CO2 ADSORPTION DATA ON DIFFERENT SORBENTS UNDER DYNAMIC CONDITIONS: AN OVERVIEW

CO2 adsorption on solid sorbents under dynamic conditions is driven by a number of factors, among them textural features (pore volumes, pore size distribution, surface area...), the surface chemistry (polarity, active site, unsaturated coordinative sites...) and the overall active sites accessibility. Depending on the strength of the interaction with CO2 (chemisorption or physisorption), solid sorbents are broadly divided in two groups, although of course a sharp distinction between the two phenomena (in many cases concurrent) is not possible. Starting from CO2 adsorption data acquired in dynamic conditions in a lab-scale fixed-bed reactor or in a fluidized-bed reactor on commercial and ad-hoc synthetized sorbents, a first attempt to correlate adsorption capacities and materials textural properties or relevant adsorption parameters (breakthrough times, ?????) was here reported. Typical conditions of post-combustion CO2 capture were selected. Literature data available on CO2 uptake acquired on solid sorbent under experimental conditions comparable to those considered in this work were also included.