Ethylenediamine-modified SBA-15 as Regenerable CO2 Sorbent
Ethylenediamine-modified SBA-15 as Regenerable CO2 Sorbent
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DOI：
10.1021/ie049488t
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发表时间：
2005-03
影响因子：
4.2
通讯作者：
F. Zheng;D. Tran;B. Busche;G. Fryxell;R. Addleman;T. Zemanian;C. L. Aardahl
中科院分区：
文献类型：
--
作者：
F. Zheng;D. Tran;B. Busche;G. Fryxell;R. Addleman;T. Zemanian;C. L. Aardahl
研究了乙二胺修饰的介孔氧化硅材料EDA-SBA-15的CO2吸附性能。通过TGA测量收集吸附等温线，并且使用固定床流动系统测量穿透时间和吸附容量。EDA-SBA-15吸附剂在25 °C和Iatm总压力下从N2中的15% CO2吸附约20 mg/g的CO2。在1 atm的纯CO2中，其吸附容量在22 °C时为86 mg/g。EDA-SBA-15吸附剂在循环吸附/解吸期间通过热摆动完全可再生。EDA-SBA-15在110 °C下发生CO2解吸，并且吸附剂在高达200 °C的空气中稳定。EDA-SBA-15的CO2吸收不受湿度的影响。的吸附容量数据进行比较与以前报道的胺改性的二氧化硅吸附剂。
The CO2 adsorption properties of an ethylenediamine-modified mesoporous silica, EDA-SBA-15, have been examined. Adsorption isotherms were collected by TGA measurements, and the breakthrough time and adsorption capacity were measured using a fixed-bed flow system. The EDA-SBA-15 sorbent adsorbs around 20 mg/g of CO2 from 15% CO2 in N2 at 25 °C and 1 atm total 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 200 °C. The CO2 uptake by EDA-SBA-15 is not influenced by humidity. The adsorption capacity data are compared with those of previously reported amine-modified silica sorbents.