RT Journal Article
T1 Biobased Vanillin Production by Oxidative Depolymerization of Kraft Lignin on a Nitrogen- and Phosphorus-Functionalized Activated Carbon Catalyst
A1 García-Rollán, Miguel
A1 Rivas-Márquez, María Nerea
A1 Bertran-Llorens, Salvador
A1 Deuss, Peter J.
A1 Ruiz-Rosas, Ramiro Rafael
A1 Rosas-Martínez, Juana María
A1 Rodríguez-Mirasol, José
A1 Cordero-Alcántara, Tomás
K1 Biopolímeros
K1 Catalizadores
K1 Polímeros - Degradación
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.
PB ACS
YR 2024
FD 2024-04-04
LK https://hdl.handle.net/10630/31084
UL https://hdl.handle.net/10630/31084
LA eng
NO Energy Fuels 2024, 38, 8, 7018–7032 Publication Date:April 4, 2024
NO The authors wish to thank MICINN (RTI2018-097555-B-100) and Junta de Andalucía (UMA18-FEDERJA-110 andP18-RT-4592) for financial support. Funding for open accesscharge: Universidad de Málaga/CBUA. M.G.-R. acknowledgesthe assistance of MICINN through an FPU Grant (FPU 18/01402)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 25 ene 2026