Solubility of Tetrafluoromethane in the Ionic Liquid [hmim][Tf2N]

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• 作者：Jacek Kume//pubs.acs.org/images/entities/lstrok.gif" border="0">an ; &Aacute ; lvaro Pé ; rez-Salado Kamps ; Dirk Tuma ; Akimichi Yokozeki ; Mark B. Shiflett ; Gerd Maurer
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：March 13, 2008
• 年：2008
• 卷：112
• 期：10
• 页码：3040 - 3047
• 全文大小：107K
• 年卷期：v.112,no.10(March 13, 2008)
• ISSN：1520-5207

文摘

Experimental results for the solubility of tetrafluoromethane (CF₄, R14) in the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([hmim][Tf₂N]) are presented for temperatures between293.3 and 413.3 K, at pressures (gas molalities) up to 9.6 MPa (0.22 mol kg^-1). The experimental resultswere determined with a high-pressure view-cell technique operating on the synthetic method. The experimentaldata were used to determine Henry's constant of tetrafluoromethane in [hmim][Tf₂N]. The results for theHenry's constant (at zero pressure) are correlated (on the molality scale) within the experimental uncertainty(i.e., about 1.1%) by ln(nals/jpcbfk/112/i10/eqn/jp076737te10001.gif">/MPa) = 7.537 - 893.8/(T/K) - 0.003977(T/K). Henry's law was alsoextended to describe the gas solubility at higher pressures. Furthermore, a cubic equation of state was usedto correlate the gas solubility over the entire range of experimentally investigated temperature and pressure.Both methods proved suited for a reliable correlation of the new experimental data.