Impact of speciation on CO2 capture performance using blended absorbent containing ammonia, triethanolamine and 2-amino-2-methyl-1-propanol

Song, Hao-Yang; Jeon, Soo-Bin; Jang, Seyong; Lee, Sang-Sup; Kang, Seong-Kuy; Oh, Kwang–Joong

doi:10.1007/s11814-014-0030-6

Cited by 3 publications

(3 citation statements)

References 42 publications

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“…Consequently, there is more carbamate produced in MEA–MDEA–CO 2 –H 2 O system than in MEA–1DMA2P–CO 2 –H 2 O system. It should be noted that less carbamate in the loaded amine solution leads to less energy consumption in solvent regeneration . From Figure , it can be concluded that the absorbent mixture of MEA–1DMA2P consumes less energy than MEA–MDEA in solvent regeneration.…”

Section: Resultsmentioning

confidence: 92%

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Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Zhang¹,

Liu²,

Rongwong³

et al. 2016

Ind. Eng. Chem. Res.

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The formation of bicarbonate ions in an amine solution during CO 2 absorption results in lowering the heat duty for amine solvent regeneration in the CO 2 capture process because bicarbonate breakdown needs the lowest energy input to release CO 2 . In this study, bicarbonate formation was conducted for two mixed solvents consisting of tertiary amines (1DMA2P (1 M) or MDEA (1 M)) blended with MEA in order to determine both formation rate and capacity of bicarbonate ions as compared to MEA alone. The amines and concentrations used in the study were MEA (5 M), MEA−MDEA (5:1 molar ratio, 6 M total), and MEA−1DMA2P (5:1 molar ratio, 6 M total) at various CO 2 loadings. The formation of bicarbonate ions was evaluated using 13 C NMR technique at 293.15 K. The results show that for the single tertiary amine system higher concentrations of bicarbonate ions were formed for MDEA than for 1DMA2P for the same CO 2 loading. The results for the blended amine systems showed that bicarbonate ions were generated at CO 2 loadings lower with MEA alone than with MEA−1DMA2P generating bicarbonate ions at a CO 2 loading (0.34 mol CO 2 /mol amine) lower than that with MEA−MDEA (0.38 mol CO 2 /mol amine). Thus, as an additive in MEA, 1DMA2P has a better potential than does MDEA to generate bicarbonate ions at a leaner CO 2 loading with the attendant lowering of the regeneration energy.

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Section: Resultsmentioning

confidence: 92%

“…It should be noted that less carbamate in the loaded amine solution leads to less energy consumption in solvent regeneration. 36 From Figure 4, it can be concluded that the absorbent mixture of MEA−1DMA2P consumes less energy than MEA−MDEA in solvent regeneration.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 97%

Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Zhang¹,

Liu²,

Rongwong³

et al. 2016

Ind. Eng. Chem. Res.

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“…Commercial amines for the CCS technology can be classified into four types: (i) primary amine: monoethanolamine (MEA); (ii) secondary amine: diisopropanolamine (DIPA) and diethanolamine (DEA); (iii) tertiary amine: methyldiethanolamine (MDEA), triethanolamine (TEA), and triethylamine (TEA); and (iv) steric hindrance amine: 2-amino-2-methyl propanol (AMP). MEA is the most widely used amine because of its high reactivity and reasonable cost. − AMP has also attracted attention owing to its high CO 2 absorption capacity and chemical stability. ,, Recently, CO 2 absorption solvents have been developed by mixing two or more amines to take advantage of the favorable properties of each amine. ,− For instance, blended amine solutions (1) can utilize both physical and chemical properties, (2) can improve equilibrium amounts and kinetic characteristics, and (3) can control heat of absorption, pH, corrosion, and solvent degradation. , In a previous study of Mahmoodi et al, MEA was used as an activator to enhance the CO 2 solubility of AMP. In this study, the characteristics of CO 2 absorption in a blended aqueous solution of MEA and AMP were examined using experiments and thermodynamic models.…”

