A comparative study of CO2 sorption properties for different oxides

Abstract

It is essential to capture CO2 from flue gas stream, which is considered as one of the prime reasons of global warming. Although various CO2 capture technologies already exist, most of these techniques are still unfit to be employed at a large scale. In the past one decade, oxides have emerged as a strong candidate to capture CO2 for post-, pre- and oxy-combustion conditions. Oxides combine with CO2 present in the flue gas and form carbonate, which when heated regenerates the oxides and thus liberates almost pure stream of CO2. The selection criteria for potential oxides entail their CO2 capture capacity, absorption rate, thermal stability, regeneration heat, cost and structural properties. Thus, here, we review the technical merit of all the suitable oxides which can be used for CO2 capture at any fossil fuel burning plants.