Adsorption and diffusion of polar and non-polar liquids in aluminas by HPLC

Y. H. Ma, Jerry Lin, H. L. Fleming

Research output: Chapter in Book/Report/Conference proceedingConference contribution

27 Scopus citations

Abstract

The LC technique previously developed for the study of liquid adsorption and diffusion in zeolite crystals has been extended to study liquid adsorption and diffusion in alumina materials by the moment method using a commercial HPLC apparatus. The adsorption equilibrium constants (K e) and effective intraparticle diffusivity (D e) of polar and non-polar sorbates (pyridine, 1-nitropropane, acetone, ethyl acetate and toluene) with cyclohexane as the solvent in three aluminas are determined at 30, 50 and 70°C. The effects of the liquid sorbate polarity and alumina hydroxyl content on adsorption and diffusion in aluminas are experimentally examined. Values of K e for the polar sorbates are found to be substantially greater than those for non-polar sorbate, while values of D e are similar for all studied sorbates (in the order of 10 5 cm 2/s). The surface diffusivities calculated from D e decrease as K e increases. Experimental results show that the chemical nature between sorbate and alumina surface is the predominant factor affecting liquid adsorption and diffusion in aluminas.

Original languageEnglish (US)
Title of host publicationAIChE Symposium Series
PublisherPubl by AIChE
Pages1-12
Number of pages12
Volume84
Edition264
StatePublished - 1988
Externally publishedYes
EventAdsorption and Ion Exchange: Fundamentals and Applications - New York, NY, USA
Duration: Mar 6 1987Mar 10 1987

Other

OtherAdsorption and Ion Exchange: Fundamentals and Applications
CityNew York, NY, USA
Period3/6/873/10/87

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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