New measurements of the amount-of-substance density of pure CH4 in the temperature range 322 K to 700 K at pressures from 5 MPa to 35 MPa are reported. The results have been obtained by using a fully automated isochoric instrument and their uncertainty is estimated to be about 20.05 per cent at the
Thermal conductivity of N2, CH4 and CO2 at room temperature and at pressures up to 35 MPa
โ Scribed by A.A. Clifford; J. Kestin; W.A. Wakeham
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 433 KB
- Volume
- 97
- Category
- Article
- ISSN
- 0378-4371
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โฆ Synopsis
The thermal conductivity of gaseous nitrogen, methane and carbon dioxide has been measured at room temperature and at pressures up to 35 MPa in the cases of nitrogen and methane and up to 5 MPa in the case of carbon dioxide. A transient hot-wire technique was used, which has been described previously. The curves of thermal conductivity versus density for all three gases are found not to be expressible as a polynomial expansion, which is probably due to changes in energy-relaxation behavior with pressure. In the case of carbon dioxide, which was studied close to its critical temperature, some vestiges of anomalous behavior associated with the critical point can be seen. Accurate Eucken factors for the three gases are given. In the case of nitrogen, the experimental value is found to be somewhat below recent predictions.
๐ SIMILAR VOLUMES
Densities of dilute aqueous solutions of CH4, CO2, H2S, and NH3 were determined experimentally at temperatures ranging from 298.15 K to 705 K and pressures to 35 MPa by means of a vibrating tube densitometer. Appropriate techniques were developed for preparation, storing, and handling of solutions a
New measurements of the amount-of-substance density of pure gaseous CO2 in the temperature range 329 K to 698 K at pressures from 3 MPa to 34 MPa are reported. The results have been obtained by using a fully automated isochoric instrument and their average uncertainty is estimated to be about 20.05