An investigation of the role of N-methyl-diethanolamine in non-aqueous solution for CO2 capture process using 13C NMR spectroscopy

Chen, Siming; Chen, Shaoyun; Zhang, Yongchun; Chai, Huanhuan; Qin, Liang; Gong, Yutong

doi:10.1016/j.ijggc.2015.05.011

Cited by 26 publications

(16 citation statements)

References 41 publications

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“…See Figure for selected optimized geometries of molecular complexes and single molecules. The results are in general agreement with the available literature data. , .…”

Section: Resultssupporting

confidence: 91%

“…Our computational thermodynamic potentials are in concordance with the presented experimental data for gas capture and literature results. 43,45 Indeed, MDEA absorbs larger quantities of CO 2 (Figure 7). We also considered capture of the second CO 2 molecule per amine molecule, since the carboxyl group of the carbamate anion may be expected to exhibit certain affinity for H 2 CO 3 and hydrated CO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The results are in general agreement with the available literature data. 43,45 . ] participates in the gas capture, even though the amount of amine molecules is enough to capture all CO 2 molecules.…”

Section: Resultsmentioning

confidence: 99%

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Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Bernard¹,

Vecchia²,

Ligabue³

et al. 2016

J. Chem. Eng. Data

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The mixtures of aqueous amines and ionic liquids (ILs) are considered as potential solvents for CO 2 capture. We report corrosion and CO 2 absorption behavior of the mixed IL−amine solutions. The absorption tests were performed at 318.15 K under 0.1−2.7 MPa. The corrosion tests were carried out at 318.15 K under 2.7 MPa. Addition of [bmim][BF 4 ] in aqueous alkanolamine solutions reduces corrosion rate for MEA by up to 72%. The CO 2 absorption capacity in the mixtures falls between those of aqueous MDEA and pure IL. These results allow to choose the working pressure range as a function of other parameters, such as gas pressure and mixture viscosity. According to the simulations, [bmim][BF 4 ] participates in the gas capture through H-bonding, although the number of amine molecules is enough to capture all supplied CO 2 molecules. The equilibrium of the chemisorption reaction is, therefore, modified upon the stepwise IL addition. An ideal IL content for preventing corrosion is 10% w/w.

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“…See Figure for selected optimized geometries of molecular complexes and single molecules. The results are in general agreement with the available literature data. , .…”

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Bernard¹,

Vecchia²,

Ligabue³

et al. 2016

J. Chem. Eng. Data

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“…Moreover, some researchers tried to elucidate the reaction products of CO 2 capture in nonaqueous solutions. Some research detected the saturated N -methyldiethanolamine (MDEA)/EMEA/ethanol solution by 13 C NMR and 1 H– 13 C HMBC spectroscopy and confirmed that carbamate of EMEACO 2 – and alkyl carbonate of C 2 H 5 OCO 2 – were generated after CO 2 absorption . The reaction products of carbamate and carbonate were also found in the saturated triethylene tetramine (TETA)/ethanol solution .…”

Section: Introductionmentioning

confidence: 97%

“…Some research detected the saturated N-methyldiethanolamine (MDEA)/EMEA/ethanol solution by 13 C NMR and 1 H− 13 C HMBC spectroscopy and confirmed that carbamate of EMEACO 2 − and alkyl carbonate of C 2 H 5 OCO 2 − were generated after CO 2 absorption. 15 The reaction products of carbamate and carbonate were also found in the saturated triethylene tetramine (TETA)/ethanol solution. 16 Although some studies have attempted to elucidate the mechanism of CO 2 capture into organic amine nonaqueous solutions, most studies merely detected the components of the solution before and after absorption, and the detailed intermediate process was not explained sufficiently well.…”

Section: ■ Introductionmentioning

confidence: 99%

Performance and Mechanisms of Triethylene Tetramine (TETA) and 2-Amino-2-methyl-1-propanol (AMP) in Aqueous and Nonaqueous Solutions for CO₂ Capture

Liu

Jing

Zhou

et al. 2017

ACS Sustainable Chem. Eng.

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Nonaqueous amines are currently being explored for energy-efficient postcombustion CO2 capture, but the absorption capacity and regeneration efficiency of most absorbents still need to be further improved. In this work, a mixture of triethylene tetramine (TETA) and 2-amino-2-methyl-1-propanol (AMP) dissolved in ethanol was chosen as a nonaqueous absorbent for CO2 capture and performed with high absorption loading and regeneration efficiency. In addition, the changes of the components during the absorption–desorption process and reaction mechanisms of nonaqueous absorbents were explored by 13C NMR spectroscopy and compared with those of aqueous absorbents. The results showed that TETA/AMP/ethanol had higher absorption loading and regeneration efficiency (3.71 mol kg–1, 95.4%) after the fifth regeneration cycle than TETA/AMP/water (3.54 mol kg–1, 38.8%) when the amine mass concentration was 40 wt %. CO2 capture by TETA/AMP aqueous and nonaqueous solutions proceeded by two different mechanisms. Polycarbamate and alkyl carbonate of C2H5OCO2 – formed in the TETA/AMP/ethanol solution, while polycarbamates and HCO3 –/CO3 2– formed in the TETA/AMP/water solution. Moreover, the regeneration efficiency of the nonaqueous solution was higher than that of the aqueous solution because the reaction products were easily decomposed in ethanol, and the regeneration consumption of the organic solvent was lower than that of water.

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Development of MEA-based CO 2 phase change absorbent

et al. 2017

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An investigation of the role of N-methyl-diethanolamine in non-aqueous solution for CO2 capture process using 13C NMR spectroscopy

Cited by 26 publications

References 41 publications

Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Performance and Mechanisms of Triethylene Tetramine (TETA) and 2-Amino-2-methyl-1-propanol (AMP) in Aqueous and Nonaqueous Solutions for CO₂ Capture

Development of MEA-based CO 2 phase change absorbent

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An investigation of the role of N-methyl-diethanolamine in non-aqueous solution for CO2 capture process using 13C NMR spectroscopy

Cited by 26 publications

References 41 publications

Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Anticorrosion Protection by Amine–Ionic Liquid Mixtures: Experiments and Simulations

Performance and Mechanisms of Triethylene Tetramine (TETA) and 2-Amino-2-methyl-1-propanol (AMP) in Aqueous and Nonaqueous Solutions for CO2 Capture

Development of MEA-based CO 2 phase change absorbent

Contact Info

Product

Resources

About

Performance and Mechanisms of Triethylene Tetramine (TETA) and 2-Amino-2-methyl-1-propanol (AMP) in Aqueous and Nonaqueous Solutions for CO₂ Capture