Study of the sorption properties of a Li4SiO4-based sorbent in the presence of water and low CO2 concentration

DIANA PELTZER; BETINA FAROLDI; JOHN MÚNERA; LAURA CORNAGLIA

Santa Fe

Workshop; French-Argentinean Workshop on Heterogeneous Catalysis; 2023

INCAPE

Among human activities which generate greenhouse gases (GHG), energy production accounts for around 75% of the total shares [1], and CO2 is considered the largest source of GHG in this category. In this context, diverse strategies for low carbon-energy production have been raised. Between these technologies, CO2 capture at high temperatures can be used in power generation systems to decarbonize post-combustion gases or can be coupled to H2 production from fossil fuels to generate blue H2, a less carbon-intensive variation of grey H2.The sorbents for CO2 capture at high temperatures retain the CO2 by means of the reversible carbonation reaction. Therefore, significant efforts are being made in the development of sorbents with high cyclic stability, reaction kinetics, and capture capacity. The most studied sorbents include CaO, alkaline zirconates, and silicates, though other materials have also been explored. In our group, we have developed a Li4SiO4-based sorbent which have proved good kinetics and capture properties in dry conditions and high CO2 concentrations [2]. Hence, this contribution aims to study the capture properties of this sorbent in conditions similar to the reforming or post-combustion systems, including the presence of low CO2 concentration and a variable amount of water.