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| 題名: | Structural properties and reactivities of amino-modified silica fume solid sorbents for low-temperature CO2 capture |
| 作者: | Liu, JL (Liu, Jian-Lin)
Lin, RB (Lin, Ren-Bin) |
| 貢獻者: | Dept Chem & Mat Engn |
| 關鍵詞: | CO2 capture
Solid sorbents
Silica fume
Structural properties
Amine impregnation
Adsorption |
| 日期: | 2013-06 |
| 上傳時間: | 2014-02-25 14:57:59 (UTC+8) |
| 摘要: | In this work, diisopropanolamine (DIPA) and 3-aminopropyltriethoxysilane (APTS) were respectively supported on hydrated silica fume particles by the impregnation method. The amino-modified silica fume solid sorbents were characterized, and their reactivities toward CO2 were evaluated using a thermogravimetric analyzer. All the prepared solid sorbents exhibited a type IV isotherm with a hysteresis loop of type H3. Due to the blocking of micropores and some mesopores, the specific surface areas of the sorbents were significantly reduced when DIPA or APTS was supported. The reactivity of DIPA/silica fume sorbents toward CO2 was higher than that of APTS/silica fume sorbents. The DIPA/silica fume sorbent prepared at a weight ratio of 1.0/1 had a maximum CO2 capture capacity of 1.25 mmol/g sorbent at a relatively low temperature of 30 degrees C, where a CO2/N molar ratio of 0.41 was achieved. The incomplete amino utilizations are mostly due to the thermodynamic equilibrium at the tested temperatures and partly due to the limitations of CO2 mass transfer in the sorbents. Furthermore, the multiple adsorption/desorption cycling results indicate that the solid sorbents are quite stable and regenerable. (C) 2013 Elsevier B.V. All rights reserved. |
| 關聯: | POWDER TECHNOLOGY Volume: 241 Pages: 188-195 |
| 顯示於類別: | [化學工程與材料工程學系暨碩士班] 期刊論文
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