Adsorption of CO2 by iron-exchanged heteropolyacid Fe1.5PMo12O40 supported on mesoporous cellular foams

Abstract

Novel low-temperature swing adsorbents that preferably adsorb CO 2 were synthesized by varying loading of heteropolyacid Fe 1.5 PMo 12 O 40 (Fe-PMA) supporting on mesoporous cellular foams (MCFs) by wetting impregnation. The synthesized materials were characterized by various physicochemical, thermal and spectral techniques and the CO 2 adsorption capacity of the materials were evaluated. Solid adsorbents showed a significantly high adsorption capacity toward CO 2 due to the chemisorptions of CO 2 . The CO 2 adsorption capacities of the materials decreased as the temperature increased. The results showed that the adsorption capacity reached a level of 81.8 mg CO 2 /g-adsorbent at 25°C for the 20 wt% Fe-PMA-MCFs. These results indicated that the iron (Fe 2? ) complexes acted as efficient catalysts for the separation of CO 2 . The as-synthesized adsorbents were selective, thermally stable, long-lived, and could be recycled at a temperature of 110°C.

Adsorption of Carbon Dioxide on Shirasu‐based Materials

“…Adsorption processes of carbon dioxide in solution [1][2][3][4][5] and on solid materials [6][7][8] has been proposed as promising processes for storing carbon dioxide excessively emitted into the atmospheric environment. In the various processes via adsorption, porous solid materials including oxide ceramics such as aluminosilicate including zeolites, [9][10][11][12][13][14][15][16][17][18][19][20][21][22] mesoporous silicas, [23][24][25][26][27][28][29][30] metal oxides, [31][32][33] carbon-based materials, [34][35][36][37][38] and metal-organic-frameworks (MOFs) [39][40][41] have attracted much attention for cyclic adsorption uses in low-cost simple adsorption processes of carbon dioxide.…”