Carbon dioxide capture via aqueous N-methyldiethanolamine (MDEA)-1-butyl-3-methylimidazolium acetate ([bmim][Ac]) hybrid solvent

Hailegiorgis, Sintayehu Mekuria; Khan, Saleem Nawaz; Abdolah, Nur Hanis H.; Ayoub, Muhammad; Tesfamichael, Aklilu

doi:10.1063/1.5005379

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…Overall, base capture process is expected to cost about 20-30 % of total power plant output to remove 90 % of CO2 in flue gas [4]. Degradation of amine solvent, controlling and treatment of degradation products, and amine loss due to volatile emissions also add to the cost and affect performance [11,12].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

High-pressure absorption study of CO 2 in aqueous N -methyldiethanolamine (MDEA) and MDEA-piperazine (PZ)-1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] hybrid solvents

Khan

Hailegiorgis

Man

et al. 2018

Journal of Molecular Liquids

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High-pressure absorption study of CO2 in aqueous N-methyldiethanolamine (MDEA) and MDEA-piperazine (PZ)-1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] hybrid solvents. Abstract:In present study, high pressure CO2 absorption performance of aqueous N-methyldiethanolamine (MDEA) and its hybrid solvents with anhydrous piperazine (PZ) and ionic liquid (IL) 1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] were investigated. The absorption performance of hybrid solvents were carried out to investigate CO2 loading capacity (mol of CO2/mol of solvent), and apparent absorption rate (CO2 capture efficiency, overall rate constant). The CO2 loading capacity of aqueous MDEA and its hybrid solvents were experimentally investigated for a wide range of compositions between pressure ranges of 2 to 50 bar and at three different temperatures (303.15, 313.15, and 333.15 K). Furthermore, apparent absorption rate performance of hybrid solvents were determined at 303.15 K temperature and 2 bar pressure. The effect of temperature, CO2 partial pressure, and ionic liquid (IL) concentrations on CO2 loading of aqueous IL-amines hybrid solvent were also investigated. The results indicated that CO2 loading of hybrid solvents were increased with ACCEPTED MANUSCRIPTA C C E P T E D M A N U S C R I P T 2 increase in CO2 partial pressure and IL concentration (up to 10 wt. %), further increased concentration of IL suppressed CO2 loading capacity. The CO2 loading capacity of hybrid solvents were also reduced with rise in system's temperature. The addition of IL and anhydrous PZ significantly enhanced CO2 capture efficiency (nCO2) and overall absorption rate constant (k) of aqueous MDEA solvent.

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Section: Accepted Manuscriptmentioning

confidence: 99%

High-pressure absorption study of CO 2 in aqueous N -methyldiethanolamine (MDEA) and MDEA-piperazine (PZ)-1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] hybrid solvents

Khan

Hailegiorgis

Man

et al. 2018

Journal of Molecular Liquids

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“…The effects of changing the operating conditions and geometric parameters on the temperature difference across the stack are also theoretically and physically demonstrated using the free simulation software DeltaEC. Thermoacoustic technologies could be an alternative to other technologies that can have severe environmental impacts [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Finding viable applications of thermoacoustic engines and refrigerators has turned out to be quite challenging [27].…”

Section: ̇=̇+̇+̇ℎmentioning

confidence: 99%

Thermoacoustic Refrigerators and Heat Pumps: New Insights for A High Performance

Alamir

Sidik²

2020

ARFMTS

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Thermoacoustic refrigerators and heat pumps are considered one of the important emerging green technologies. They are based on the use of acoustic pressure waves to supply cooling or heating effects. The oscillating gas interaction with a solid wall called the stack generates thermoacoustic effects. This study presents the effects of the operating conditions and geometric parameters on the temperature difference across the stack and the coefficient of performance of a thermoacoustic heat pump at different cooling loads. The design steps of these systems were also demonstrated. Theoretical study of the operation conditions and geometric parameters was presented using “DeltaEC”. The results showed that higher harmonics are less desirable for thermoacoustic phenomena as they lower the temperature difference across the stack. Further insights into the effects of amplitude pressure, mean pressure and stack geometries were also demonstrated. This study helps to establish the concepts and design steps for thermoacoustic refrigerators and heat pumps.

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“…The CO2 absorption capacity of the IL-amine blend was mainly a function of amine concentration and the presence of water reduces the IL-amine blend viscosity, which makes it an industrially viable solvent [24] Further experimental investigation on IL-amine solvent revealed that the hybrid solvent achieved lower energy consumption compared to conventional solvent [26] and demonstrated better corrosion control with carbon steel material compared with aqueous amine [27]. More experimental studies on IL-amine solvents can be found in [28][29][30][31]. It can be seen that an industrially competitive hybrid solvent could be developed by blending ILs with amine solutions to enhance the CO2 removal performance.…”

Section: Fig 1 General Structure Of Various Cations and Anions Used mentioning

confidence: 99%

Study of CO2 removal in natural gas process using mixture of ionic liquid and MEA through process simulation

Akinola

Oko

Wang

2019

Fuel

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There has been a shift to less carbon intensive fuels such as natural gas to meet energy demand due to increasing pressure to cut CO2 emissions. This has prompted a need to assess unconventional and contaminated natural gas reserves (which contains CO2 concentration of 20mol% or more). The CO2 capture process with MEA as the solvent is mostly adopted to treat contaminated natural gas. In this study, the option of using a blend of ionic liquids (IL) and MEA as a promising solvent in the process was investigated through modelling and simulation. A detailed rate-based model was developed for both MEA (30wt%) solvent and IL (30wt%)-MEA (30wt%) blend using Aspen Plus ® to assess both process and economic performances. The 1-Butylpyridinium ([bpy][BF4]) ionic liquid was selected in this study. The physiochemical properties of [bpy][BF4], predicted using Aspen Plus ® , showed good accuracy compared with experimental data. The results from this study showed about 15% and 7.44% lower energy consumption in the reboiler duty and CO2 removal cost respectively with aqueous [bpy][BF4]-MEA solvent compared to 30 wt% MEA solvent. It is concluded that the aqueous [bpy][BF4]-MEA solvent is therefore a promising solvent that could replace 30 wt% MEA solvent in this process.

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Carbon dioxide capture via aqueous N-methyldiethanolamine (MDEA)-1-butyl-3-methylimidazolium acetate ([bmim][Ac]) hybrid solvent

Cited by 6 publications

References 12 publications

High-pressure absorption study of CO 2 in aqueous N -methyldiethanolamine (MDEA) and MDEA-piperazine (PZ)-1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] hybrid solvents

High-pressure absorption study of CO 2 in aqueous N -methyldiethanolamine (MDEA) and MDEA-piperazine (PZ)-1-butyl-3-methylimidazolium trifluoromethanesulfonate [bmim][OTf] hybrid solvents

Thermoacoustic Refrigerators and Heat Pumps: New Insights for A High Performance

Study of CO2 removal in natural gas process using mixture of ionic liquid and MEA through process simulation

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