Section: Introductionmentioning

confidence: 99%

Effect of Blending Ratio and Temperature on CO₂ Solubility in Blended Aqueous Solution of Monoethanolamine and 2-Amino-2-methyl-propanol: Experimental and Modeling Study Using the Electrolyte Nonrandom Two-Liquid Model

et al. 2020

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This paper reports the newly measured experimental data for CO2 solubility in a blended aqueous solution of monoethanolamine (MEA) and 2-amino-2-methyl-propanol (AMP) at different amine mixing ratios (MEA/AMP/H2O = 9:21:70, 15:15:70, and 21:9:70 wt %) and working temperatures (323.15, 373.15, and 383.15 K). The successive substitution method was used for calculating the mole fractions of all molecules (four molecules) and electrolytes (three cations and four anions) from the equilibrium along with the material and charge balance equations (11 equations). The electrolyte nonrandom two-liquid (e-NRTL) model was used to investigate nonideality in the liquid phase. Using the abovementioned thermodynamic models, the partial pressures of CO2 in the gas phase, mole fractions of all components in the liquid phase, pH variations, heats of absorption, and cyclic capacities of CO2 according to the absorption/desorption temperature and the blending ratio of MEA/AMP were estimated.

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Thermodynamic models applied to CO₂absorption modelling

Borhani

Nabavi

Hanak

et al. 2020

Reviews in Chemical Engineering

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AbstractCarbon capture, utilisation, and storage (CCUS) is considered as the least cost-intensive option towards achieving the emission reduction target by 2050. One of the important technologies to remove CO2 from different gas streams is solvent-based CO2 capture. Modelling and simulation of solvent-based CO2 capture processes have been attracting a lot of attention in recent years. Thermodynamic models play a vital role in these modelling and simulation studies. Hence, this study critically reviews the thermodynamic models applied in the modelling of solvent-based CO2 capture systems over the past years, to provide a guideline for the selection of the optimum models for future studies. These models have wide applications in two main areas: equilibrium modelling [vapour-liquid equilibrium (VLE) (physical) and speciation equilibrium (chemical)], and calculation of some thermodynamic properties. VLE and speciation modelling methods are classified rigorously. VLE modelling methods are classified as homogeneous, heterogeneous, and empirical, and speciation modelling methods are classified as iterative (which could be stoichiometric and non-stoichiometric) and non-iterative. Thermodynamic models are categorised into three key families: activity-coefficient based, equation of state based, and quantum mechanical based. Theory and concepts of different thermodynamic models are presented. Some selected studies that used each family of thermodynamic models are reviewed.

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Impact of speciation on CO2 capture performance using blended absorbent containing ammonia, triethanolamine and 2-amino-2-methyl-1-propanol

Cited by 3 publications

References 42 publications

Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Effect of Blending Ratio and Temperature on CO₂ Solubility in Blended Aqueous Solution of Monoethanolamine and 2-Amino-2-methyl-propanol: Experimental and Modeling Study Using the Electrolyte Nonrandom Two-Liquid Model

Thermodynamic models applied to CO₂absorption modelling

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Impact of speciation on CO2 capture performance using blended absorbent containing ammonia, triethanolamine and 2-amino-2-methyl-1-propanol

Cited by 3 publications

References 42 publications

Study of Formation of Bicarbonate Ions in CO2-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Study of Formation of Bicarbonate Ions in CO2-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Effect of Blending Ratio and Temperature on CO2 Solubility in Blended Aqueous Solution of Monoethanolamine and 2-Amino-2-methyl-propanol: Experimental and Modeling Study Using the Electrolyte Nonrandom Two-Liquid Model

Thermodynamic models applied to CO2absorption modelling

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Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Study of Formation of Bicarbonate Ions in CO₂-Loaded Aqueous Single 1DMA2P and MDEA Tertiary Amines and Blended MEA–1DMA2P and MEA–MDEA Amines for Low Heat of Regeneration

Effect of Blending Ratio and Temperature on CO₂ Solubility in Blended Aqueous Solution of Monoethanolamine and 2-Amino-2-methyl-propanol: Experimental and Modeling Study Using the Electrolyte Nonrandom Two-Liquid Model

Thermodynamic models applied to CO₂absorption modelling