Ethylenediamine-Modified SBA-15 as Regenerable CO2 Sorbent
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- 作者：Feng Zheng ; Diana N. Tran ; Brad J. Busche ; Glen E. Fryxell ; R. Shane Addleman ; Thomas S. Zemanian ; and Christopher L. Aardahl
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2005
- 出版时间：April 27, 2005
- 年：2005
- 卷：44
- 期：9
- 页码：3099 - 3105
- 全文大小：288K
- 年卷期：v.44,no.9(April 27, 2005)
- ISSN：1520-5045
文摘
The CO2 adsorption properties of an ethylenediamine-modified mesoporous silica, EDA-SBA-15, have been examined. Adsorption isotherms were collected by TGA measurements, and thebreakthrough time and adsorption capacity were measured using a fixed-bed flow system. TheEDA-SBA-15 sorbent adsorbs around 20 mg/g of CO2 from 15% CO2 in N2 at 25 
C and 1 atmtotal pressure. In pure CO2 at 1 atm, its adsorption capacity is 86 mg/g at 22 C. The EDA-SBA-15 sorbent is fully regenerable by thermal swings during cyclic adsorption/desorption.Desorption of CO2 occurs at 110 C on EDA-SBA-15 and the sorbent is stable in air up to 200C. The CO2 uptake by EDA-SBA-15 is not influenced by humidity. The adsorption capacitydata are compared with those of previously reported amine-modified silica sorbents.
C and 1 atmtotal pressure. In pure CO2 at 1 atm, its adsorption capacity is 86 mg/g at 22 C. The EDA-SBA-15 sorbent is fully regenerable by thermal swings during cyclic adsorption/desorption.Desorption of CO2 occurs at 110 C on EDA-SBA-15 and the sorbent is stable in air up to 200C. The CO2 uptake by EDA-SBA-15 is not influenced by humidity. The adsorption capacitydata are compared with those of previously reported amine-modified silica sorbents.