Kinetics modeling of adsorption and desorption of benzaldehyde and benzyl alcohol on polymeric resin in supercritical CO2

Xiaoning Yang, Yaping Li, Carl T. Lira

Research output: Research - peer-reviewArticle

Abstract

In this work, a kinetics model was developed for the adsorption and desorption processes of benzaldehyde and benzyl alcohol on the polymeric resin adsorbent in supercritical carbon dioxide (scCO2). This kinetics model takes into account adsorption equilibrium, internal diffusion in porous medium, mass transfer between fluid-sold interfaces, and axial dispersion in supercritical fluid. The breakthrough curves measured in a fixed-bed have been fitted by this model under various operational conditions. This model uses the intraparticle diffusion coefficient as the fitting parameter and other transfer parameters can be calculated through current correlation equations. A satisfactory agreement between the modeling results and the experimental data has been obtained with just one fitting parameter. The effect of temperature, pressure, and concentration on the intraparticle diffusion coefficient has been investigated and the molecular pore diffusion within the solid adsorbent is found to be the rate-controlling step for the overall adsorption process. Moreover, the theoretical model has also been demonstrated to reasonably predict the desorption behavior for the two solutes in scCO2. Our work presents an effective and concise theoretical framework for adsorption/desorption kinetics in scCO2 fluid.

LanguageEnglish (US)
Pages253-260
Number of pages8
JournalJournal of CO2 Utilization
Volume21
DOIs
StatePublished - Oct 1 2017

Profile

Benzyl Alcohol
Carbon Monoxide
Desorption
Resins
Adsorption
Kinetics
benzaldehyde
alcohol
resin
desorption
adsorption
kinetics
modeling
Alcohols
fluid
parameter
Adsorbents
Fluids
Supercritical fluids
Carbon Dioxide

Keywords

  • Adsorption
  • Benzaldehyde
  • Benzyl alcohol
  • Desorption
  • Kinetics model
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology

Cite this

Kinetics modeling of adsorption and desorption of benzaldehyde and benzyl alcohol on polymeric resin in supercritical CO2 . / Yang, Xiaoning; Li, Yaping; Lira, Carl T.

In: Journal of CO2 Utilization, Vol. 21, 01.10.2017, p. 253-260.

Research output: Research - peer-reviewArticle

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AB - In this work, a kinetics model was developed for the adsorption and desorption processes of benzaldehyde and benzyl alcohol on the polymeric resin adsorbent in supercritical carbon dioxide (scCO2). This kinetics model takes into account adsorption equilibrium, internal diffusion in porous medium, mass transfer between fluid-sold interfaces, and axial dispersion in supercritical fluid. The breakthrough curves measured in a fixed-bed have been fitted by this model under various operational conditions. This model uses the intraparticle diffusion coefficient as the fitting parameter and other transfer parameters can be calculated through current correlation equations. A satisfactory agreement between the modeling results and the experimental data has been obtained with just one fitting parameter. The effect of temperature, pressure, and concentration on the intraparticle diffusion coefficient has been investigated and the molecular pore diffusion within the solid adsorbent is found to be the rate-controlling step for the overall adsorption process. Moreover, the theoretical model has also been demonstrated to reasonably predict the desorption behavior for the two solutes in scCO2. Our work presents an effective and concise theoretical framework for adsorption/desorption kinetics in scCO2 fluid.

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