Catalyst choice impacts aromatic monomer yields and selectivity in hydrogen-free reductive catalytic fractionation
Name
d2re00275b.pdf
Description
Published version
Size
1.05 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Kenny, Jacob K
Brandner, David G
Neefe, Sasha R
Michener, William E
Román-Leshkov, Yuriy
Beckham, Gregg T
Medlin, J Will
Date Issued
August 16, 2022
Journal
Reaction Chemistry & Engineering
Publisher
Royal Society of Chemistry (RSC)
Citation
Kenny, Jacob K, Brandner, David G, Neefe, Sasha R, Michener, William E, Román-Leshkov, Yuriy et al. 2022. "Catalyst choice impacts aromatic monomer yields and selectivity in hydrogen-free reductive catalytic fractionation." Reaction Chemistry & Engineering, 7 (12).
Version
Final published version
Abstract
Hydrogen-free reductive catalytic fractionation (RCF) is a promising method to extract and depolymerize lignin from native biomass without the use of external hydrogen gas. Here, we show that Pt/C and Pd/C achieve comparable monomer yields regardless of hydrogen pressure, whereas Ru/C and Ni/C show lower yields under H2-free conditions. Ru/C and Ni/C primarily perform hydrodeoxygenation regardless of the hydrogen pressure, but Pt/C and Pd/C demonstrated the ability to form both ethyl products from dehydrogenation and propanol products through hydrogenation depending on the presence of external H2. Adding water to the solvent increased HDO selectivity to propyl products for both Pt/C and Pd/C. Monomer yields from poplar RCF showed similar trends in yield and selectivity to reactions with the model compound coniferyl alcohol, suggesting that H2-free RCF performance is dictated by the stabilization rate of reactive monomer intermediates.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1039/d2re00275b
