Fischer-Tropsch synthesis over lignin-derived cobalt-containing porous carbon fiber catalysts

Fischer-Tropsch synthesis over lignin-derived cobalt-containing porous carbon fiber catalysts

Valero Romero, M.J. (TU Delft ChemE/Catalysis Engineering; Universidad de Málaga)
García-Mateos, F. J. (Universidad de Málaga)
Kapteijn, F. (TU Delft ChemE/Catalysis Engineering)
Rodríguez-Mirasol, J. (Universidad de Málaga)
Cordero, T. (Universidad de Málaga)

2023

Cobalt-containing lignin-based fibers were synthesized in one step by electrospinning of Alcell lignin solutions as carbon precursor, a low-cost and renewable co-product of the paper making industry. The lignin fibers were thermostabilized in air to avoid the fusion during the carbonization process between 500 and 800 °C to obtain cobalt-containing porous carbon submicron fibers. These carbon fibers catalysts were studied for the Low-Temperature Fischer-Tropsch synthesis. The lignin-derived fibers containing Co catalyst located on the overall carbon fiber surface (internal and external) heat-treated at 500 °C (Co@CF-500) showed the best catalytic performance after 70 h on stream, with 75% and 60% selectivity to C5+ at 220 °C and H₂/CO ratios of 1 and 2, respectively, attributed to the high Co dispersion, optimal Co-particle size and better Co accessibility. Higher heat-treatment temperatures leaded to Co-containing carbon fibers with larger metallic cobalt nanoparticles encapsulated in graphitic-type carbon, which rendered them inaccessible for FTS.

Co-containing carbon fibers
Electrospinning
Fischer-Tropsch synthesis
Lignin

http://resolver.tudelft.nl/uuid:0a7ccdfb-c401-4849-8069-69ae7ef8c2a8

https://doi.org/10.1016/j.apcatb.2022.122078

0926-3373

Applied Catalysis B: Environmental, 321

Institutional Repository

journal article

© 2023 M.J. Valero Romero, F. J. García-Mateos, F. Kapteijn, J. Rodríguez-Mirasol, T. Cordero