Simulation of solubility for separating carbon dioxide from gas mixture using ZIF-8/glycol slurry

ZONG Jie1 MA Qinglan1 CHEN Guangjin1 SUN Changyu1

(1.High Pressure Fluid Phase Behavior & Property Research Laboratory, China University of Petroleum, Beijing, China 102249)

【Abstract】The absorption–adsorption hybrid method has potential superiority on CO2 separation and capture. In this work, the Patel-Teja equation of state coupled with the Kurihara mixing rule was used to describe the absorption equilibrium. The binary interaction parameters between pure gas components and glycol were determined by correlating the experimental gas solubility data. Then, the Langmuir equation was applied to calculate the adsorption of gas in ZIF-8, and the correlation of osmotic pressure of glycol liquid membrane on the surface of ZIF-8 with the equilibrium fugacity of gas component was achieved. Finally, the obtained model was applied to predict the separation of CO2 from gas mixture using ZIF-8/glycol slurry.

【Keywords】 carbon dioxide; absorption–adsorption; hybrid method; thermodynamic model;

【DOI】

【Funds】 National Natural Science Foundation of China (U1162205, 51576209)

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(Translated by CAI TX)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 10, Pages 4276-4283+4132

October 2018

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Article Outline

Abstract

  • Introduction
  • 1 Thermodynamic model
  • 2 Osmotic pressure of glycol membrane on ZIF-8 surface
  • 3 Predictive calculation of separation and capture of CO2
  • 4 Conclusion
  • Symbol description
  • References