Characterization and kinetics of carbon dioxide absorption into aqueous tetramethylammonium glycinate solution

Regeneration performance and absorption/desorption mechanism of tetramethylammonium glycinate aqueous solution for carbon dioxide capture

“…According to the above results and our previous study (Jing et al, 2012), 15% [N 1111 ][Gly] aqueous solution showed a good ability to capture and release CO 2 . Consequently, the effects of regeneration temperature and regeneration cycles were studied on the desorption of 15% CO 2 -saturated [N 1111 ][Gly] aqueous solution.…”

“…The maximal regeneration efficiency was 82.8%, 90.9%, 94.0% and 75.3% while the [N 1111 ][Gly] concentrations were 5%, 10%, 15% and 30%, respectively. According to our previous study (Jing et al, 2012), when [N 1111 ][Gly] concentrations were 5%, 10%, 15% and 30%, the viscosities of the CO 2 -saturated solution were 1.6 MPa s, 1.7 MPa s, 1.9 MPa s and 2.8 MPa s, respectively. The viscosity of 30% [N 1111 ][Gly] saturated solution was much higher than that of 5-15% solutions.…”

“…This was consistent with our experimental results. Different from the desorption process, our previous study (Jing et al, 2012) revealed that temperature had little influence on the absorption of CO 2 in 15% [N 1111 ][Gly] aqueous solution (303-323 K).…”

“…The CO 2 loading of the saturated solution increased from 0.169 to 0.601 mol CO 2 /mol IL as the mass fraction of [N 1111 ] [Gly] in the solution decreased from 100% to 30%. It had been revealed in our group that the absorption rate of CO 2 into 30% [N 1111 ][Gly] solution was much higher than that of 30% TEA and 30% DEA, and only slightly lower than that of 30% MEA (Jing et al, 2012). Moreover, as the mass fraction of [N 1111 ] [Gly] in the solution decreased from 30% to 10%, CO 2 loading of the saturated solution increased from 0.601 to 0.721 mol CO 2 /mol IL.…”

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

“…This technique has been widely applied to determine reaction rate constants involved in chlorine hydrolysis, H 2 S absorption in chlorine solution, flue desulfurization, NOx absorption or CO 2 capture in amine solutions. [5][6][7][8][9][10][11][12][13][14][15][16] Most of time, reactive absorption is applied using (i) batch reactors in which the gas and liquid phases are separated by a flat interface (stirred-cell reactor). The absorption rate, and consecutively the reaction rate, are deduced 4 pressure at the contactor outlet was nearly identical to the inlet one, and only the reactant concentration decay over time was recorded to determine the mass-transfer and chemical reaction rates.…”