Absorption and regeneration studies of chemical solvents based on dimethylethanolamine and diethylethanolamine for carbon dioxide capture

Abstract

Present research work analyses a new chemical solvents based on the use of two tertiary amines (dimethylethanolamine and diethylethanolamine) for carbon dioxide (CO 2) capture by chemical absorption taking into account the absorption behavior and the solvent regeneration degree. Regarding the first study, the absorption rate is related with the reaction mechanism at different CO 2 loading. Other type of influences such as the type and amine concentration, and gas flow rate fed to the contactor were studied. In relation with solvent regeneration, several experimental procedures have been employed in order to avoid the negative characteristics of loaded-solvent stripping. The results show the important weight of amines acidity constant upon the regeneration yield.

Chemisorption of CO2 in a gas–liquid vortex reactor: An interphase mass transfer efficiency assessment

“…1,2 In view of reducing OPEX, a lot of past research has focused on the development of new solvent types with low heats of absorption, as these are associated with lower thermal energy requirements in the solvent regeneration step. [3][4][5][6][7] Depending on the exact operating conditions, the type of solvent used can possibly also influence the CAPEX of the CO 2 scrubbing equipment, as it influences the sorption rate at high solvent concentrations. 8 However, there is another path to tackle the above challenges in the CO 2 capture industry, namely by developing process intensification equipment/methods to increase the energy efficiency and decrease the capital cost.…”

“…The state‐of‐the‐art technologies for CO 2 capture are characterized by high OPEX and CAPEX mainly due to significant energy requirements for solvent regeneration and large column sizes, respectively 1,2 . In view of reducing OPEX, a lot of past research has focused on the development of new solvent types with low heats of absorption, as these are associated with lower thermal energy requirements in the solvent regeneration step 3–7 . Depending on the exact operating conditions, the type of solvent used can possibly also influence the CAPEX of the CO 2 scrubbing equipment, as it influences the sorption rate at high solvent concentrations 8 .…”

Characterization of Alkanolamine Blends for Carbon Dioxide Absorption. Corrosion and Regeneration Studies

“…The temperature was monitored during the experimental procedure and two condensers were used to prevent evaporation of the solvent. In order to reduce the decrease in amine concentration, the optimized regeneration time was minimized [31].…”

CO2 absorption intensification using three‐dimensional printed dynamic polarity packing in a bench‐scale integrated CO2 capture system

“…In addition, many advanced absorbents have been proposed for low regeneration energy cost but meanwhile they are facing the rise of viscosity 10,11 . As well known, increasing absorbent viscosity leads to lower diffusivity within the liquid phase, 12 larger liquid holdup, 13,14 and thicker liquid film, 15,16 which means greater mass transfer resistance for CO 2 absorption 17 .…”