title: One-Pot Process for Hydrodeoxygenation of Lignin to Alkanes Using Ru-Based Bimetallic and Bifunctional Catalysts Supported on Zeolite Y.
abstract: The synthesis of high-efficiency and low-cost catalysts for hydrodeoxygenation (HDO) of waste lignin to advanced biofuels is crucial for enhancing current biorefinery processes. Inexpensive transition metals, including Fe, Ni, Cu, and Zn, were severally co-loaded with Ru on HY zeolite to form bimetallic and bifunctional catalysts. These catalysts were subsequently tested for HDO conversion of softwood lignin and several lignin model compounds. Results indicated that the inexpensive earth-abundant metals could modulate the hydrogenolysis activity of Ru and decrease the yield of low-molecular-weight gaseous products. Among these catalysts, Ru-Cu/HY showed the best HDO performance, affording the highest selectivity to hydrocarbon products. The improved catalytic performance of Ru-Cu/HY was probably a result of the following three factors: (1) high total and strong acid sites, (2) good dispersion of metal species and limited segregation, and (3) high adsorption capacity for polar fractions, including hydroxyl groups and ether bonds. Moreover, all bifunctional catalysts proved to be superior over the combination catalysts of Ru/Al2O3and HY zeolite.
authors.affiliation: Department of Biological Systems Engineering, Washington State University, Richland, WA, 99354, USA.
authors.forename: Hongliang
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Biological Systems Engineering, Washington State University, Richland, WA, 99354, USA.
authors.forename: Hao
authors.initials: H
authors.lastname: Ruan
authors.affiliation: Chemistry & Chemical Engineering Division, Southwest Research Institute, San Antonio, TX, 78238, USA.
authors.forename: Maoqi
authors.initials: M
authors.lastname: Feng
authors.affiliation: Department of Biological Systems Engineering, Washington State University, Richland, WA, 99354, USA.
authors.forename: Yuling
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Pacific Northwest National Laboratory, 902 Battelle Blvd, Richland, WA, 99354, USA.
authors.forename: Heather
authors.initials: H
authors.lastname: Job
authors.affiliation: Environmental Molecular Sciences Laboratory, 3335 Q Ave, Richland, WA, 99354, USA.
authors.forename: Langli
authors.initials: L
authors.lastname: Luo
authors.affiliation: Environmental Molecular Sciences Laboratory, 3335 Q Ave, Richland, WA, 99354, USA.
authors.forename: Chongmin
authors.initials: C
authors.lastname: Wang
authors.affiliation: Environmental Molecular Sciences Laboratory, 3335 Q Ave, Richland, WA, 99354, USA.
authors.forename: Mark H
authors.initials: MH
authors.lastname: Engelhard
authors.affiliation: National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO., 80401, USA.
authors.forename: Erik
authors.initials: E
authors.lastname: Kuhn
authors.affiliation: National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO., 80401, USA.
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Chen
authors.affiliation: National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO., 80401, USA.
authors.forename: Melvin P
authors.initials: MP
authors.lastname: Tucker
authors.affiliation: Department of Biological Systems Engineering, Washington State University, Richland, WA, 99354, USA.
authors.forename: Bin
authors.identifier: 0000-0003-1686-8800
authors.initials: B
authors.lastname: Yang
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D002384:Catalysis; D008031:Lignin / Q000737:chemistry*; D017348:Microscopy, Electron, Scanning Transmission; D010100:Oxygen / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D000473:Alkanes; D017641:Zeolites; D012428:Ruthenium; D008031:Lignin; D010100:Oxygen
keywords: bifunctional catalysts; bimetallic catalysts; biofuel; hydrodeoxygenation; lignin