CO2 ADSORPTION UNDER DYNAMIC CONDITIONS: AN OVERVIEW ON RICE HUSK-DERIVED SORBENTS AND OTHER MATERIALS

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...), surface chemistry (polarity, presence of active site and/or 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 a sharp distinction between the two phenomena (in many cases concurrent) is obviously not possible. CO2 adsorption data acquired in a lab-scale fixed bed reactor under dynamic conditions and in typical conditions of post-combustion CO2 capture on materials produced from the work-up of carbonized rice husk were here reported and compared with pertinent literature on commercial and ad- hoc synthetized sorbents. Some attempts to correlate adsorption capacities and materials' textural properties or other relevant adsorption parameters have been also proposed.