Adsorption in Perfect Mixing Tank – Comparison of Exact and Approximate Kinetic Models

• Authors: Krzysztof Kupiec , Monika Gwadera , Barbara Larwa
• Languages of publication: EN

Abstracts

EN

Periodic adsorption in a perfect mixing tank of a limited volume was considered. It was assumed that the adsorption rate is limited by diffusion resistance in a pellet. The approximate model of diffusion kinetics based on a continued fraction approximation was compared with the exact analytical solution. For the approximate model an algorithm was developed to determine a temporal variation of the adsorbate concentration in the pellet. The comparison was made for different values of the adsorbent load factor. In the numerical tests different shapes of pellets were considered. Both the numerical tests as well as our own experimental results showed that the approximate model provides results that are in good agreement with the exact solution. In the experimental part of this work adsorption of p-nitrophenol and acetic acid from aqueous solutions on cylindrical pellets of activated carbon was conducted.

Keywords

EN

approximate kinetic equations; adsorption in vessel

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2014
• Volume: 35
• Issue: 3
• Pages: 277-291

Dates

published

1 - 9 - 2014

received

11 - 12 - 2013

online

17 - 10 - 2014

revised

26 - 3 - 2014

accepted

7 - 5 - 2014

Contributors

author

Krzysztof Kupiec

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Kraków, Poland

author

Monika Gwadera

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Kraków, Poland

author

Barbara Larwa

• Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Kraków, Poland

References

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Identifiers

DOI

10.2478/cpe-2014-0021