Extended UNIQUAC model for thermodynamic modeling of CO2 absorption in aqueous alkanolamine solutions

Faramarzi, Leila; Kontogeorgis, Georgios M.; Thomsen, Kaj; Stenby, Erling Halfdan

doi:10.1016/j.fluid.2009.05.002

Cited by 98 publications

(35 citation statements)

References 52 publications

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“…This was done using the extended UNIQUAC model for the MEA-carbon dioxide-water (Faramarzi et al, 2009) and the ammonia-carbon dioxide-water (Darde et al, 2010b) systems that allowed for assessing the equilibrium partial pressures of water and ammonia/MEA in the column and in the outlet.…”

Section: Methodsmentioning

confidence: 99%

“…The inlet flow rates of carbon dioxide and nitrogen are recorded by the mass flow controllers. The gaseous flow of MEA/ammonia and water in the chamber is calculated using the equilibrium calculations from the extended UNIQUAC thermodynamic model available for the MEA-CO 2 -H 2 O (Faramarzi et al, 2009) and the NH 3 -CO 2 -H 2 O (Darde et al, 2010b) systems at the experimental conditions. P CO 2 ,in and P CO 2 ,out are the inlet and outlet partial pressures of carbon dioxide (Pa) and P is the total pressure of the system.…”

Section: Liquidbulk Vaporbulk Interfacementioning

confidence: 99%

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Experimental measurement and modeling of the rate of absorption of carbon dioxide by aqueous ammonia

Darde

Well

Fosboel

et al. 2011

International Journal of Greenhouse Gas Control

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Section: Methodsmentioning

confidence: 99%

Section: Liquidbulk Vaporbulk Interfacementioning

confidence: 99%

Experimental measurement and modeling of the rate of absorption of carbon dioxide by aqueous ammonia

Darde

Well

Fosboel

et al. 2011

International Journal of Greenhouse Gas Control

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“…Post combustion CO 2 capture using amine as absorbent is one of the mature technologies for reducing CO 2 emissions from coal-fired power plants [3][4][5][6][7][8]. Aqueous solutions of MDEA have been widely used for the removal of CO 2 form a variety of gas streams [9,10].…”

Section: Introductionmentioning

confidence: 99%

Study on the surface tensions of MDEA-methanol aqueous solutions

Wang

et al. 2017

IOP Conf. Ser.: Earth Environ. Sci.

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IntroductionClimate change and environmental problems caused by the emissions of carbon dioxide (CO 2 ) have attracted increasing attentions worldwide and the reduction of CO 2 has become a global issue [1,2]. Post combustion CO 2 capture using amine as absorbent is one of the mature technologies for reducing CO 2 emissions from coal-fired power plants [3][4][5][6][7][8]. Aqueous solutions of MDEA have been widely used for the removal of CO 2 form a variety of gas streams [9,10]. Besides the amine blends, adding a physical solvent to the aqueous solutions of alkanolamines is considered to be an effective method to lower the regeneration energy cost [11,12]. For example, Archane et al.[11] studied the vapor-liquid equilibria, the concentration of the molecular form of absorbed CO 2 , the partial pressure of CO 2 and the liquid phase speciation for CO 2 -poly(ethylene oxide)400 (PEG400)-diethanolamine (DEA) aqueous solutions, and demonstrated the influence of PEG400 on the absorption of CO 2 . Their results showed that lower energy cost can be achieved in regeneration because at a given CO 2 loading and constant concentration of DEA, the CO 2 molecular concentration increases with the increase of PEG400 concentration, whereas the ion repartition is not significantly influenced by the solvent composition. Henni and Mather [13] studied the solubility of CO 2 in a mixed nonaqueous solvent of MDEA and MeOH. The results showed that at low acid gas partial pressures the solubility of CO 2 is higher in the mixed solvent than in pure MeOH. A knowledge of surface tension is required when designing or simulating an absorption column for CO 2 capture. In recent years, there are many experimental and theoretical works concerning the surface tensions of aqueous solutions containing MDEA and physical solvent. Fu et al. [14] measured the surface tensions of PEG400, MEA-PEG400 and DEA-PEG400 aqueous solutions and satisfactorily modeled by using a thermodynamic equation. On the basis of experiments and calculation, they demonstrated the effects of the temperature, the mass fractions of amines and PEG400 on the surface tension. Fu et al. [15] studied the surface tensions of MDEA-piperazine (PZ) aqueous solutions. They proposed a theoretical model to correlate the surface tensions and the calculated results agreed well with

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“…Based on the different oil industry and fuel conversion processes, the possible impurities are summarized in Table 2. Recently, comprehensive reviews on the experimental PVTxy-data of CO 2 /H 2 O and CO 2 /amines have been published [6][7][8][9][10][11][12]. In addition, an extensive review of the available experimental data and models for CO 2 -hydrates has been presented previously [13].…”

Section: Possible Impuritiesmentioning

confidence: 99%

PVTxy properties of CO2 mixtures relevant for CO2 capture, transport and storage: Review of available experimental data and theoretical models

et al. 2011

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Extended UNIQUAC model for thermodynamic modeling of CO2 absorption in aqueous alkanolamine solutions

Cited by 98 publications

References 52 publications

Experimental measurement and modeling of the rate of absorption of carbon dioxide by aqueous ammonia

Experimental measurement and modeling of the rate of absorption of carbon dioxide by aqueous ammonia

Study on the surface tensions of MDEA-methanol aqueous solutions

PVTxy properties of CO2 mixtures relevant for CO2 capture, transport and storage: Review of available experimental data and theoretical models

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