Implementation of electrolyte CPA EoS to model solubility of CO2 and CO2 + H2S mixtures in aqueous MDEA solutions

Alireza Afsharpour; Ali Haghtalab

Your Location：

Home >

Browse articles >

Implementation of electrolyte CPA EoS to model solubility of CO₂ and CO₂ + H₂S mixtures in aqueous MDEA solutions

Chemical Engineering Thermodynamics | Updated：2026-01-06

- Implementation of electrolyte CPA EoS to model solubility of CO₂ and CO₂ + H₂S mixtures in aqueous MDEA solutions
- Chinese Journal of Chemical Engineering Vol. 27, Issue 8, Pages: 1912-1920(2019)
- Affiliations：
  
  1. Department of Chemical Engineering, Tarbiat Modares University, P. O. Box 14115-114, Tehran,Iran
  2. Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood,Iran
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2019
- Accepted：
Scan QR Code
and CO
DOI：

and CO DOI：

摘要

Abstract

The electrolyte version of SRK plus association equation of state (eSRK-CPA EoS) was employed to correlate CO

solubility in MDEA aqueous solutions. The applied model comprises the classic form of CPA EoS including SRK EoS plus Wertheim association term in addition to MSA theory and Born terms so that the two last terms are responsible for the long-range interactions. A reaction-containing bubble pressure computation technique comprising two nested loops was utilized to model the systems. The internal loop

calculates the liquid phase concentrations

via

reaction

mass and charge balance equation solving

whereas

the vapor phase concentrations will be obtained in the external one. 470 experimental data were used to correlate binary subsystems and the H

O + MDEA + CO

ternary system. Since

there not exist any binary VLE data for MDEA + CO

subsystem

two fitting scenarios were applied. At the first scenario

the binary interaction parameter was assumed equal to zero

while

in second approach the parameter was obtained through ternary system correlation. Both scenarios show very good accurac

y in that the Absolute Average Deviation percentages (AAD) obtained were 19.12% and 18.85%

respectively. Also

to show the efficiency of the used model

a comparison between our results and those of the best-known models was made. Finally

having model parameters for H

S solubility from our previous work[A. Afsharpour

Petroleum Science and Technology 35 (3) (2017) 292-298

]

simultaneous solubility of CO

+ H

S mixtures in MDEA solutions was predicted using the eSRK-CPA EoS with no new optimizable parameters. As the results show

the applied model has a good performance for correlation and prediction of acid gas solubility in a wide range of pressures

temperatures

acid gas loadings

and MDEA concentrations.

关键词

Keywords

references

Views

167

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Research on composite scale inhibitors for inhibiting calcium carbonate scaling in high temperature geothermal fluid

Improved neural network automation design method for energy saving and carbon emission reduction of petrochemical production processes

Nickel and iron impregnated alkali-modified fly ash nanoparticle for improved CO2 capture performance in MDEA aqueous solutions

Experimental study of methane hydrate formation and rheological behavior in gas-water-sand system

Evaporation crystallization for the extraction of potassium bromide from bitters by phase equilibrium

Related Author

Li Shuai

Ma Yongli

Cao Baixu

Liu Mingyan

Lin Guocong

Ni Qingxu

Liu Xuehai

Geng Zhiqiang

Related Institution

State Key Laboratory of Chemical Engineering and Low Carbon Technology (Tianjin University)

School of Chemical Engineering and Technology, Tianjin University

School of Economics and Management, Beijing University of Chemical Technology

Sinopec Sales Co., Ltd., North China Branch

Engineering Research Center of Intelligent PSE, Ministry of Education of China

⁰