Noble-Metal Catalyzed Hydrodeoxygenation of Biomass-Derived Lignin to Aromatic Hydrocarbons

Dhrubojyoti D. Laskar; Melvin P. Tucker; Xiaowen Chen; Gregory L. Helms; Bin Yang

doi:10.1039/C3GC42041H

Noble-Metal Catalyzed Hydrodeoxygenation of Biomass-Derived Lignin to Aromatic Hydrocarbons

Dhrubojyoti D. Laskar, Melvin P. Tucker, Xiaowen Chen, Gregory L. Helms, Bin Yang

Catalytic Carbon Transformation and Scale-Up Center

Research output: Contribution to journal › Article › peer-review

149 Scopus Citations

Abstract

Conversion of biomass derived lignin to liquid fuels has the promising potential to significantly improve carbon utilization and economic competitiveness of biomass refineries. In this study, an aqueous phase catalytic process was developed to selectively depolymerize the lignin polymeric framework and remove oxygen via hydrodeoxygenation (HDO) reactions. Efficient methods (ethanol and dilute alkali extraction) for selectively producing reactive lignin oligomers with high yields from corn stover were established. Characteristic structural features of the technical lignins employed for hydrocarbon production were elucidated with the aid of advanced analytical techniques, such as 2D HSQC NMR spectroscopy and gel permeation chromatography (GPC). Combinations of noble metal catalysts in the presence of various solid acid zeolites were tested for HDO activity of the oligomeric technical lignins predominantly containing 8-O-4′ inter-unit linkages. Results showed 35%-60% conversion of lignin with 65%-70% product selectivity for aromatic hydrocarbons (e.g. toluene) under various HDO conditions in the presence of noble metals (Ru, Rh and Pt) over Al₂O₃ (or C) supports and solid acid zeolites (e.g., NH₄⁺ Z-Y 57277-14-1) catalyst matrices.

Original language	American English
Pages (from-to)	897-910
Number of pages	14
Journal	Green Chemistry
Volume	16
Issue number	2
DOIs	https://doi.org/10.1039/C3GC42041H https://doi.org/10.1039/c3gc42041h
State	Published - Feb 2014

NREL Publication Number

NREL/JA-5100-61791

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title = "Noble-Metal Catalyzed Hydrodeoxygenation of Biomass-Derived Lignin to Aromatic Hydrocarbons",

abstract = "Conversion of biomass derived lignin to liquid fuels has the promising potential to significantly improve carbon utilization and economic competitiveness of biomass refineries. In this study, an aqueous phase catalytic process was developed to selectively depolymerize the lignin polymeric framework and remove oxygen via hydrodeoxygenation (HDO) reactions. Efficient methods (ethanol and dilute alkali extraction) for selectively producing reactive lignin oligomers with high yields from corn stover were established. Characteristic structural features of the technical lignins employed for hydrocarbon production were elucidated with the aid of advanced analytical techniques, such as 2D HSQC NMR spectroscopy and gel permeation chromatography (GPC). Combinations of noble metal catalysts in the presence of various solid acid zeolites were tested for HDO activity of the oligomeric technical lignins predominantly containing 8-O-4′ inter-unit linkages. Results showed 35%-60% conversion of lignin with 65%-70% product selectivity for aromatic hydrocarbons (e.g. toluene) under various HDO conditions in the presence of noble metals (Ru, Rh and Pt) over Al2O3 (or C) supports and solid acid zeolites (e.g., NH4+ Z-Y 57277-14-1) catalyst matrices.",

author = "Laskar, {Dhrubojyoti D.} and Tucker, {Melvin P.} and Xiaowen Chen and Helms, {Gregory L.} and Bin Yang",

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doi = "10.1039/C3GC42041H",

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AU - Laskar, Dhrubojyoti D.

AU - Tucker, Melvin P.

AU - Chen, Xiaowen

AU - Helms, Gregory L.

AU - Yang, Bin

PY - 2014/2

Y1 - 2014/2

N2 - Conversion of biomass derived lignin to liquid fuels has the promising potential to significantly improve carbon utilization and economic competitiveness of biomass refineries. In this study, an aqueous phase catalytic process was developed to selectively depolymerize the lignin polymeric framework and remove oxygen via hydrodeoxygenation (HDO) reactions. Efficient methods (ethanol and dilute alkali extraction) for selectively producing reactive lignin oligomers with high yields from corn stover were established. Characteristic structural features of the technical lignins employed for hydrocarbon production were elucidated with the aid of advanced analytical techniques, such as 2D HSQC NMR spectroscopy and gel permeation chromatography (GPC). Combinations of noble metal catalysts in the presence of various solid acid zeolites were tested for HDO activity of the oligomeric technical lignins predominantly containing 8-O-4′ inter-unit linkages. Results showed 35%-60% conversion of lignin with 65%-70% product selectivity for aromatic hydrocarbons (e.g. toluene) under various HDO conditions in the presence of noble metals (Ru, Rh and Pt) over Al2O3 (or C) supports and solid acid zeolites (e.g., NH4+ Z-Y 57277-14-1) catalyst matrices.

AB - Conversion of biomass derived lignin to liquid fuels has the promising potential to significantly improve carbon utilization and economic competitiveness of biomass refineries. In this study, an aqueous phase catalytic process was developed to selectively depolymerize the lignin polymeric framework and remove oxygen via hydrodeoxygenation (HDO) reactions. Efficient methods (ethanol and dilute alkali extraction) for selectively producing reactive lignin oligomers with high yields from corn stover were established. Characteristic structural features of the technical lignins employed for hydrocarbon production were elucidated with the aid of advanced analytical techniques, such as 2D HSQC NMR spectroscopy and gel permeation chromatography (GPC). Combinations of noble metal catalysts in the presence of various solid acid zeolites were tested for HDO activity of the oligomeric technical lignins predominantly containing 8-O-4′ inter-unit linkages. Results showed 35%-60% conversion of lignin with 65%-70% product selectivity for aromatic hydrocarbons (e.g. toluene) under various HDO conditions in the presence of noble metals (Ru, Rh and Pt) over Al2O3 (or C) supports and solid acid zeolites (e.g., NH4+ Z-Y 57277-14-1) catalyst matrices.

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Noble-Metal Catalyzed Hydrodeoxygenation of Biomass-Derived Lignin to Aromatic Hydrocarbons

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