RT info:eu-repo/semantics/article
T1 CO2-rich and CO2-lean streams as activators of reducing metals for the green hydrogen generation and the catalytic production of formate
A1 Rio Blandon, Juan Ignacio Del
A1 Almarza Barbado, Miguel
A1 Martín Martínez, Ángel
A1 Bermejo Roda, Maria Dolores
K1 Catalysts assessment
K1 CO2 utilization
K1 Hydrogen evolution
K1 Formic acid production
K1 Metal-water splitting
AB The ongoing pursuit of carbon mitigation and utilization encourages the study of common and more abundant materials, capable of facilitating the technical readiness of the processes involved. In this context, the present work aims at evaluating the CO2-rich and CO2-lean streams from the basic aqueous absorption CO2 capture processes, for the in-situ generation of green hydrogen through the metal-water splitting technology, to convert captured CO2 into formate. Experiments have been carried out using aluminum and zinc as reducing agents, and the commercial catalysts palladium, platinum and ruthenium supported on activated carbon, using a batch stirred reactor. Aluminum and Pd5AC constituted the best metal/catalyst system, with a formate yield of 22 %, selectivity of 32 %, and conversion of 67 %. The H2-TPR characterization of the catalysts, before and after reaction, showed that only Pd5AC catalyst shows insights of active hydride specie, responsible for the reduction of captured CO2. The in-situ hydrogen evolution was studied during prolonged 10 h experiments, in absence of catalyst, to compare the performance of the proposed basic streams and reducing metals, generating high reliability data in search for feasibility and future integration of CO2 and H2 economies.
PB Elsevier
SN 0016-2361
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73106
UL https://uvadoc.uva.es/handle/10324/73106
LA eng
NO Fuel, 2024, vol. 372, 132146
NO Producción Científica
DS UVaDOC
RD 04-abr-2025