deng
mesh_terms: D056804:Biofuels; D002384:Catalysis; D002606:Charcoal / Q000737:chemistry*; D006358:Hot Temperature; D006859:Hydrogen / Q000737:chemistry*; D006865:Hydrogenation; D008031:Lignin / Q000737:chemistry*; D008422:Materials Testing; D008670:Metals / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D044367:Phase Transition; D010938:Plant Oils / Q000138:chemical synthesis*
chemical_list: D056804:Biofuels; D008670:Metals; D010938:Plant Oils; D002606:Charcoal; D006859:Hydrogen; D008031:Lignin; D010100:Oxygen
keywords: Aqueous phase; Hydrodeoxygenation; Lignin; Noble metal catalyst; Pyrolysis oil