Adsorption of Carbon Dioxide using Polyethyleneimine Modified Silica Gel

Title
Adsorption of Carbon Dioxide using Polyethyleneimine Modified Silica Gel
Authors
Tao Zhu양세일최대기노경호
Keywords
adsorption; adsorbents; silica gel; carbon dioxide; PEI
Issue Date
2010-10
Publisher
The Korean journal of chemical engineering
Citation
VOL 27, NO 6, 1910-1915
Abstract
To find an ideal adsorbent for carbon dioxide capture, a new polyethyleneimine modified silica gel material was synthesized with a simple procedure. Three silica gel materials with various particle sizes (15, 25 and 40-63 μm) were prepared and functionalized with polyethyleneimine. The carbon dioxide adsorption amounts of modified silica gel and non-modified silica gel were calculated using a mass balance equation at three different temperatures (298.15, 308.15 and 318.15 K), respectively, and the influence of gas pressure and particle size on adsorption was discussed. Experimental data showed that the carbon dioxide adsorption capacity of modified silica gel was better than non-modified silica gel, and the adsorption capacity gradually decreased with increasing particle size. The smaller particle size (15 μm) PEI modified silica gel had the largest adsorption capacity, at 298.15 K, and the adsorption amounts of various particle sizes of PEI-silica better fit the Langmuir isotherm model.
URI
http://pubs.kist.re.kr/handle/201004/38814
ISSN
0256-1115
Appears in Collections:
KIST Publication > Article
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