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Communication

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

Supporting Info

Jason C. Hicks,^† Jeffrey H. Drese,^† Daniel J. Fauth,^‡ McMahan L. Gray,^‡ Genggeng Qi,^† and Christopher W. Jones*^†

School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332, and U.S. Department of Energy, National Energy Technology Laboratory, 626 Cochrans Mill Road, Pittsburgh, Pennsylvania 15236

J. Am. Chem. Soc., 2008, 130 (10), pp 2902–2903

DOI: 10.1021/ja077795v

Publication Date (Web): February 19, 2008

†

Georgia Institute of Technology.

‡

U.S. Department of Energy.

In papers with more than one author, the asterisk indicates the name of the author to whom inquiries about the paper should be addressed.

, cjones@chbe.gatech.edu

Abstract

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.

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History

Published In Issue March 12, 2008
Received October 10, 2007

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Communication

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