화학공학소재연구정보센터
Thermochimica Acta, Vol.624, 95-101, 2016
Insights in CO2 interaction on zeolite omega-supported polyol dendrimers
Omega-type zeolite was prepared by hydrothermal crystallization method, then impregnated with different Boltorn H-20, H-30 and H-40 polyol dendrimers and further tested as adsorbents for carbon dioxide (CO2). Unmodified omega zeolite showed weak intrinsic affinity toward CO2, which was significantly improved by impregnation with polyol dendrimers, as supported by TPD measurements. This was explained in terms of both acidity attenuation via surface covering by the dendrimer layer and incorporation of amphoteric to slightly base-like OH groups belonging to the organic moiety. TPD and DSC measurements revealed that CO2 is adsorbed via both physical and chemical interactions. CO2 adsorption was found to strongly depend on the structure of both the inorganic support and organic moieties. However, The inorganic support was also found to contribute to CO2 retention. The adsorbent effectiveness was discussed herein in terms of CO2 retention capacity (CRC) and interaction strength. (C) 2015 Elsevier B.V. All rights reserved.