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Experimental investigation of phase change amine solutions used in CO2 capture applications: Systems with dimethylcyclohexylamine (DMCA) and Ncyclohexyl-1,3-propanediamine (CHAP) or 3-methylaminopropylamine (MAPA)
International Journal of Greenhouse Gas Control ( IF 3.9 ) Pub Date : 2021-05-15 , DOI: 10.1016/j.ijggc.2021.103353
Fragkiskos Tzirakis , Ioannis Tsivintzelis , Athanasios I. Papadopoulos , Panos Seferlis

Solvent-based absorption/desorption is a promising CO2 capture technology, but its wide industrial implementation is prohibited by the high energetic requirements incurred by conventional amine solvents. Such challenges can be addressed by phase-change solvents that have been shown to enable both lower energy consumption and capture costs. Despite their clear advantages, the limited availability of detailed phase equilibrium data hinders their consideration in scaling-up studies of phase-change CO2 capture processes. In this study, CO2 loading and phase compositions of novel phase change aqueous amine solutions are experimentally investigated. Phase equilibrium experiments are carried out to measure the CO2 loading of aqueous mixtures containing N,N-dimethylcyclohexylamine (DMCA) with 3-methylaminopropylamine (MAPA) and N,N-dimethylcyclohexylamine (DMCA) with Nsingle bondCyclohexyl-1,3-propanediamine (CHAP) at 40, 60 and 90 °C. It is observed that both systems exhibit phase change behavior, while DMCA-CHAP presents higher cyclic capacity and rather low volatility losses.



中文翻译:

用于CO 2捕集应用的相变胺溶液的实验研究:带有二甲基单键环己胺(DMCA)和N环己基-1,3-丙二胺(CHAP)或3-甲基氨基丙胺(MAPA)的系统

基于溶剂的吸收/解吸是一种有前途的CO 2捕集技术,但由于常规胺溶剂对能量的高要求,其广泛的工业应用受到了限制。可以通过相变溶剂解决此类挑战,这些相变溶剂已被证明能够降低能耗和捕获成本。尽管它们具有明显的优势,但是详细的相平衡数据的有限可用性阻碍了它们在按比例研究相变CO 2捕集过程中的考虑。在这项研究中,实验研究了新型相变胺水溶液的CO 2负载量和相组成。进行相平衡实验以测量CO 2在40、60和90°C下分别填充含有N,N-二甲基环己胺(DMCA)和3-甲基氨基丙胺(MAPA)和N,N-二甲基环己胺(DMCA)和N单键环己基-1,3-丙二胺(CHAP)的水性混合物。观察到两个系统都表现出相变行为,而DMCA-CHAP表现出更高的循环容量和相当低的挥发性损失。

更新日期:2021-05-17
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