Thermally induced characterization and modeling of physicochemical, acoustic, rheological, and thermodynamic properties of novel blends of (HEF + AEP) and (HEF + AMP) for CO2/H2S absorption

  • Sweta Balchandani
  • Bishnupada Mandal
  • Swapnil DharaskarEmail author
  • Arvind Kumar
  • Syamalendu Bandyopadhyay
Research Article


CO2 and H2S removal from flue gases is indispensable to be done for protection of environment with respect to global warming as well as clean air. Chemical absorption is one of the most developed and capable techniques for the removal of these sour gases. Among the many solvents, ionic liquids (ILs) are more capable due to their desirable green solvent properties. However, ILs being usually costlier, the blends of ILs and amines are more suggestive for absorption. In the present work, various essential characterization properties such as density, viscosity, sound velocity, and refractive index of two ionic liquid–amine blend systems viz. (1) 2-Hydroxy ethyl ammonium formate (HEF) + 1-(2-aminoethyl) piperazine (AEP) and (2) 2-Hydroxy ethyl ammonium formate (HEF) + 2-Amino-2-methyl-1-propanol (AMP) are reported. The temperature range for which all the measurements were conducted is 298.15 to 333.15 K. For both systems of (HEF + AEP) and (HEF + AMP), HEF mass fractions were varied from 0.2 to 0.8.The density and viscosity results were correlated as a function of temperature and concentration of ionic liquid and amine with Redlich-Kister and Grunberg-Nissan models, respectively. Moreover, feed forward neural network model (ANN) is explored for correlating experimentally determined sound velocity and refractive index data. The measured properties are further analyzed to estimate various thermodynamic as well as transport properties such as diffusivity of CO2/H2S in the (HEF + AEP) and (HEF + AMP), thermal expansion coefficients, and isentropic compressibility, ΔG0, ΔS0, ΔH0, using the available models in the literature.


Carbon dioxide Hydrogen sulfide HEF Redlich-Kister Grunberg-Nissan ANN 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11356_2019_6305_MOESM1_ESM.doc (164 kb)
ESM 1 (DOC 163 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Sweta Balchandani
    • 1
    • 2
  • Bishnupada Mandal
    • 1
  • Swapnil Dharaskar
    • 2
    Email author
  • Arvind Kumar
    • 3
  • Syamalendu Bandyopadhyay
    • 2
  1. 1.Department of Chemical EngineeringIndian Institute of TechnologyGuwahatiIndia
  2. 2.Department of Chemical Engineering, School of TechnologyPandit Deendayal Petroleum UniversityGandhinagarIndia
  3. 3.Salt and Marine Chemicals DisciplineCSIR-Central Salt and Marine Chemicals Research InstituteBhavnagarIndia

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