Surface tension of propane–methane solution in the temperature range of 318.15–333.15 K

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We presented the results of measuring of the capillary constant of a propane-methane solution along the saturation line in the temperature range of 318.15–333.15 K at pressures from the saturation pressure of pure propane up to 4 MPa. The surface tension of the solution was determined. Equations approximating the concentration and pressure dependences of surface tension are constructed.

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M. Khotienkova

The Institute of Thermal Physics of the Ural Branch of the Russian Academy of Sciences

Email: andbaeva@mail.ru
俄罗斯联邦, Ekaterinburg

V. Andbaeva

The Institute of Thermal Physics of the Ural Branch of the Russian Academy of Sciences

编辑信件的主要联系方式.
Email: andbaeva@mail.ru
俄罗斯联邦, Ekaterinburg

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2. Fig. 1. Baric dependence of the capillary constant (a) and concentration dependence of the surface tension (b) of the propane-methane solution according to isotherms. (1 – T = 318.15 K; 2–323.15; 3–328.15; 4–333.15).

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3. Fig. 2. Deviations of experimental data on the surface tension of the propane-methane solution from those calculated by equation (7) (a) and deviations of experimental data on the surface tension of the propane-methane solution from those calculated by equation (8) (b). (1 – T = 318.15 K; 2 – 323.15; 3 – 328.15; 4 – 333.15.)

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4. Fig. 3. Critical line of the propane-methane solution: 1 – [15]; 2 – [14]; 3 – [16]; 4 – [4], 5 – [17], dotted line – data calculated using equation (17).

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5. Fig. 4. Deviation of experimental data on the capillary constant of a propane-methane solution from additive values calculated using equation (16): T = 318.15 K – solid line; 323.15 K – dashed line; 328.15 K – dotted line; 333.15 K – dashed-dotted line.

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