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Adsorption equilibrium of benzaldehyde and benzyl alcohol onto polymeric resin from supercritical CO2

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Abstract

A frontal chromatographic technique was used to measure the adsorption isotherms of benzaldehyde and benzyl alcohol onto a polymeric resin in supercritical CO2 (scCO2). The effect of temperature and pressure (density) on adsorption behavior was investigated. It was observed that benzyl alcohol has stronger adsorption than benzaldehyde. The desorption of benzaldehyde using scCO2 from the polymeric resin adsorbent was studied under the same temperature and pressure ranges. The local equilibrium theory was found to reasonably predict the desorption profiles. A phenomenological statistical thermodynamic model combined with classic Peng–Robinson equations of state was used to correlate the adsorption equilibrium isotherms of the solutes from scCO2. This theoretical model with three parameters is able to describe the adsorption behavior over wide temperature and pressure ranges.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China under Grants 21376116, Research funding from State Key Laboratory of Materials-Oriented Chemical Engineering (ZK201404), and A PAPD Project of Jiangsu Higher Education Institution.

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Authors and Affiliations

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China

    Xiaoning Yang

  2. Department of Chemical Engineering, Michigan State University, East Lansing, MI, 48824, USA

    Carl T. Lira

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  1. Xiaoning Yang
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  2. Carl T. Lira
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Correspondence to Xiaoning Yang.

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Yang, X., Lira, C.T. Adsorption equilibrium of benzaldehyde and benzyl alcohol onto polymeric resin from supercritical CO2 . Adsorption 23, 63–71 (2017). https://doi.org/10.1007/s10450-016-9819-4

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  • DOI: https://doi.org/10.1007/s10450-016-9819-4

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