TY - JOUR
T1 - Biobased Vanillin Production by Oxidative Depolymerization of Kraft Lignin on a Nitrogen- and Phosphorus-Functionalized Activated Carbon Catalyst
AU - García-Rollán, Miguel
AU - Rivas-Márquez, Maria N.
AU - Bertran-Llorens, Salvador
AU - Deuss, Peter J.
AU - Ruiz-Rosas, Ramiro
AU - Rosas, Juana M.
AU - Rodríguez-Mirasol, José
AU - Cordero, Tomás
N1 - Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society
PY - 2024/4/18
Y1 - 2024/4/18
N2 - The sustainable production of vanillin from the oxidative depolymerization of lignin was evaluated. Vanillin was produced from Kraft lignin using heterogeneous catalysts based on activated carbons prepared by chemical activation of sodium lignosulfonate with H3PO4. The novel redox catalytic system, obtained by HNO3 treatment, allows the heterogenization of nitrobenzene structures on the activated carbon, reaching vanillin yield 30% higher than that obtained without a heterogeneous catalyst (about 3.1 wt %). A copper catalyst (5 wt %) was also prepared for comparison purposes. The highest vanillin yield was obtained at 200 °C and 10 bar for the nitrobenzene-like catalyst, reaching full extraction from the selected technical lignin. The catalyst was successfully reused without any regeneration treatment, evidencing no signs of deactivation. The possibility of transferring oxygen from oxidized P groups to reduced N groups in a redox cycle seems to be responsible for this sustained catalytic activity. To promote zero waste production, the obtained residual lignin was also used to prepare an activated carbon with outstanding properties, ABET ∼ 1000 m2/g.
AB - The sustainable production of vanillin from the oxidative depolymerization of lignin was evaluated. Vanillin was produced from Kraft lignin using heterogeneous catalysts based on activated carbons prepared by chemical activation of sodium lignosulfonate with H3PO4. The novel redox catalytic system, obtained by HNO3 treatment, allows the heterogenization of nitrobenzene structures on the activated carbon, reaching vanillin yield 30% higher than that obtained without a heterogeneous catalyst (about 3.1 wt %). A copper catalyst (5 wt %) was also prepared for comparison purposes. The highest vanillin yield was obtained at 200 °C and 10 bar for the nitrobenzene-like catalyst, reaching full extraction from the selected technical lignin. The catalyst was successfully reused without any regeneration treatment, evidencing no signs of deactivation. The possibility of transferring oxygen from oxidized P groups to reduced N groups in a redox cycle seems to be responsible for this sustained catalytic activity. To promote zero waste production, the obtained residual lignin was also used to prepare an activated carbon with outstanding properties, ABET ∼ 1000 m2/g.
UR - http://www.scopus.com/inward/record.url?scp=85189535800&partnerID=8YFLogxK
U2 - 10.1021/acs.energyfuels.4c00108
DO - 10.1021/acs.energyfuels.4c00108
M3 - Article
AN - SCOPUS:85189535800
SN - 0887-0624
VL - 38
SP - 7018
EP - 7032
JO - Energy and Fuels
JF - Energy and Fuels
IS - 8
ER -