Simulation of Aqueous Blend of Monoethanolamine and Glycerol for Carbon Dioxide Capture from Flue Gas

Abstract

This study investigated CO2 capture from flue gas by using glycerol as solvent. Absorption was simulated using a rate-based model with three cases under similar operating conditions. CO2 separation was first simulated using ENRTL-RK thermodynamic model with monoethanolamine (MEA) as solvent. CO2 absorption was then simulated using NRTL-RK thermodynamic model with glycerol solvent, and then an aqueous mixture of MEA/glycerol was also simulated using ENRTL-RK thermodynamic model. Simulation results confirm that glycerol can be used as promoter with MEA solvent to enhance CO2 capture. The optimal glycerol concentration for CO2 absorption is 10–40 wt %, in which 10 wt % glycerol exhibits the lowest CO2 concentration in the outlet gas from the absorber. The CO2 removal efficiency increases from 62.24% for 10 wt % MEA aqueous solution to 64.33% for the mixture of 10 wt % MEA–10 wt % glycerol aqueous solution. The CO2 removal efficiency for 10 wt % glycerol aqueous solution is 27.31%.

Hydrogenolysis of Glycerol to Propylene Glycol: Energy, Tech-Economic, and Environmental Studies

“…Redlich-Kwong model was used to determine gas composition, while NRTL method was used to describe liquid phase (Rocha et al, 2014;Li et al, 2016;Liu et al, 2018). Since reaction and separation units involve gas-liquid and liquid-liquid multiphase system in this work, NRTL (nonrandom two liquid) model is supposed to be well predictive in determining the actual composition of various components (Poozesh et al, 2015;Li et al, 2016;Mirzaei et al, 2016;Xie et al, 2016;Hernández et al, 2018;Ma et al, 2018;Ma et al, 2019;Qin et al, 2019;Chen et al, 2020). Redlich-Kwong and NRTL models are only suitable for polar and gas-liquid phase systems.…”

CO2 Absorption/Desorption in Aqueous Single and Novel Hybrid Solvents of Glycerol and Monoethanolamine in a Pilot-Scale Packed Bed Column

“…These concentrations were selected on the basis of the discussions in our previous work. 32 Fifty liters of each aqueous solution was prepared on the basis of volume concentrations using the distilled water. Fourteen experimental runs were performed in the absorption/desorption unit at five different gas flow rates (1.4, 1.7, 2.9, 3.3, and 3.9 L/min) using aqueous solutions of MEA, glycerol, and MEA-glycerol.…”

Proceedings of the 8th International Conference on Renewable Electrical Power Sources

“…Materials for capturing CO2 need to have a high and selective absorption. There are many proposed materials for this purpose, such as monoethanolamine, porous organic polymers, carbon materials, zeolites, metal-organic frameworks [26,27,28,29]. However, these materials have many weaknesses, such are low selectivity and high cost.…”