Wet impregnation of a commercial low cost silica using DETA for a fast post-combustion CO2 capture process

This work presents an economic and non-tedious method to manufacture low cost, but effective adsorbents for CO2 capture through impregnating DETA to a low cost, porous silica gel. The results have demonstrated that the silica gel support, impregnated by low molecular-weight amine is stable and work very well at a temperatures up to 130 °C. The developed adsorbent has a fast adsorption kinetics and can be regenerated at a low temperature. This will significantly reduce the energy used to regenerate CO2, therefore the energy penalty of the capture/separation process. The effect of amine loading on the textural properties, thermal stability, and CO2 capture performance of the impregnated silica gel is also reported in this paper. 10% amine loading gives the best porosity, stability and the highest adsorption capacity.