High pressure densities of carbon dioxide + Dipentaerythritol (cas 126-58-9) hexaheptanoate: New experimental setup and volumetric behavior
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Add time:09/29/2019 Source:sciencedirect.com
To perform an appropriate selection of the lubricants in air conditioned systems working with carbon dioxide as refrigerant, the thermodynamic behavior of the CO2 + lubricant systems must be well known. In this work we present a new setup to prepare compressed gas–liquid mixtures and to determine the high pressure density by using an automated densimeter HPM and two syringe pumps. To analyze the reliability of the procedure proposed, we have determined the densities and mixing volumes of four CO2 + n-decane mixtures. We have found a good agreement with previous literature data. In addition new density values are reported for the binary system CO2 + dipentaerythritol hexaheptanoate (DiPEC7) at several temperatures and pressures from 10 MPa to 120 MPa.
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