Experimental Study on CO2 Solubility in Aqueous Piperazine/Alkanolamines Solutions at Stripper Conditions

Inoue, Shota; Itakura, Takuya; Nakagaki, Takao; Furukawa, Yukio; Satō, Hiroshi; Yamanaka, Yasumitsu

doi:10.1016/j.egypro.2013.06.051

Cited by 14 publications

(11 citation statements)

References 22 publications

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“…the present studied solvent system. Many researchers have also reported a similar behavior in CO2 loading values with temperature in the literature[53][54][55]. Absorption rate performance of hybrid solventsThe absorption rate performance of aqueous IL-amines hybrid solvent was investigated using high-pressure solubility cell.…”

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confidence: 66%

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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confidence: 66%

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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“…Specifically, 1,6-Diaminohexane (HMDA), 1,4-Diaminobutane (DAB), N-(2-Aminoethyl) piperazine (AEP), Benzylamine (BZA), and N-Methyl-1,3diaminopropane (MAPA) were evaluated. Figure 2 provides a schematic of the reaction rate test apparatus (Inoue et al, 2013). A mixture of gaseous CO2 and N2 is supplied into the heated reactor, and the reaction rate is calculated by measuring the CO2 concentration of the outlet gas, yielding the CO2 absorbed per unit area.…”

Section: Selection Of Promoters Based On Reaction Rate Testingmentioning

confidence: 99%

Performance Evaluation of Phase Separation Process Using High-concentration AMP Promoted by MAPA for CO₂ Capture

et al. 2021

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Reduction of the energy penalty and cost of CO2 capture from concentrated gas streams using amine-based solutions can be achieved by minimizing the energy penalty in the solvent regeneration process. High concentration 2-Amino-2-methyl-1-propanol (AMP) solution precipitates as a carbonate when enough CO2 has been absorbed. By sending the separated carbonate to the stripper, the sensible heat of regeneration can be reduced. However, previous testing using 50 weight percent AMP solution mixed with Piperazine (PZ) with solid-liquid separation showed that the CO2 recovery rate was limited to 65% due to the lack of PZ regeneration. To improve the CO2 recovery rate, a novel solution and injection process were developed. N-Methyl-1,3-diaminopropane (MAPA) was selected as an alternative promoter based on reaction rate testing. Various tests were employed to characterize the behaviour of the AMP/MAPA solution under CO2 capture and recovery conditions. The injection point was relocated to avoid the inhibition of CO2 absorption observed when CO2 semi-lean liquid was sent to the upper portion of the absorber. The CO2 recovery rate and the precipitation quantity were simulated using a model built in Aspen Plus®. The novel solution and injection set-up were evaluated experimentally by a bench-scale apparatus.

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“…The role of various solvents in CO 2 regeneration performance was experimentally examined by Inoue et al . (2013) . They compared the standalone PZ with five binary solutions of PZ, such as PZ/MDEA, PZ/IPEA, PZ/MEA, PZ/DEA and PZ/MDEA at a stripper operating temperature range between 40 and 120°C.…”

Section: Post Combustion Capture (Pcc) For Co2mentioning

confidence: 99%

Post‐combustion CO₂ capture with chemical absorption and hybrid system: current status and challenges

et al. 2018

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Post-combustion CO 2 capture from the power and industrial sectors has gained widespread attention due to its ability to retrofit easily with newly installed and existing plants. This state-of-the-art, updated review provides an overview of technical issues in post-combustion CO 2 capture related to process performance, energy requirements for CO 2 capture, and inconsistencies in the prediction of CO 2 capture cost. Recent updates are presented regarding chemical absorption-desorption systems, and particularly CO 2 absorption and solubility enhancement studies, absorber operation at elevated pressure, recent developments in absorber configuration, and methods for reducing the heat duty of strippers. Furthermore, recently developed post-combustion hybrid techniques such as the membrane-absorbent hybrid process, the membrane-cryogenic hybrid process, the membrane-adsorption hybrid process, the absorption-electrolysis hybrid process, and the solar thermal electrochemical process (STEP) are discussed. Finally, we suggest areas for improvement and indicate that there are significant future prospects for post-combustion CO 2 capture. C

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Experimental Study on CO2 Solubility in Aqueous Piperazine/Alkanolamines Solutions at Stripper Conditions

Cited by 14 publications

References 22 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

Performance Evaluation of Phase Separation Process Using High-concentration AMP Promoted by MAPA for CO₂ Capture

Post‐combustion CO₂ capture with chemical absorption and hybrid system: current status and challenges

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Experimental Study on CO2 Solubility in Aqueous Piperazine/Alkanolamines Solutions at Stripper Conditions

Cited by 14 publications

References 22 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

Performance Evaluation of Phase Separation Process Using High-concentration AMP Promoted by MAPA for CO2 Capture

Post‐combustion CO2 capture with chemical absorption and hybrid system: current status and challenges

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Performance Evaluation of Phase Separation Process Using High-concentration AMP Promoted by MAPA for CO₂ Capture

Post‐combustion CO₂ capture with chemical absorption and hybrid system: current status and challenges