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Equilibrium solubility measurement and Kent‐Eisenberg modeling of CO 2 absorption in aqueous mixture of N‐methyldiethanolamine and hexamethylenediamine

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  • Bikash K. Mondal
  • Syamalendu S. Bandyopadhyay
  • Amar N. Samanta

Abstract

Vapor‐liquid equilibrium of CO 2 in aqueous mixture of hexamethylenediamine (HMDA) and N‐methyldiethanolamine (MDEA) has been investigated using a stirred equilibrium cell set‐up in the temperature and pressure range of 303–333K and 1–100kPa, respectively. Composition of the mixed amine solvents used are (5mass% HMDA+25mass% MDEA), (10 mass% HMDA+20 mass% MDEA), (15mass% HMDA+15mass% MDEA), and (20 mass% HMDA+10 mass% MDEA). Equilibrium solubility data is fitted using the Kent‐Eisenberg thermodynamic model. To fit experimental solubility data with model predicted data, bicarbamate formation and zwitterion deprotonation reaction equilibrium constants of HMDA are regressed as a function of CO 2 loading and temperature. Average absolute deviation between experimental and model predicted data is found to be 7.16%. © 2016 Society of Chemical Industry and John Wiley & Sons, Ltd.

Suggested Citation

  • Bikash K. Mondal & Syamalendu S. Bandyopadhyay & Amar N. Samanta, 2017. "Equilibrium solubility measurement and Kent‐Eisenberg modeling of CO 2 absorption in aqueous mixture of N‐methyldiethanolamine and hexamethylenediamine," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 7(1), pages 202-214, February.
    • Handle: RePEc:wly:greenh:v:7:y:2017:i:1:p:202-214
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    File URL: http://hdl.handle.net/10.1002/ghg.1653
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    References listed on IDEAS

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    1. Fu, Dong & Zhang, Pan, 2015. "Investigation of the absorption performance and viscosity for CO2 capture process using [Bmim][Gly] promoted MDEA (N-methyldiethanolamine) aqueous solution," Energy, Elsevier, vol. 87(C), pages 165-172.
    2. Fu, Dong & Zhang, Pan & Wang, LeMeng, 2016. "Absorption performance of CO2 in high concentrated [Bmim][Lys]-MDEA aqueous solution," Energy, Elsevier, vol. 113(C), pages 1-8.
    3. Fu, Dong & Zhang, Pan & Mi, ChenLu, 2016. "Effects of concentration and viscosity on the absorption of CO2 in [N1111][Gly] promoted MDEA (methyldiethanolamine) aqueous solution," Energy, Elsevier, vol. 101(C), pages 288-295.
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