High solubility and partial molar volume of 2,2′-oxybis(N, N -bis(2-methoxyethyl)acetamide) in supercritical carbon dioxide

Zhen Yang, Hai Jian Yang, Jia Tian, Cun Yue Guo, Hakwon Kim

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18 Citations (Scopus)

Abstract

2,2′-Oxybis(N,N-bis(2-methoxyethyl)acetamide) was synthesized and confirmed by IR, NMR, and elemental analysis. The solubility of this compound was measured at temperatures ranging from (313 to 333) K and pressures from (9.2 to 15.2) MPa in supercritical carbon dioxide. The synthesized compound showed high solubility in supercritical CO2 at easily accessible temperatures and pressures (e.g., 1.84 × 10-3 mol·L -1 at 9.2 MPa and 313 K). To confirm the tested solubility, the density-based correlations proposed by Bartle and Chrastil were investigated for the synthesized compound. The results showed good self-consistency of the data calculated using the Bartle semiempirical equation, which differed from the measured values by between (0.96 and 41.22) %. Better agreement with the experimental solubility data was obtained with the Chrastil model, for which average absolute relative deviations of less than 6 % were observed. The solubility data were also used to estimate the partial molar volume V̄2 for the compound in the supercritical phase using the theory developed by Kumar and Johnston.

Original languageEnglish
Pages (from-to)1191-1196
Number of pages6
JournalJournal of Chemical & Engineering Data
Volume56
Issue number4
DOIs
Publication statusPublished - 14 Apr 2011

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