An experimental correlation for mass transfer flux of CO₂ reactive absorption into aqueous MEA‐PZ blended solution

Abstract

In this study, the thermodynamics and mass transfer of CO 2 absorption in the aqueous monoethanolamine-piperazine blended solution have been studied. A correlation is proposed for the mass transfer flux of CO 2 reactive absorption.The effective parameters on the mass transfer flux are considered in both the liquid and gas phases using dimensional analysis Pi-Buckingham theorem.The effective variables were extracted as a dimensionless parameter. The dimensionless parameters are calculated from experimental data presented in the literature. The unknown constants of the mass transfer flux correlation are obtained using nonlinear regression. In the proposed correlation, the effect of operating parameters including the partial pressure, temperature, and also the dimensionless parameters of the film parameter, enhancement factor, and loading are investigated. The results showed that by increasing the loading and film parameter, the mass transfer flux was reduced. The mean absolute deviation in the proposed correlation for mass transfer flux was about 4.5%, which indicates the high accuracy of the predicted equation.

Triethanolamine‐modified montmorillonite clay as a new adsorbent for CO2 capture: Characterization, adsorption, and RSM modeling

“…[ 6–8 ] Adsorption by solvent‐containing amino particles is a well‐known technology for the adsorption of CO 2 produced from gaseous fuels, which has been extensively researched. [ 9,10 ] Membrane separation is another method for separating CO 2 from gases in power plants where the concentration of carbon dioxide produced is high. [ 11 ] In general, CO 2 separation can be divided into four general categories: washing with physical or chemical solvents, adsorption process, cooling process, and membrane process, each of which has its own characteristics.…”

CO2 absorption into potassium hydroxide aqueous solution: experimental and modeling

“…Nevertheless, this way has problems such as high energy consumption to regenerate amine-based solvents, the corrosive nature of these solvents and high corrosion of process equipment, high solvent losses due to high volatility of these solvents and high rate of amine-based solvents degradation [12]. Absorbents like blended amines or piperazine (secondary amine) which have received increased attention [13,14], also have some disadvantages of amine solvents. The absorption of CO 2 by alkali metal hydroxides has been studied since the beginning of the twentieth century, and these solvents have been used for several applications [15][16][17][18].…”

Comparison of hydroxide‐based adsorbents of Mg(OH)2 and Ca(OH)2 for CO2 capture: utilization of response surface methodology, kinetic, and isotherm modeling

“…Because the required cooling steps in the cryogenic distillation leads to high energy requirements, this process is also less suitable for this purpose 8,9 . Absorbent regeneration, equipment corrosion, and the potential of absorbent degradation are the significant technical issues with the absorption processes 10–12 …”