Tetraethylenepentamine-modified mesoporous adsorbents for CO2 capture: effects of preparation methods

被引：28

作者：

Liu, Shou-Heng ^{[1
]}

Hsiao, Wei-Che ^{[1
]}

Sie, Wun-Hu ^{[1
]}

机构：

[1] Natl Kaohsiung Univ Appl Sci, Dept Chem & Mat Engn, Kaohsiung 80778, Taiwan

来源：

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY | 2012年 / 18卷 / 5-6期

关键词：

Tetraethylenepentamine; Surface modification; Mesoporous silica; CO2; capture; Durability; CARBON-DIOXIDE CAPTURE; METAL-ORGANIC FRAMEWORKS; FLUE-GAS; ADSORPTION; AMINE; SILICA; TEMPLATE; SBA-15; PERFORMANCE; SEPARATION;

D O I：

10.1007/s10450-012-9429-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Tetraethylenepentamine (TEPA)-modified mesocellular silica foams (MSFs) were fabricated via physical impregnation (MSF-T-x) and chemical grafting (MSF-CT-y) methods. The CO2 adsorption on these TEPA-modified MSFs was measured by using microbalances at 348 K and their adsorption capacities were observed to be 26.4-193.6 mg CO2/g-sorbent under ambient pressure using dry 15 % CO2. It was found that the CO2 adsorption capacities of MSF-CT-y were smaller than those of MSF-T-x sorbents which may be attributed to their higher density of amine groups. On the contrary, MSF-CT-y exhibited enhanced stability during repeated adsorption-desorption cycles compared to MSF-T-x sorbents. This notable enhancement in the durability of CO2 adsorption-desorption process was probably attributed to the decreased leaching of TEPA which is chemically bonded to the surface of MSF.

引用

页码：431 / 437

页数：7

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