Adsorption of Carbon Dioxide using Polyethyleneimine Modified Silica Gel
- Adsorption of Carbon Dioxide using Polyethyleneimine Modified Silica Gel
- Tao Zhu; 양세일; 최대기; 노경호
- adsorption; adsorbents; silica gel; carbon dioxide; PEI
- Issue Date
- The Korean journal of chemical engineering
- VOL 27, NO 6, 1910-1915
- 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.
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