TY - JOUR
T1 - On the oxidative valorization of lignin to high-value chemicals
T2 - A critical review of opportunities and challenges
AU - Abdelaziz, Omar Y.
AU - Clemmensen, Ida
AU - Meier, Sebastian
AU - Costa, Carina A. E.
AU - Rodrigues, Alírio E.
AU - Hulteberg, Christian P.
AU - Riisager, Anders
PY - 2022
Y1 - 2022
N2 - The efficient valorization of lignin is crucial if we are to replace current petroleum-based feedstock and establish more sustainable and competitive lignocellulosic biorefineries. Pulp and paper mills and second-generation biorefineries produce large quantities of low-value technical lignin as a by-product, which is often combusted on-site for energy recovery. This review focuses on the conversion of technical lignins by oxidative depolymerization employing heterogeneous catalysts. It scrutinizes the current literature describing the use of various heterogeneous catalysts in the oxidative depolymerization of lignin, and includes a comparison of the methods, catalyst loadings, reaction media, and types of catalyst applied, as well as the reaction products and yields. Furthermore, current techniques for the determination of product yields and product recovery are discussed. Finally, challenges and suggestions for future approaches are outlined.
AB - The efficient valorization of lignin is crucial if we are to replace current petroleum-based feedstock and establish more sustainable and competitive lignocellulosic biorefineries. Pulp and paper mills and second-generation biorefineries produce large quantities of low-value technical lignin as a by-product, which is often combusted on-site for energy recovery. This review focuses on the conversion of technical lignins by oxidative depolymerization employing heterogeneous catalysts. It scrutinizes the current literature describing the use of various heterogeneous catalysts in the oxidative depolymerization of lignin, and includes a comparison of the methods, catalyst loadings, reaction media, and types of catalyst applied, as well as the reaction products and yields. Furthermore, current techniques for the determination of product yields and product recovery are discussed. Finally, challenges and suggestions for future approaches are outlined.
KW - Advanced analytics
KW - Aromatics recovery
KW - Biomass
KW - Heterogeneous catalysis
KW - Lignin valorization
KW - Oxidative depolymerization
U2 - 10.1002/cssc.202201232
DO - 10.1002/cssc.202201232
M3 - Review
C2 - 36004569
SN - 1864-5631
VL - 15
JO - ChemSusChem
JF - ChemSusChem
IS - 20
M1 - e202201232
ER -