Ethylenediamine-modified SBA-15 as regenerable CO2 sorbent

被引：249

作者：

Zheng, F ^{[1
]}

Tran, DN ^{[1
]}

Busche, BJ ^{[1
]}

Fryxell, GE ^{[1
]}

Addleman, RS ^{[1
]}

Zemanian, TS ^{[1
]}

Aardahl, CL ^{[1
]}

机构：

[1] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2005年 / 44卷 / 09期

关键词：

D O I：

10.1021/ie049488t

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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 N-2 at 25 degrees C and 1 atm total pressure. In pure CO2 at 1 atm, its adsorption capacity is 86 mg/g at 22 degrees C. The EDA-SBA-15 sorbent is fully regenerable by thermal swings during cyclic adsorption/desorption. Desorption of CO2 occurs at 110 degrees C on EDA-SBA-15 and the sorbent is stable in air up to 200 degrees 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.

引用

页码：3099 / 3105

页数：7

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