Impulse Response Analysis for Adsorption of 2,6- and 2,7-Dimethylnaphthalenes in Supercritical Carbon Dioxide Using NaY-Type Zeolite

Hirohisa Uchida, Yoshio Iwai, Mitsuru Nitta, Yasuhiko Arai

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8 Citations (Scopus)

Abstract

Adsorption behaviors (adsorption coefficient, intraparticle effective diffusion coefficient, and axial dispersion coefficient) of benzene and 2,6- and 2,7-dimethylnaphthalene (DMN) on NaY-type zeolite in supercritical carbon dioxide were studied by impulse response analysis. The experiments were performed at temperatures of 308.2, 318.2, and 328.2 K and pressures of 12.0, 14.8, and 19.8 MPa. It was found that larger adsorption coefficients for benzene and 2,6- and 2,7-DMN are obtained at lower pressure and higher temperature and that larger intraparticle effective diffusion coefficients and the larger axial dispersion coefficients for all systems are obtained at higher temperature. However, it was shown that pressure little affects the intraparticle effective diffusion coefficients and the axial dispersion coefficients. The adsorption coefficients for 2,7-DMN are larger than those for 2,6-DMN and the intraparticle effective diffusion coefficients for 2,7-DMN are almost the same as those for 2,6-DMN.

Original languageEnglish
Pages (from-to)595-598
Number of pages4
JournalIndustrial and Engineering Chemistry Research
Volume37
Issue number2
DOIs
Publication statusPublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

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

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