RT info:eu-repo/semantics/article
T1 Hydrothermal reduction of CO2 captured as NaHCO3 into formate with metal reductants and catalysts
A1 Quintana Gómez, Laura
A1 Martínez Álvarez, Pablo
A1 Segovia Puras, José Juan
A1 Martín Martínez, Ángel
A1 Bermejo Roda, Maria Dolores
K1 Hydrothermal CO2 reduction
K1 Reducción de CO2 hidrotermal
K1 Kinetic model
K1 Modelo cinético
AB The hydrothermal reduction of CO2 captured in aqueous solutions using metal reductants is a promising novel approach that achieves high yields of conversion and high selectivity, but it presents the limitation of the high temperatures needed for the reaction to take place. In this work, experiments combining several reductant metals (Zn, Al and Fe), catalysts (Pd/C, Ni, Cu, Fe2O3 and Fe3O4) and temperatures (200, 250 and 300 ºC) were performed to optimize the process at milder temperatures. Using Al as reductant and Pd/C as catalyst, yields as high as 38 % were obtained at 200ºC, compared with the highest yield (57 %) observed at 250 ºC. Thus a significant temperature reduction can be achieved using a suitable combination of reductant and catalyst. Using this reaction system, Pd/C as catalyst and Al as reductant, an extensive set of experiments at different times and temperatures were performed in order to determine the kinetics of the process and correlate them to a mathematical model of the process. The model correctly reproduces the experimental data with average errors lower than 5.9 %. These results demonstrate the feasibility of lower the operating temperature while maintaining the performance, when using an adequate combination of catalyst and reductant.
PB Elsevier
SN 2212-9820
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/58446
UL https://uvadoc.uva.es/handle/10324/58446
LA eng
NO Journal of CO2 Utilization Volume 68, 2023, 102369
NO Producción Científica
DS UVaDOC
RD 26-nov-2024