(340a) Adsorption of Carbon Dioxide on Modified SBA-15

Adsorption of carbon dioxide and methane up to 20 bar has been measured in modified SBA materials. Measurements were carried out using a gravimetric equipment (IGA-001 from Hiden-Isochema).

We compare adsorption capacity, selectivity and uptake kinetics for materials that have been grafted with diamine ligands with those obtained through cosynthesis of TEOS with alumina, zirconia and titania.

CO₂ adsorption capacity at 20 bar was larger for samples modified with alumina > titania > zirconia > diamine. More importantly, adsorption kinetics was significantly slower for the samples that contained grafted diamines.