Phase change behavior and kinetics of CO2 absorption into DMBA/DEEA solution in a wetted-wall column

Kinetics and Thermodynamics of CO2 Absorption into a Novel DETA-AMP-PMDETA Biphasic Solvent

“…It should be noted that the fresh biphasic solvent was homogeneous, and phase separation did not occur in the kinetics experiment. Therefore, the kinetics experiment of biphasic solvents could be operated as that of traditional homogeneous absorbents . To conduct the experiment, CO 2 (15–20 vol %) was mixed with N 2 (80–85 vol %) to simulate the typical flue gas.…”

“…As a result, energy consumption can be remarkably reduced due to a smaller amount of solution for regeneration. , A case in point is the DMX phase-changing solvent developed by IFP Energies Nouvelles, which could reach a reboiler heat duty of 2.1 GJ·ton –1 CO 2 , much lower than the 3.7 GJ·ton –1 CO 2 requirement of the 30 wt % MEA process. , Another biphasic solvent composed of 3-(methylamino) propylamine (MAPA) and diethylethanolamine (DEEA) could also remarkably reduce the specific reboiler heat duty to around 2.2–2.4 GJ·ton –1 CO 2 . More recently, some newly emerging bisolvent biphasic solvents, such as 1,4-butanediamine (BDA) and DEEA blend, N , N -dimethylbutylamine (DMBA) and DEEA blend, triethylenetetramine (TETA) and dimethylcyclohexylamine (DMCA) blend, diethylenetriamine (DETA) and pentamethyldiethylenetriamine (PMDETA) blend, and TETA and N,N,N′,N’ -tetramethyl-1,3-propanediamine (TMPDA) blend, have been investigated for further improving the energy requirement of solvent regeneration. In our previous work, a novel trisolvent biphasic solvent of DETA, 2-amino-2-methyl-1-propanol (AMP), and PMDETA was developed for the purpose of energy-saving CO 2 capture .…”

“…The results suggested that the CO 2 reaction rate could be approximated as the formation rate of MAPA carbamate, whereas DEEA as a strong proton receiver made a great contribution to the observed kinetics constant. In addition, Wang et al , established kinetics models of CO 2 absorption into DETA-DEEA and DMBA-DEEA biphasic solvents and concluded that the CO 2 absorption was mainly affected by the liquid film diffusion process. Although the above works have provided useful references for studying the kinetics of CO 2 absorption into bisolvent biphasic systems, kinetics information for the trisolvent biphasic solvent is rare.…”

CO2 capture using highly viscous amine blends in non-porous membrane contactors

“…Although it was not possible to identify one specific solvent with superior characteristics, several amines showed significantly better performance compared to MEA. A promising approach is offered by amine blends, which exploit the fast kinetics associated to primary/secondary amines and the larger sorption capacity and low heat of absorption related to tertiary/sterically hindered amines [5,[9][10][11]. In particular, blends containing 3-(methylamino)propylamine (MAPA) and tertiary amines (referred also as third generation solvents) showed much better performance compared to traditional MEA-based solvents, both in terms of cyclic capacity and regeneration energy requirements [12,13].…”

Detailed performance model of carbon dioxide absorption utilizing titanium dioxide nanoparticles in a wetted wall column

“…Recently, numerous studies have been carried out actively on CO 2 capture from their different emission sources. Due to the Kyoto Protocol, this matter has been the focus of attention worldwide [1][2][3][4]. The post-combustion solvent based process is one of the most developed know-how for CO 2 mitigation [5][6][7].…”