Solubility of Carbon Dioxide in Aqueous Solutions of Three Secondary Amines: 2-(Butylamino)ethanol, 2-(Isopropylamino)ethanol, and 2-(Ethylamino)ethanol Secondary Alkanolamine Solutions

Hwang, Sung June; Kim, Junghwan; Kim, Huiyong; Lee, Kwang Soon

doi:10.1021/acs.jced.7b00364

Cited by 45 publications

(10 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In comparison with MEA 30 wt % aqueous solution, the absorption heat of EAE is smaller due to less formation of carbamate. 3 Therefore, the overall absorption heat of EAE is smaller than that of MEA aqueous solution in our study. The overall absorption heat of single aqueous amines decreases in the order primary > secondary.…”

Section: Comentioning

confidence: 53%

See 1 more Smart Citation

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Tran

Ando

Yamaguchi

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

For three groups of systemshomogeneous, liquid–liquid, and solid–liquidabsorption heats of carbon dioxide capture by amine solutions were determined with continuous calorimetry. In the case of a phase-separation solvent, the heat of phase separation is added to conventional absorption heat, and the loading range of heat of phase separation is important in process design. With the merits of continuous measurement, the phase-change loading points were obtained in liquid–liquid and solid–liquid phase-separation systems as the heat release of carbon dioxide products to achieve a more stable state. The loading points where a leap in absorption heat appears coincide with those where the turbidity in solvents changes, which was confirmed by ocular inspection in both systems. In liquid–liquid systems, the presence of water in 2-(ethylamino)ethanol:diethylene glycol diethyl ether:water contributes to the decrease in absorption heat. Even though the formation of bicarbonate is minor even in solvent with water, the increase in its formation contributes to this decrease in absorption heat because of its lower formation heat as compared to that of carbamate. In solid–liquid systems, a significant increase in absorption heat is attributed to the crystallization energy of carbonate salt emitted on the breakdown of the supersaturation.

show abstract

Section: Comentioning

confidence: 53%

“…From the solubility of CO 2 in solution, differentiation of partial pressure of CO 2 over amine solution with respect to temperature gives the absorption heat via the Gibbs–Helmholtz equation: , …”

Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Tran

Ando

Yamaguchi

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Some secondary alkanolamines with low heat of absorption have attracted special attention. Recently, extensive studies on the absorption behavior and performance, − physical properties, − and kinetics − have been performed on solvent-free and aqueous secondary alkanolamines for CO 2 capture. In these studies, single-component secondary amines presented high absorption efficiency and low regeneration temperature.…”

Section: Introductionmentioning

confidence: 99%

Energy-Efficient CO₂ Capture Using Nonaqueous Absorbents of Secondary Alkanolamines with a 2-Butoxyethanol Cosolvent

Ping

Dong

Shen

2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Nonaqueous amine-based absorbents by replacing water with organic solvents have potential advantages of low energy penalty and reduced amine degradation for CO 2 capture. An advanced nonaqueous system of 2-(butylamino)ethanol (BAE) with 2-butoxyethanol (EGBE) was proposed for low-energy consumption CO 2 capture. EGBE was selected as a green cosolvent because of its superior properties over the reported organics and water. A comprehensive study on CO 2 capture performance has been performed for secondary alkanolamine nonaqueous systems such as 2-(methylamino)ethanol (MAE), 2-(ethylamino)ethanol (EAE), and BAE and their aqueous counterparts. Product species in CO 2 -loaded solutions were identified by 13 C nuclear magnetic resonance and Fourier transform infrared spectroscopy. Regeneration energy consumption was also evaluated using a modified method and compared with that of conventional aqueous monoethanolamine (MEA). Results demonstrated that the aqueous 5.0 M secondary amine absorbents had higher absorption capacity and larger cyclic capacity than their nonaqueous counterparts. The desorption efficiency for both systems was in a descending order: BAE > EAE > MAE. Surprisingly, the cyclic capacity of aqueous and nonaqueous BAE systems was about 180 and 100% higher than that of aqueous MEA, respectively. The underlying reasons were also discussed. CO 2 can react with these amines, forming unstable carbamates and protonated amines in the EGBE solvent, whereas it forms bicarbonate species in addition to ionic couples in aqueous solutions. The regeneration heat duty of nonaqueous EGBE-based secondary amine absorbents was about 45−55% lower than that of aqueous MEA (3.82 MJ kg −1 CO 2 ). In addition, the feasibility of low-temperature desorption makes the BAE/EGBE absorbent a compelling solution for energy-saving CO 2 capture technology using low-grade industrial waste heat.

