Adsorption of o-cresol and benzoic acid in an adsorber packed with an ion-exchange resin: A comparative study of diffusional models

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399408002187· OSTI ID:99110

Huang, Run-Tun; Chen, Teh-Liang; Weng, Hung-Shan ^[1]

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1. National Cheng Kung Univ., Taiwan (China)

Both solid- and pore-diffusion models were employed to simulate the adsorption of o-cresol and benzoic acid in a fixed-bed adsorber packed with an anion-exchange resin. The equilibrium adsorption data were modeled by a Langmuir isotherm. When the shape of the adsorption isotherm was approximately linear (as in the case of o-cresol), both models agreed well with the experimental break-through data, and they could be effectively applied to predict the breakthrough curve of longer columns. For a favorable adsorption isotherm (say, benzoic acid), however, better results were obtained by using the solid-diffusion model. In addition to the shape of the adsorption isotherm, several factors, such as the type of adsorbent, modeling of equilibrium data, computation efficiency, and concentration dependence of the intraparticle diffusivity, should also be taken into account for selecting a suitable diffusion model.

• Sponsoring Organization: USDOE
• OSTI ID: 99110
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 15 Vol. 29; ISSN SSTEDS; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
99 GENERAL AND MISCELLANEOUS
ADSORPTION
BENZOIC ACID
CRESOLS
DIFFUSION
EFFICIENCY
ION EXCHANGE
ION EXCHANGE MATERIALS
MATHEMATICAL MODELS
RESINS
SEPARATION PROCESSES
SORPTIVE PROPERTIES