Synthesis and characterization of amine-modified mesoporous Santa Barbara Amorphous-15 for carbon dioxide sequestration at high pressure and room temperature

چکیده مقاله

Amine-modified mesoporous Santa Barbara Amorphous (SBA)-15 adsorbent has been prepared by impregnation method using tetraethylenepentamine. The samples of this modified SBA-15 have been characterized by small angle X-ray scattering (SAXS), Scanning electron microscopy (SEM), Nitrogen adsorption-desorption isotherm and FT-IR. The adsorption capacity of CO₂ on unmodified and modified samples were measured at high pressure (up to 20 bar) and room temperature and were 2.69, 4.02 and 3.62 mmol CO₂/g for SBA-15, TEPA (55%)-SBA-15 and TEPA (65%)-SBA-15, respectively. The increment in the CO₂ adsorption capacity of amine modified mesoporous material (TEPA (55%)-SBA-15) is attributed to the increased amine mass interaction with CO₂. Further increase of amine content clogs the pores of the sorbent which results in slight reduction of CO₂ adsorption in TEPA (65%)-SBA-15). © 2016, Materials and Energy Research Center. All rights reserved.