CO₂capture by dry alkanolamines and an efficient microwave regeneration process

Abstract

Dry alkanolamines shown here are found to be highly efficient CO2sorbents and recyclableviamicrowave regeneration.

Epoxide-Functionalization of Grafted Tetraethylenepentamine on the Framework of an Acrylate Copolymer as a CO2 Sorbent with Long Cycle Stability

“…CO 2 capture and storage from large emission sources, such as flue gas and natural gas, has already been considered as the immediate and effective solution to delay the rapidly rising air temperature. − Compared with other carbon capture technologies, such as amine scrubbing and membrane separation, solid adsorption has the advantages of low energy penalty, simple equipment and separation process, and no secondary pollution. , Among various materials, amine-containing solids have been considered as the most promising candidates because of their high adsorption capacity, high selectivity, and low desorption temperature. , For instance, the thermal energy requirement and cost of a polyethyleneimine (PEI)/silica-based adsorption system are 2.46 GJ and $24.5 per metric ton of CO 2 , − whereas the corresponding thermal energy and cost of a 30% monoethanolamine absorption system are 3.90 GJ/tCO 2 , and $70, respectively . These advantages can be associated with the optimum equilibrium conversion between adsorption and desorption.…”

High CO2 absorption in new amine based-transition-temperature mixtures (deep eutectic analogues) and reporting thermal stability, viscosity and surface tension: Response surface methodology (RSM)

“…[6][7][8][9] Amine-based chemical absorption technology was developed to remove CO2 about 70 years ago. 10 There are, however, several inherent drawbacks related to using amine solvents which limit the use of amine-based technology, especially, the large energy requirements for solvent regeneration, formation of corrosive byproducts, solvent losses and solvent degradation products, [11][12][13][14][15][16][17][18][19] and these inherent drawbacks limit the use of amine-based technology. Therefore, the design of alternative solvents for CO2 removal is of high importance and researchers are trying to synthesize and explore new efficient solvents as alternatives to traditional CO2 absorbents.…”

Insights into the Dielectric-Heating-Enhanced Regeneration of CO2-Rich Aqueous Amine Solutions

“…MW irradiation has been reported to be highly effective for CO 2 recovery systems using materials such as porous activated carbon, MEA solution, nonaqueous MEA solution, and perfluorinated silica-stabilized dry alkanolamines . Dielectric heating is expected to directly heat the CO 2 -rich amine agents and release CO 2 in an energy-efficient way .…”

“…22 MW irradiation has been reported to be highly effective for CO 2 recovery systems using materials such as porous activated carbon, 23 MEA solution, 24 nonaqueous MEA solution, 25 and perfluorinated silica-stabilized dry alkanolamines. 26 Dielectric heating is expected to directly heat the CO 2 -rich amine agents and release CO 2 in an energy-efficient way. 26 the mechanism of the enhanced regeneration of an amine solution is relevant to improve the efficiency of the regeneration process by dielectric heating.…”

“…26 Dielectric heating is expected to directly heat the CO 2 -rich amine agents and release CO 2 in an energy-efficient way. 26 the mechanism of the enhanced regeneration of an amine solution is relevant to improve the efficiency of the regeneration process by dielectric heating. In dielectric heating, heat is generated by the relaxation of the molecular orientation and vibration of ions.…”