The current work builds on previous works on grafting of organosilanes on mesoporous silica supports using a supercritical CO 2 anhydrous method, and it extends them by examining the capacity of supercritically prepared aminosilica hybrid products for CO 2 adsorption and its separation from mixtures with other gases. The CO 2 adsorption capacity under dry conditions of mesoporous silica gel and MCM-41 functionalized with a monoaminosilane was evaluated first by recording CO 2 adsorption isotherms and next by performing microbalance cyclic adsorption/desorption experiments at 25 and 45 °C. CO 2 adsorption and desorption rates were also studied as a function of the aminosilane loading. CO 2 adsorption results were compared to similar data available in the literature, showing improved performance for the supercritically prepared products related to the CO 2 adsorption efficiency and cyclic regenerability.
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López‐Aranguren et al. (2014) studied this question.
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