Carbon dioxide adsorption on mesoporous silica surfaces containing amine-like motifs
2010 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 87, no 9, 2907-2913 p.Article in journal (Refereed) Published
The postcombustion separation of CO2 from a flue gas mixture is a unit operation in carbon capture. Today, CO2 is normally separated with alkanolamines in aqueous solutions. These absorption processes are energy intensive and costly. Increased environmental considerations and the significant footprints of many energy sources warrant the development of new gas separation techniques for the competitive implementation of carbon capture and storage technologies. Improved adsorbent-mediated separation processes are candidates for such new low-energy low-cost processes. In this study, porous silica-based adsorbents with amine-like motifs were synthesized. The temperature- and pressure-dependent adsorption of CO2 and CO2/H2O mixtures were determined and compared for these materials. The experimental uptake capacities of the materials modified with primary propyl amine moieties were significantly higher than those of materials modified with bis-ethanol amine or amidine. The propyl-amine-modified samples also showed good selectivity for CO2 over nitrogen gas.
Place, publisher, year, edition, pages
2010. Vol. 87, no 9, 2907-2913 p.
Gas separation, Adsorption, Mesoporous, Carbon dioxide
Materials Chemistry Environmental Sciences
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-43089DOI: 10.1016/j.apenergy.2009.06.008OAI: oai:DiVA.org:su-43089DiVA: diva2:353539
1st International Conference on Applied Energy, Hong Kong, PEOPLES R CHINA, JAN 05-07, 2009