Amine modified, micro-mesoporous matrices for CO2 retention: effect of occluded templates on performance

ELENA I. BASALDELLA; M. SOLEDAD LEGNOVERDE; ESTHER N. PONZI; JUAN C. TARA; NORBERTO FIRPO; EDGARDO L. SOTO

Conferencia; 4th. International FEZA Conference; 2008

One of the new research field devoted to explore the different CO2 capture technologies involves the use of novel adsorbents.             The purpose of this work is to develop adsorbents presenting a tailored surface functionality for improved CO2 adsorption. We synthesized two types of porous matrices: SBA-15 silica and MCM-22 zeolite. Different quantities of amine groups were incorporated to these ordered materials by post-synthesis impregnation. Our results show that high capacities were obtained using the impregnated samples. Occluded template and amino groups favour the adsorption on SBA-15, meanwhile the best results using MCM-22 were obtained impregnating the free-template samples. In these samples, approximately 90% of CO2 adsorption occurred almost instantaneously, and was removed just as rapidly at room temperature with an inert gas flow.