Experimental Studies on the Effect of Tertiary Amine Promoters in Aqueous Monoethanolamine (MEA) Solutions on the Absorption/Stripping Performances in Post-combustion CO₂ Capture

Abstract

The absorption/desorption performance of carbon dioxide (CO 2 ) in aqueous 5 M monoethanolamine (MEA) solutions in the presence of various solution regeneration promoters was comprehensively investigated using a multiple rapid screening method. The promoters considered were N-methyldiethanolamine (MDEA), N,N-dimethylethanolamine (DMEA),The molar concentration of these promoters added into 5 M MEA was set to 1 mol/L. At the atmospheric pressure, the absorption and stripping experiments were carried out at 313.15 and 353.15 K, respectively. Especially, the CO 2 partial pressure was controlled at constant 15 kPa for absorption experiments. In addition, the equilibrium solubility of CO 2 was also determined in order to evaluate the driving force of each amine system. The results showed that the highest CO 2 equilibrium solubility of 0.5548 mol CO 2 /mol amine was obtained by MEA/1DEA2P, whereas both the fastest absorption and regeneration rates were achieved for aqueous blended MEA/1DMA2P solution which made MEA/1DMA2P to exhibit the highest CO 2 cyclic capacity of 1.6710 mol CO 2 /L.

Investigation of Biocatalytic Absorption and Ultrasound-Assisted Desorption Performance of CO2 Capture

“…The CO 2 absorption capacities for the AEPD: 1-hexanol systems are much higher than the theoretical value of 0.5 mol CO 2 /mol MEA. [44]. As per the literature, the CO 2 loading of tertiary amines is close to 0.9 mol CO 2 /mol amine, except for MDEA [44].…”

“…[44]. As per the literature, the CO 2 loading of tertiary amines is close to 0.9 mol CO 2 /mol amine, except for MDEA [44]. The CO 2 loading in aqueous MDEA allowed for the capture of 0.63 mol CO 2 /mol MDEA, as reported by Jaafari et al, and 0.52 mol CO 2 /mol MDEA, as reported by Hadri et al [6,29].…”

Improvement of CO2 Absorption/Desorption Rate Using New Nano-Fluid

“…Therefore, the significant danger to the climatic is increasing [1,2]. Several technologies were applied to capture CO2 effectively such as: physical and chemical absorption, spread through organic and inorganic membranes, adsorption and cryogenic process [1][2][3]. Commercially, the most method used to capture CO2 is chemical absorption using alkanolamines aqueous solutions [3,4].…”

“…Several technologies were applied to capture CO2 effectively such as: physical and chemical absorption, spread through organic and inorganic membranes, adsorption and cryogenic process [1][2][3]. Commercially, the most method used to capture CO2 is chemical absorption using alkanolamines aqueous solutions [3,4]. Capturing CO2 by alkanolamines requires various alkanolamines aqueous solutions like monoethanolamine (MEA), triethanolamine (TEA), Diethanolamine (DEA) or 2amino-2-methyl-1-propanol (AMP).…”

New Experimental Data on Equilibrium CO2 Loading into Aqueous 3-Dimethyl Amino-1-propanol and 1,5-Diamino-2-methylpentane Blend: Empirical Model and CO2 Absorption Enthalpy

“…The different parameters and conditions at atmospheric pressure utilized were the activator weight fraction in the amine blend (3-DMA-1-P + 1,5-DA-2-MP) from 0.05 to 0.2 (0.05, 0.10, 0.15, and 0.20), total concentration of solution from 10 to 30 wt % (10, 15, 20, 25,, and 30 wt %), temperature from 293.15 to 323.15 K (293.15, 303.15, 313.15 and 323.15 K), and CO 2 partial pressure from 10.13 to 25.33 kPa (10.13, 15.2, 20.27, and 25.33 kPa) for the 3-DMA-1-P + 1,5-DA-2-MP aqueous blend in this study. To validate the lab-scale experimental setup, CO 2 loading for MEA was measured at 313.15 K and at different partial pressures of CO 2 ( p CO 2 ) (12.8, 15.20, and 20.27 kPa) and compared with available literature with the same operating condition. − Results are shown in Table . Average relative deviation % and absolute deviation % between experimental CO 2 loading (α exp ) data and literature data (α lit ) were calculated and are reported in Table .…”