Designing Adsorbents for CO2 Capture from Flue Gas-Hyperbranched Aminosilicas Capable of Capturing CO2 Reversibly

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• 作者：Jason C. Hicks ; Jeffrey H. Drese ; Daniel J. Fauth ; McMahan L. Gray ; Genggeng Qi ; Christopher W. Jones
• 刊名：Journal of the American Chemical Society
• 出版年：2008
• 出版时间：March 12, 2008
• 年：2008
• 卷：130
• 期：10
• 页码：2902 - 2903
• 全文大小：34K
• 年卷期：v.130,no.10(March 12, 2008)
• ISSN：1520-5126

文摘

Carbon dioxide adsorption from a simulated flue gas stream was successfully performed with a hyperbranched aminosilica (HAS) material. The HAS was synthesized by a one-step reaction, spontaneous aziridine ring-opening polymerization off of surface silanols, to form a 32 wt % organic/inorganic hybrid material. The adsorption measurements were performed in a fixed-bed flow reactor using humidified CO₂. The advantage of this adsorbent over previously reported adsorbents is the stability of the organic groups covalently bound to the silica support compared to those made by physisorbed methods. Furthermore, a large CO₂ capacity (~3 mmol CO₂/g adsorbent) associated with the high loading of amines was observed.