Enhancement factor and kinetics of CO2 capture by MEA-methanol hybrid solvents

An investigation of the role of N-methyl-diethanolamine in non-aqueous solution for CO2 capture process using 13C NMR spectroscopy

“…However, energy consumption has been demonstrated to be the key factor reducing the efficiency of power plants by many researchers (Chakma, 1995;Oexmann and Kather, 2010;Tan et al, 2011). Recently, non-aqueous solutions have been extensively investigated using organic solvents, such as methanol, ethanol, ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol (TEG), diethylene glycol monomethyl ether (DGME), Nmethyl-2-pyrrolidone (NMP) and tributyl phosphate (TBP) (Leites, 1998;Jou et al, 2000;Park et al, 2005Park et al, , 2006aUsubharatana and Tontiwachwuthikul, 2009;Hwang et al, 2010;Tan et al, 2011), which provide significant advantages as for reducing solvent decomposition at high temperature and saving water evaporation energy in the CO 2 stripping process (Barzagli et al, 2013Yu et al, 2013.…”

CO2 absorption into N-methyldiethanolamine aqueous-organic solvents

“…Clarke et al [47] considered that the CO 2 solubility in organicaqueous solutions of alkanolamines was not particularly affected by the presence of the amine, and recent researches [24,33,48,49] have shown concordance with this conclusions. In this work, the hypothesis that the CO 2 solubility in organic-aqueous MDEA solutions is not dependent on the amine concentration has been assumed.…”

“…The possibility of employing alkanolamines in hybrid solvents (chemical and physical solvents) in order to remove acid gases has attracted great interest, and several research groups have studied the use of aqueous and non aqueous solutions of alkanolamines in the separation of H 2 S and CO 2 [22][23][24][25][26]. The addition of an organic compound to an aqueous tertiary amine solution in the CO 2 absorption process may lead to favorable effects due to the combined different physical and chemical properties, thereby hybrid organic-aqueous solvents are expected to have higher absorption capacity and selectivity than the pure solvent.…”

Phase-Change CO2 Absorption Using Novel 3-Dimethylaminopropylamine with Primary and Tertiary Amino Groups

“…CO 2 has a lower Henry Coefficient in NHD than that in water at the same temperature . Higher CO 2 solubility is beneficial to CO 2 diffusion in the solution and decreases the resistance of the liquid film to enhance the reaction between the amine and CO 2 . , …”