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Critical Properties of Four HFE + HFC Binary Systems:  Trifluoromethoxymethane (HFE-143m) + Pentafluoroethane (HFC-125), + 1,1,1,2-Tetrafluoroethane (HFC-134a), + 1,1,1,2,3,3,3-Heptafluoropropane (HFC-227ea), and + 1,1,1,2,3,3-Hexafluoropropane (HFC-236ea)

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College of Science & Technology, Nihon University, Kanda-Surugadai 1-8-14, Chiyoda-ku, Tokyo 101-8308, Japan, National Institute of Advanced Industrial Science and Technology, Nanotechnology Research Institute, Higashi 1-1-1, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan, Daikin Industries, Ltd., Umeda-Center Building, 2-4-12, Nakazaki-Nishi, Kita-Ku, Osaka 530-8323, Japan and National Institute of Advanced Industrial Science and Technology, Research Center for Developing Fluorinated Greenhouse Gas Alternatives, Higashi 1-1-1, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
Cite this: J. Chem. Eng. Data 2004, 49, 6, 1615–1621
Publication Date (Web):October 22, 2004
https://doi.org/10.1021/je0499723
Copyright © 2004 American Chemical Society
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    Abstract

    Trifluoromethoxymethane (CF3OCH3, HFE-143m) is a promising alternative for dichlorodifluoromethane (CCl2F2, CFC-12) as a refrigerant. Because of its low flammability, it is expected to be used in binary mixtures with inflammable hydrofluorocarbons (HFCs). In this study, we measured the critical parameters of binary mixtures of HFE-143m with four HFCspentafluoroethane (CHF2CF3, HFC-125), 1,1,1,2-tetrafluoroethane (CH2FCF3, HFC-134a), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), and 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea). The uncertainties were ±10 mK in temperature, ±0.5 kPa in pressure, ±1 kg m-3 in density, and ±0.5% in composition (molar base). The HFCs were selected for the similarities of their normal boiling points. The experimental data were correlated with equations proposed by Higashi.

    †

     Nihon University.

    ‡

     National Institute of Advanced Industrial Science and Technology.

    §

     Daikin Industries, Ltd.

    *

     Corresponding author. E-mail:  [email protected]. Phone:  +81-298-61-4567 or +81-298-61-4819. Fax: +81-298-61-4567.

    ‖

     National Institute of Advanced Industrial Science and Technology.

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