Improvement in CO2 absorption and reduction of absorbent loss in aqueous NH3/triethanolamine/2-amino-2-methyl-1-propanol blends

Kang, Min‐Kyoung; Jeon, Soo-Bin; Oh, Kwang–Joong

doi:10.1007/s11814-013-0072-1

Cited by 15 publications

(4 citation statements)

References 22 publications

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“…12 MEA and MDEA have been widely used in commercial processes, and studies have shown that the blend of MEA with tertiary amines leads to a reduction of energy requirement and an increase in CO 2 removal efficiency 13,14 as well as in absorption ability and absorption rate. 15 The 5 M solution of MEA in the amine mixture was chosen for this study because it has been used widely in industrial plants. When the tertiary amine reacts with CO 2 , it acts as a base that catalyzes the hydration of CO 2 to produce bicarbonate.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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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“…Of these, alkanolamines and amino acid salts can be prepared from biomass . Although CO 2 absorption performance of commercial alkanolamines and amino acid salts including the reaction thermodynamics and kinetics have extensively been reviewed, few reports on the CO 2 absorption performance of renewable alkanolamines and amino acid salts were found in the open literature. Thus, only the preparation routes and the treatment of the renewable organic absorbents are focused upon in this section.…”

Section: Inorganic Renewable Absorbentsmentioning

confidence: 99%

“…Promising CO 2 absorbents including amino acid salts, choline‐based deep eutectic solvents, blended amines, ionic liquid, and biphasic CO 2 absorbents have been extensively reviewed recently. These reviews tend towards the summarization of CO 2 reaction mechanisms and assessment of absorbent properties for industrial applications, such as cyclic capacity, absorption rate, and process stability.…”

Section: Introductionmentioning

confidence: 99%

Renewable absorbents for CO₂ capture: from biomass to nature

Shi

Liang

et al. 2019

Greenhouse Gases

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The chemical absorption process for carbon dioxide (CO2) capture is a promising method to reduce greenhouse gas emissions in the energy industry. Worldwide applications of the CO2 chemical absorption process will consume plenty of chemical absorbents and have hazardous impacts on the environment. The development of renewable absorbents from biomass can not only fill the gap of absorbent production, but also provide a novel green approach to recycle the used absorbents into nature without additional pollution. In this review, we summarized several renewable absorbents available from biomass such as biomass ash slurries, alkanolamines, aqueous ammonia, and amino acid salts. The preparations, CO2 absorption capacities, advanced treatments, and applications of the renewable absorbents were also reviewed. Moreover, the advantages and challenges in the preparation of the renewable absorbents were discussed, as well as their CO2 absorption performance improvement. Finally, future research avenues into degradation and utilization of renewable absorbents in nature were suggested. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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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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Improvement in CO2 absorption and reduction of absorbent loss in aqueous NH3/triethanolamine/2-amino-2-methyl-1-propanol blends

Cited by 15 publications

References 22 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

Renewable absorbents for CO₂ capture: from biomass to nature

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

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Improvement in CO2 absorption and reduction of absorbent loss in aqueous NH3/triethanolamine/2-amino-2-methyl-1-propanol blends

Cited by 15 publications

References 22 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

Renewable absorbents for CO2 capture: from biomass to nature

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

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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

Renewable absorbents for CO₂ capture: from biomass to nature

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