Adsorption of supercritical carbon dioxide + 2,6- and 2,7-dimethylnaphthalene isomers on NaY-type zeolite

Yoshio Iwai, Masashi Higuchi, Hiromasa Nishioka, Yuichi Takahashi, Yasuhiko Arai

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17 Citations (Scopus)

Abstract

The surface excess amounts of supercritical carbon dioxide (SC-CO 2) on NaY-type zeolite were measured by an isochoric method at 308.2 K. The adsorption amounts of 2,6- and 2,7-dimethylnaphthalene (DMN) isomers dissolved in SC-CO2 were also measured at 308.2 K by an isochoric method with an ultraviolet detector. The surface excess amounts of CO 2 show a maximum value near the critical pressure of CO2 and then markedly decrease with increasing pressure and eventually become constant at high pressure. The adsorption amounts of 2,6- and 2,7-DMN gradually decrease with increasing total pressure. The adsorption amounts of 2,7-DMN are about six times higher than those of 2,6-DMN. The separation coefficients in supercritical CO2 are much higher than those in liquid octane and ethanol. The experimental data were correlated by an extended Radke-Prausnitz equation. The correlated results are in good agreement with the experimental data.

Original languageEnglish
Pages (from-to)5261-5267
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Volume42
Issue number21
DOIs
Publication statusPublished - Oct 15 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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