Thi Quyen Vu, Hidetaka Yamada, F. Chowdhury
Mar 29, 2021
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Social Science Research Network
Abstract
Amine functionalized materials have been widely investigated as promising candidates for CO2 capture. Tetraethylenepentamine (TEPA) is the commercial amine that has been commonly impregnated into porous supports for post-combustion CO2 capture. Commercial technical-grade TEPA is a mixture of four main ethyleneamine compounds with close boiling points including linear, branched, and two cyclic TEPA products. This study investigated the stability of the four main components of TEPA under accelerated oxidizing conditions. The CO2 adsorption performances of the sorbents containing TEPA components decreased after the exposure to O2. Among the isolated components in commercial TEPA, 1,4,7,10,13-pentaazatridecane displayed the most sensitivity to O2, which were supported by infrared spectroscopic, gas chromatography, and NMR analysis.