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- W2319327061 abstract "Abstract Geopolymer materials, a new class of alkali-bonded ceramics, have been prepared in monolith porous form, in order to investigate the adsorptive performances of CO 2 and light gases (CH 4 and N 2 ) by means of a volumetric method in the sub-atmospheric pressure range. The samples have been produced by reacting an aluminosilicate powder with an aqueous alkali silicate solution, in different dilution proportions, achieving very high geopolymerization conversion (higher than 97%). The monoliths microstructural and textural properties have been first characterized by SEM and porosimetric measurements, which revealed the structure of the geopolymer as mainly consisting of nanoprecipitates and mesopores, with overall porosity from 30% up to 60%, and BET surface area up to 50 m 2 /g. The analysis of the gas adsorption properties showed a quite good capacity for CO 2 in the geopolymer monoliths, remarkably higher than those of CH 4 and N 2 , pointing out the significant ability in the selective capture of CO 2 of these geopolymers. The values of selectivity in capacity obtained from the adsorption measurements, up to 200 and 100 for CO 2 /N 2 and CO 2 /CH 4 separation, respectively, are considerably higher than those of most of the adsorbent materials commonly accounted for in such applications." @default.
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- W2319327061 date "2016-07-01" @default.
- W2319327061 modified "2023-10-14" @default.
- W2319327061 title "Geopolymers as solid adsorbent for CO2 capture" @default.
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- W2319327061 doi "https://doi.org/10.1016/j.ces.2016.04.013" @default.
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