Selective production of arenes via direct lignin upgrading over a niobium-based catalyst

Shao, Yi; Xia, Qineng; Dong, Lin; Liu, Xiaohui; Han, Xue; Parker, Stewart F.; Cheng, Yongqiang; Daemen, Luke L.; Ramirez-Cuesta, Anibal J.; Yang, Sihai; Wang, Yanqin

doi:10.1038/ncomms16104

Selective production of arenes via direct lignin upgrading over a niobium-based catalyst

Journal Article · Mon Jul 24 00:00:00 UTC 2017 · Nature Communications

DOI:https://doi.org/10.1038/ncomms16104· OSTI ID:1422566

Shao, Yi ^[1]; Xia, Qineng ^[1]; Dong, Lin ^[1]; Liu, Xiaohui ^[1]; Han, Xue ^[2]; ^[3]; ^[4]; Daemen, Luke L. ^[4]; ^[4]; Yang, Sihai ^[2]; ^[1]

East China University of Science and Technology, Shanghai (China). Shanghai Key Laboratory of Functional Materials Chemistry, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering
Univ. of Manchester (United Kingdom). School of Chemistry
Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab., ISIS Facility
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). The Chemical and Engineering Materials Division (CEMD), Neutron Sciences Directorate

Lignin is the only large-volume renewable source of aromatic chemicals. Efficient depolymerization and deoxygenation of lignin while retaining the aromatic functionality are attractive but extremely challenging. Here we report the selective production of arenes via direct hydrodeoxygenation of organosolv lignin over a porous Ru/Nb₂O₅ catalyst that enabled the complete removal of the oxygen content from lignin. The conversion of birch lignin to monomer C7–C9 hydrocarbons is nearly quantitative based on its monomer content, with a total mass yield of 35.5 wt% and an exceptional arene selectivity of 71 wt%. Inelastic neutron scattering and DFT calculations confirm that the Nb₂O₅ support is catalytically unique compared with other traditional oxide supports, and the disassociation energy of Caromatic–OH bonds in phenolics is significantly reduced upon adsorption on Nb₂O₅, resulting in its distinct selectivity to arenes. This one-pot process provides a promising approach for improved lignin valorization with general applicability.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1422566

Journal Information:: Nature Communications, Journal Name: Nature Communications Vol. 8; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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