Experimental and kinetic study of the catalytic desorption of CO2 from CO2-loaded monoethanolamine (MEA) and blended monoethanolamine – Methyl-diethanolamine (MEA-MDEA) solutions

Akachuku, Ananda; Osei, Priscilla; Decardi‐Nelson, Benjamin; Srisang, Wayuta; Pouryousefi, Fatima; Ibrahim, Hussameldin; Idem, Raphael

doi:10.1016/j.energy.2019.04.174

Cited by 56 publications

(37 citation statements)

References 33 publications

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“…The CO 2 absorption capacities measured for the ChCl:LvAc DESs are clearly lower than the CO 2 absorption capacity reported in the literature for aqueous solutions of MEA at 30 wt% [ 34 ], as shown in Figure 3 . This might be due to the fact that the CO 2 absorption mechanism is different in both cases: CO 2 absorption in MEA solutions is a combination of chemisorption and physisorption [ 35 , 36 ], whereas the CO 2 absorption in the DESs studied in this work is limited to physisorption only [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

Aboshatta

Magueijo

2021

Molecules

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Amine absorption (or amine scrubbing) is currently the most established method for CO2 capture; however, it has environmental shortcomings and is energy-intensive. Deep eutectic solvents (DESs) are an interesting alternative to conventional amines. Due to their biodegradability, lower toxicity and lower prices, DESs are considered to be “more benign” absorbents for CO2 capture than ionic liquids. In this work, the CO2 absorption capacity of choline-chloride/levulinic-acid-based (ChCl:LvAc) DESs was measured at different temperatures, pressures and stirring speeds using a vapour–liquid equilibrium rig. DES regeneration was performed using a heat treatment method. The DES compositions studied had ChCl:LvAc molar ratios of 1:2 and 1:3 and water contents of 0, 2.5 and 5 mol%. The experimental results showed that the CO2 absorption capacity of the ChCl:LvAc DESs is strongly affected by the operating pressure and stirring speed, moderately affected by the temperature and minimally affected by the hydrogen bond acceptor (HBA):hydrogen bond donator (HBD) molar ratio as well as water content. Thermodynamic properties for CO2 absorption were calculated from the experimental data. The regeneration of the DESs was performed at different temperatures, with the optimal regeneration temperature estimated to be 80 °C. The DESs exhibited good recyclability and moderate CO2/N2 selectivity.

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Section: Resultsmentioning

confidence: 99%

A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

Aboshatta

Magueijo

2021

Molecules

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“…The NAC bond stretches and, eventually, breaks, which causes the zwitterion to become MEA and CO 2 . At high regeneration temperatures, the CO 2 solubility in the aqueous solution is low and the CO 2 will then transfer to the gas phase [81,[84][85][86]. Therefore, this also explains why when more HZSM-5 catalysts are present, the concentrations of available protons would increase and, therefore, allow MEACOO-to react with the protons at an increased rate.…”

Section: Limited Number Of Protons Availablementioning

confidence: 99%

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Rozaiddin

Lau

2022

Sustainability

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The employment of nanoparticles in solvents is a promising method to reduce the energy consumption during solvent regeneration. Numerous experimental and theoretical studies have been conducted to investigate the remarkable enhancement of nanoparticles. Yet, there are limited reviews on the mechanistic role of nanoparticles in enhancing the solvent regeneration performance. This review addresses the recent development on the employment of various nanoparticles, which include metals oxides, zeolites and mesoporous silicas, to enhance the mass and heat transfer, which subsequently minimize the solvent regeneration energy. The enhancement mechanisms of the nanoparticles are elaborated based on their physical and chemical effects, with a comprehensive comparison on each nanoparticle along with its enhancement ratio. This review also provides the criteria for selecting or synthesizing nanoparticles that can provide a high regeneration enhancement ratio. Furthermore, the future research prospects for the employment of nanoparticles in solvent regeneration are also recommended.

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“…Nonetheless, there remain some challenges to such absorbents like low vapor pressure, amine solvent degradation and equipment corrosion. However, the high cost of energy consumption in the solvent regeneration section is known as the main problem in the industrial usage of amine solvents because of strong chemical reactions (Akachuku et al 2019). Therefore, widespread studies have been performed to introduce new approaches for the reduction of energy consumption in amine stripping. )…”

Section: Introductionmentioning

confidence: 99%

Intensification of CO2 absorption and desorption by metallic and non-metallic nanoparticles in bubble columns

Zarei

Keshavarz

2022

Preprint

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In this study, four different metallic and non-metallic nanoparticles including CuO, Fe3O4, ZnO and SiO2 were employed to improve CO2 absorption and desorption in MDEA-based nanofluid. CO2 absorption experiment with various nanofluids was done in a bubble column reactor at ambient temperature. Also, CO2 stripping experiments for all nanofluids were done at 60 and 70 oC. The influence of nanoparticles type, nanoparticle concentration, and the stability of nanoparticles were studied on both CO2 absorption and stripping. The obtained results revealed that Fe3O4 nanoparticles at 0.01 wt.% concentration had the best influence on CO2 absorption and it improved the CO2 loading up to 36%. Also, CO2 stripping experiments for all nanofluids were done at 60 and 70 oC. The desorption experiments illustrated that metallic nanoparticles can be more efficient in improving CO2 desorption. In CO2 desorption, the CuO nanoparticles at 0.05 wt.% had higher efficiency, and enhanced CO2 concentration at outlet gas phase up to 44.2 vol.% at 70 oC.

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Experimental and kinetic study of the catalytic desorption of CO2 from CO2-loaded monoethanolamine (MEA) and blended monoethanolamine – Methyl-diethanolamine (MEA-MDEA) solutions

Cited by 56 publications

References 33 publications

A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Intensification of CO2 absorption and desorption by metallic and non-metallic nanoparticles in bubble columns

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