A simplified semi-empirical model for modeling of CO2 solubilities in aqueous MDEA and MEA solutions

Guo, Lianghui; Wang, Bohong; Wang, Yi; Zhang, Lei; Wang, Nianrong; Chen, Youwang

doi:10.1016/j.fluid.2021.113352

Cited by 5 publications

(2 citation statements)

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“…In addition, the utilization of amine solvents is subjected to a few constraints, such as high vapor loss, thermal degradation, very toxic, corrosive, and high energy consumption for regeneration [8,[19][20][21][22]. In the past decades, monoethanolamine (MEA) dominated the industrial CO 2 absorption process due to its high reaction rates and low cost [23]. Nevertheless, the maximum CO 2 loading capacity of MEA is limited to 0.5 mol CO 2 /mol amine due to the formation of stable carbamates during the reaction.…”

Section: Introductionmentioning

confidence: 99%

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

et al. 2023

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The operational and economic constraints suffered by amine solvents for CO2 removal have motivated the research on an alternative solvent with better performance and cost-effectiveness. Amino acid salt (AAS) has been identified as an interesting green solvent, an alternative to commercial amine solvents. The present work evaluated the physicochemical and CO2-solubility properties of potassium L-cysteine (K-CYS), a naturally occurring amino-acid-based solvent for CO2 removal from natural gas. Its physicochemical properties, including density, viscosity, and refractive index, were measured at different temperatures ranging between 298.15 and 333.15 K and a concentration range of 5 to 30 wt.%. Based on the experiment, all properties were found to decrease with increasing temperature and increase with increasing concentration. The experiments also demonstrated a significant reduction of CO2 loading from 2.4190 to 1.1802 mol of CO2/mol of K-CYS with increasing solvent concentration from 10 to 30 wt% at 313.15 K and 20 bar (g).

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Section: Introductionmentioning

confidence: 99%

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

et al. 2023

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“…Ethanolamine (MEA) is certainly the most studied and used amine and is considered the benchmark for every sorbent-based CCS process. − More recently, benzylamine (BZA), another primary amine, has also aroused the interest of numerous research groups to be used both individually and mixed with other amines. ,− Many studies have shown that BZA and MEA have similar absorption capacity, carbamate stability, comparable vapor pressure, and boiling point. , Compared to MEA, BZA exhibits higher cyclic capacity, lower viscosity and lower heat capacity, faster absorption rate, and a better ability to promote mass transfer in blends . Furthermore, BZA is less subject to oxidative degradation than MEA and has a less corrosive behavior for the equipment .…”

Section: Introductionmentioning

confidence: 99%

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis

et al. 2022

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Aiming at formulating efficient sorbents for carbon capture and separation (CCS) processes, in this work, we evaluated the CO2 capture performance of aqueous blends of two primary amines, namely, ethanolamine (MEA), the benchmark for any capture process, combined with benzylamine (BZA), which has intriguing characteristics for industrial use, such as low corrosivity and good resistance to thermal and oxidative degradation. The CO2 loading, the CO2 absorption rate, and the CO2 heat of absorption were determined at 313 K for three different formulations of aqueous BZA/MEA blends, all with the same overall amine concentration (6 M) but with different amine molar ratios (1/2, 1/1, 2/1) by treating a gas mixture containing 15% CO2 (by volume) mimicking a fossil-derived flue gas. Furthermore, through an accurate 13C NMR study, the species present in solution during the CO2 absorption process were identified and quantified to understand the capture mechanism and to evaluate the interactions of the two primary amines when present together in different molar ratios. As a result, the three tested blends show similar high CO2 absorption rates, and their final loading values decrease in the order BZA/MEA 1/2 > BZA/MEA 1/1 > BZA/MEA 2/1, suggesting that a greater relative amount of MEA in the blend is advantageous to achieve a relatively higher CO2 loading. The 13C NMR analysis confirmed that the greater alkalinity of MEA leads to a greater formation of bicarbonate in solution and consequently higher loading. Finally, the CO2 absorption heat of all tested mixtures, measured using a high-precision microcalorimeter, was found to be comparable, if not even higher, to that of each individual amine.

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An Empirical Test of Logit Modeling on Investors’ Trading Behavior

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Liu

et al. 2022

Cyber Security Intelligence and Analytics

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A simplified semi-empirical model for modeling of CO2 solubilities in aqueous MDEA and MEA solutions

Cited by 5 publications

References 49 publications

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis

An Empirical Test of Logit Modeling on Investors’ Trading Behavior

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A simplified semi-empirical model for modeling of CO2 solubilities in aqueous MDEA and MEA solutions

Cited by 5 publications

References 49 publications

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity

Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO2 Capture through 13C NMR Speciation and Heat of CO2 Absorption Analysis

An Empirical Test of Logit Modeling on Investors’ Trading Behavior

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Product

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Investigating the Performance of Ethanolamine and Benzylamine Blends as Promising Sorbents for Postcombustion CO₂ Capture through ¹³C NMR Speciation and Heat of CO₂ Absorption Analysis