Effect of water content on the characteristics of CO2 capture processes in absorbents of 2-ethylhexan-1-amine + diglyme

Kun Fu, Mingzhen Zheng, Haijie Wang and Dong Fu

Energy, 2022, vol. 244, issue PA

Abstract: In our recent study (Fu et al., 2021), 70 wt% 2-ethylhexan-1-amine (EHA) + 30 wt% diglyme was proven to be a promising system for carbon dioxide (CO2) absorption. In this work, the capture performance of 15 kPa CO2 in 70 wt% EHA + (30 or 25 or 20) wt% diglyme solution was investigated. The evolution of solution composition during the capture process was identified. The time-dependent absorption and desorption capacities were accurately correlated by using the modified Avrami model. After 90 min of absorption, the proposed sorbents maintained relatively low viscosities (≤32.07 mPa s) and had much lower heat capacities than the aqueous 30 wt% ethanolamine (MEA). The CO2 desorption capacities of the sorbents containing 0 wt%, 5 wt% and 10 wt% water were higher than that of the aqueous 30 wt% MEA by 134.1%, 123.6% and 91.7%, respectively. The regeneration efficiency of the sorbents containing 0 wt%, 5 wt% and 10 wt% water was 92.1%, 87.9% and 83.8%, respectively, in the 5th absorption (313 K) - desorption (373 K) cycle. Furthermore, it is encouraging to note that the energy consumption for CO2 desorption of proposed sorbents was below 20% of that of the aqueous 30 wt% MEA.

Keywords: CO2 capture performance; 2-Ethylhexan-1-amine; Diglyme; Water content; Energy consumption; Solution composition (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221029054
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:244:y:2022:i:pa:s0360544221029054

DOI: 10.1016/j.energy.2021.122656

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().