Phase equilibria for the mixtures of supercritical methanol + C18 methyl esters and supercritical methanol + α-tocopherol

Tao Fang, Yusuke Shimoyama, Toshio Abeta, Yoshio Iwai, Mitsuru Sasaki, Motonobu Goto

Research output: Contribution to journalArticle

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Abstract

Phase equilibrium data for methanol + C18 methyl esters and methanol + α-tocopherol were measured at 523-573 K in the pressure ranges of 2.45-11.45 MPa for C18 methyl esters and 3.19-15.02 MPa for α-tocopherol, respectively. The measured data were correlated using Peng-Robinson equation of state (PR EOS) with conventional mixing rules. The distribution coefficients of C18 methyl esters and α-tocopherol in methanol were discussed. The data illustrate that when the pressure is lower than the critical pressure of methanol (8.097 MPa), the mole fractions of methanol in vapor are very close to unity for both systems. When the pressure increased over 8 MPa, the distribution coefficients increased significantly for C18 methyl esters at 548-573 K and for α-tocopherol at 573 K. Noticeably, this work firstly reports the phase equilibrium data of C18 methyl esters in methanol at high temperatures and pressures.

Original languageEnglish
Pages (from-to)140-146
Number of pages7
JournalJournal of Supercritical Fluids
Volume47
Issue number2
DOIs
Publication statusPublished - Dec 1 2008

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tocopherol
Tocopherols
Phase equilibria
Methanol
esters
Esters
methyl alcohol
critical pressure
coefficients
Equations of state
unity
equations of state
low pressure
Vapors
vapors

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

Phase equilibria for the mixtures of supercritical methanol + C18 methyl esters and supercritical methanol + α-tocopherol. / Fang, Tao; Shimoyama, Yusuke; Abeta, Toshio; Iwai, Yoshio; Sasaki, Mitsuru; Goto, Motonobu.

In: Journal of Supercritical Fluids, Vol. 47, No. 2, 01.12.2008, p. 140-146.

Research output: Contribution to journalArticle

Fang, Tao ; Shimoyama, Yusuke ; Abeta, Toshio ; Iwai, Yoshio ; Sasaki, Mitsuru ; Goto, Motonobu. / Phase equilibria for the mixtures of supercritical methanol + C18 methyl esters and supercritical methanol + α-tocopherol. In: Journal of Supercritical Fluids. 2008 ; Vol. 47, No. 2. pp. 140-146.
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AU - Iwai, Yoshio

AU - Sasaki, Mitsuru

AU - Goto, Motonobu

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