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The speed of sound in two methane-rich gas mixtures at temperatures between 250 K and 350 K and at pressures up to 20 MPa

✍ Scribed by M.F. Costa Gomes; J.P.M. Trusler

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 132 KB
Volume: 30
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1998.0378

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✦ Synopsis

The speed of sound has been measured in two methane-rich gas mixtures having nominal Ž . Ž compositions of 0.85CH q 0.15C H and 0.80CH q 0.10N q 0.05C H q 0.03C H q 4 2 6 4 2 2 6 3 8

. 0.02CO . The measurements were made with a spherical acoustic resonator on four 2 isotherms at TrK s 250, 275, 300, and 350 and at pressures between p s 0.1 MPa and p s 20 MPa. The final results for the two mixtures have an estimated overall uncertainty of "0.03 per cent. The speeds of sound in the limit of zero pressure have been estimated by extrapolation and the results generally agree with calculated values to within "0.01 per cent.

The experimental values for the speed of sound are compared with the predictions of the 1992 AGA8 equation of state. The results do not differ by more than 0.2 per cent at temperatures above T s 275 K but deviations of up to 1 per cent are found on the isotherms at T s 250 K.

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