Journal
CHEMSUSCHEM
Volume 15, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202200418
Keywords
amino acids; biomass; heterogeneous catalysis; oxidation; sustainable chemistry
Funding
- Federal Ministry of Food and Agriculture (BMEL) through the FNR (Fachagentur Nachwachsende Rohstoffe e. V.) [22010718]
- Projekt DEAL
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This study investigated the oxidation of unrefined HMF solutions obtained from saccharides in chicory roots, showing the critical role of base in increasing FDCA yield and the significant influence of amino acids from bio-sources on catalytic activity. A supported AuPd(2:1)/C alloy catalyst exhibited superior activity and stability.
The oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is highly attractive as FDCA is considered as substitute for the petrochemically derived terephthalic acid. There are only few reports on the direct use of unrefined HMF solutions from biomass resources and the influence of remaining constituents on the catalytic processes. In this work, the oxidation of HMF in a solution as obtained from hydrolysis and dehydration of saccharides in chicory roots was investigated without intermediate purification steps. The amount of base added to the solution was critical to increase the FDCA yield. Catalyst deactivation occurred and was attributed to poisoning by amino acids from the bio-source. A strong influence of amino acids on the catalytic activity was found for all supported Au, Pt, Pd, and Ru catalysts. A supported AuPd(2 : 1)/C alloy catalyst exhibited both superior catalytic activity and higher stability against deactivation by the critical amino acids.
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