Scholarlink

<p>In this study, the Extended UNIQUAC thermodynamic model for electrolyte solutions was used to calculate the solubility of carbon dioxide in potassium carbonate aqueous solution. Available experimental data were used for determining the model parameters at temperatures of 313.15&#xa0;K to 393.15&#xa0;K, different equilibrium pressures (up to 1.2&#xa0;MPa) and different solution concentrations of 15, 20 and 30 wt%. The value of the unknown parameters of the Extended UNIQUAC model, including the volume parameters, the surface parameters and the interaction energy parameters were optimized by nonlinear optimization method using experimental data available for ternary CO<sub>2</sub>–K<sub>2</sub>CO<sub>3</sub>–H<sub>2</sub>O system. The fugacity coefficient in the vapor phase was obtained using Soave–Redlich–Kwong equation of state (SRK-EOS). The results of this study show that the Extended UNIQUAC is a consistent thermodynamic model for representing vapor–liquid equilibrium (VLE) of the CO<sub>2</sub>–K<sub>2</sub>CO<sub>3</sub>–H<sub>2</sub>O system and the average absolute relative deviation (AARD) between the experimental and the predicted data was 3.81%.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Extended-UNIQUAC Model for Thermodynamic Modeling of CO2 Absorption in Aqueous Potassium Carbonate Solution

  • 期刊论文

  • 发表日期：

    2025年10月11日

查看全文
  • Fereshteh Samadi

摘要

In this study, the Extended UNIQUAC thermodynamic model for electrolyte solutions was used to calculate the solubility of carbon dioxide in potassium carbonate aqueous solution. Available experimental data were used for determining the model parameters at temperatures of 313.15 K to 393.15 K, different equilibrium pressures (up to 1.2 MPa) and different solution concentrations of 15, 20 and 30 wt%. The value of the unknown parameters of the Extended UNIQUAC model, including the volume parameters, the surface parameters and the interaction energy parameters were optimized by nonlinear optimization method using experimental data available for ternary CO2–K2CO3–H2O system. The fugacity coefficient in the vapor phase was obtained using Soave–Redlich–Kwong equation of state (SRK-EOS). The results of this study show that the Extended UNIQUAC is a consistent thermodynamic model for representing vapor–liquid equilibrium (VLE) of the CO2–K2CO3–H2O system and the average absolute relative deviation (AARD) between the experimental and the predicted data was 3.81%.