show abstract

“…The massive emissions of carbon dioxide (CO 2 ) have generated serious atmospheric environment issues such as global warming and climate change. − Alkanolamine-based absorption technology is one of the promising methods for postcombustion carbon capture owing to its maturity, simple process, and absorption performance. − However, some individual disadvantages (e.g., equipment corrosion and high energy cost) limit the application of conventional alkanolamines for the removal of CO 2 . − …”

Section: Introductionmentioning

confidence: 99%

Analysis of Surface Thermodynamics for Amino Acid Ionic Liquid–1-Dimethylamino-2-propanol Aqueous Blends

et al. 2019

View full text Add to dashboard Cite

In this work, the surface tensions (γ) of the aqueous blends of 1-dimethylamino-2-propanol (DMA2P) + amino acid ionic liquids (AAILs) were studied using the Wilhelmy plate method at temperatures from 303.2 to 323.2 K and atmospheric pressure. The AAILs include tetramethylammoniumglycinate ([N1111][Gly]), 1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]), and 1-butyl-3-methylimidazolium-l-lysinate ([Bmim][Lys]). The concentrations of DMA2P and AAILs were varied between 0.300 and 0.500 wt % and 0.025 and 0.075 wt %, respectively. A thermodynamic correlation approach with respect to the mass fraction and temperature was employed to correlate the surface tension of DMA2P–AAILs aqueous solutions. The surface entropy (S S) and surface enthalpy (H S) were calculated from the analytical formulation, and their variation with mass fraction and temperature was demonstrated. The effects of the types of AAILs on the surface properties were also analyzed and compared.

show abstract

Solubility of Carbon Dioxide in Aqueous Solutions of Three Secondary Amines: 2-(Butylamino)ethanol, 2-(Isopropylamino)ethanol, and 2-(Ethylamino)ethanol Secondary Alkanolamine Solutions

Cited by 45 publications

References 23 publications

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Energy-Efficient CO₂ Capture Using Nonaqueous Absorbents of Secondary Alkanolamines with a 2-Butoxyethanol Cosolvent

Analysis of Surface Thermodynamics for Amino Acid Ionic Liquid–1-Dimethylamino-2-propanol Aqueous Blends

Contact Info

Product

Resources

About

Solubility of Carbon Dioxide in Aqueous Solutions of Three Secondary Amines: 2-(Butylamino)ethanol, 2-(Isopropylamino)ethanol, and 2-(Ethylamino)ethanol Secondary Alkanolamine Solutions

Cited by 45 publications

References 23 publications

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Carbon Dioxide Absorption Heat in Liquid–Liquid and Solid–Liquid Phase-Change Solvents Using Continuous Calorimetry

Energy-Efficient CO2 Capture Using Nonaqueous Absorbents of Secondary Alkanolamines with a 2-Butoxyethanol Cosolvent

Analysis of Surface Thermodynamics for Amino Acid Ionic Liquid–1-Dimethylamino-2-propanol Aqueous Blends

Contact Info

Product

Resources

About

Energy-Efficient CO₂ Capture Using Nonaqueous Absorbents of Secondary Alkanolamines with a 2-Butoxyethanol Cosolvent