CO2 Capture by Aqueous 3-(Methylamino)propylamine in Blend with Tertiary Amines: An NMR Analysis

Perinu, Cristina; Bernhardsen, Ida Mortensen; Svendsen, Hallvard F.; Jens, Klaus

doi:10.1016/j.egypro.2017.03.1326

Cited by 9 publications

(6 citation statements)

References 20 publications

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“…In the current study, the species identified and quantified at the equilibrium in the amine systems under investigation at the different CO 2 loadings are represented in Figure . They are in line with the typical reaction products expected by a primary/secondary diamine and a tertiary amine in an aqueous medium in the presence of CO 2 . ,, …”

Section: Results and Discussionsupporting

confidence: 87%

“…They are in line with the typical reaction products expected by a primary/ secondary diamine and a tertiary amine in an aqueous medium in the presence of CO 2 . 11,44,45 MAPA/MAPAH + /MAPA(H + ) 2 (simply reported as MAPA/ MAPA(H + ) 2 in the manuscript and in the graphs), primary MAPA carbamate (MAPACOO − ) is found in all the systems. Details on the corresponding concentrations (mol/L) can be found in the Supporting Information (Tables S9−S11).…”

Section: Resultsmentioning

confidence: 98%

“…They are in line with the typical reaction products expected by a primary/secondary diamine and a tertiary amine in an aqueous medium in the presence of CO2. 11,44,45 (Tables S9-S11).…”

Section: Chemistry Of the System And Nmr Analysismentioning

confidence: 99%

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Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

Perinu

Bernhardsen

Pinto

et al. 2019

Ind. Eng. Chem. Res.

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Based on NMR speciation, heat of absorption and pH data, the reactions occurring in aqueous MAPA (3-(Methylamino)propylamine), DEEA (2-(Diethylamino)ethanol) and their blend at various carbon dioxide (CO2) loadings were identified and discussed. At increasing CO2 loading, the basicity of the solutions decreased. In the MAPA solvent, this led to the hydrolysis of the carbamate species, which corresponded to a drop in the heat of absorption. In the blend, due to the activity of DEEA, such a drop in both pH and heat of absorption was not noticeable. In the presence of MAPA, in the early loadings DEEA had not

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Section: Results and Discussionsupporting

confidence: 87%

Section: Resultsmentioning

confidence: 98%

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Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

Perinu

Bernhardsen

Pinto

et al. 2019

Ind. Eng. Chem. Res.

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“…al. measured the pK a by potentiometric titration at 25 °C using a 0.1 mol/L aqueous a Preliminary data on the absorption process (40 °C) are presented in a conference proceeding 40. …”

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confidence: 99%

NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO₂: Influence of pK_a and Reaction Mechanisms

Perinu

Bernhardsen

Pinto

et al. 2018

Ind. Eng. Chem. Res.

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The diamine 3-(Methylamino)propylamine (MAPA) and eight tertiary amines were studied as single and blended aqueous CO2 absorbents at different concentrations and ratios to investigate the reaction mechanisms. After absorption (40 °C) and desorption (80 °C) experiments, quantitative 13 C NMR experiments were performed on each liquid sample.After absorption, the following CO2-derived species were identified and quantified:(bi)carbonate in each amine system; primary and secondary MAPA carbamate, and MAPA dicarbamate in MAPA-systems; tertiary amine carbonate in tertiary amine-systems.Concerning desorption, the main CO2-species removed was (bi)carbonate, followed in the blends by MAPA dicarbamate.Since, after CO2 absorption, the concentration of MAPA dicarbamate was negligible in single MAPA and, in the blends, mainly increased at increasing pKa of the tertiary amines, it is concluded that the tertiary amines increase the availability of MAPA species to react further with CO2. MAPA and tertiary amines appear to influence each other also for the CO2 release.

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“…It is worth noting that MEA is a commercial solution for CO2 capture. Naami [21] reported no more than 30 wt% or 5 kmol/m 3 of MEA should be used to avoid equipment corrosion as the CO2 is the only acid gas component. In fact, only 3 kmol/m 3 of MEA is usually advised for industrial uses.…”

Section: Equipmentmentioning

confidence: 99%

Analysis of mass transfer coefficient of CO2 absorbed by two-component amine mixture in a packed bed column

Limlertchareonwanit¹

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Nowadays, coal fired plant has an important role in generating energy all over the world. It affects to greenhouse gases effect (GHGs) and global warming. Carbon dioxide (CO2) is a product of coal combustion that is the amount of number one in the world. However, most of the CO2 usually remove from post-combustion process by chemical absorption which is Monoethanolamine (MEA). Anyway, MEA has a disadvantage such as low CO2 loading and corrosion. Therefore, this study needs to investigate the effect of the mass transfer for a new solvents, 2-(Methylamino)ethanol (2-MAE) and Dimethylaminoethanol (DMAE), compensate for the drawbacks of MEA to increase in mass transfer rate and performance of CO2 absorption. Effect of amine concentration by varying weight ratio from 30:0 to 0:30 wt%, liquid flow rate 5.3,10.6 and 15.9 m3/m2•h, CO2 content in gas phase 5,10 and 15 %v/v, CO2 initial loading 0.0, 0.1 and 0.2 mol/mol were investigated. From the results, increasing the ratio of 2-MAE in mixed solution increases the highest mass transfer rate and CO2 absorption performance. On the other hand, increasing the ratio of DMAE decreases the mass transfer rate. The most influencing factor for mass transfer is the flow rate of solution that improves the forward rate of reaction and reduced time for dissolved CO2. However, two-component of amine solution can improve the drawback of a single-component very well. It can be seen that a new solvent will be useful in the future.

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CO2 Capture by Aqueous 3-(Methylamino)propylamine in Blend with Tertiary Amines: An NMR Analysis

Cited by 9 publications

References 20 publications

Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO₂: Influence of pK_a and Reaction Mechanisms

Analysis of mass transfer coefficient of CO2 absorbed by two-component amine mixture in a packed bed column

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CO2 Capture by Aqueous 3-(Methylamino)propylamine in Blend with Tertiary Amines: An NMR Analysis

Cited by 9 publications

References 20 publications

Aqueous MAPA, DEEA, and Their Blend as CO2 Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

Aqueous MAPA, DEEA, and Their Blend as CO2 Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO2: Influence of pKa and Reaction Mechanisms

Analysis of mass transfer coefficient of CO2 absorbed by two-component amine mixture in a packed bed column

Contact Info

Product

Resources

About

Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

Aqueous MAPA, DEEA, and Their Blend as CO₂ Absorbents: Interrelationship between NMR Speciation, pH, and Heat of Absorption Data

NMR Speciation of Aqueous MAPA, Tertiary Amines, and Their Blends in the Presence of CO₂: Influence of pK_a and Reaction Mechanisms