Thermal conductivity measurement of n-butane over wide temperature and pressure ranges

✍ Scribed by C. A. Nieto de Castro; R. Tufeu; B. Neindre

• Publisher: Springer
• Year: 1983
• Tongue: English
• Weight: 882 KB
• Volume: 4
• Category: Article
• ISSN: 0195-928X
• DOI: 10.1007/bf00504479

✦ Synopsis

The thermal conductivity of n-butane has been measured by a coaxial-cylinder method over a pressure range from 0.1 MPa up to 70 MPa and a temperature range from room temperature to 600 K, covering all fluid states. The estimated accuracy of the method is about 2%. Special emphasis has been given to the behavior of the thermal conductivity near the critical point, and the critical enhancement has been studied for 3.6 K < AT < 176 K. The effect of inelastic collisions upon transport properties of the dilute gas has been discussed. The results obtained for the reduced critical enhancement as a function of the reduced critical temperature confirm the universality of the critical exponent, for the n-alkanes, whereas the reduced excess thermal conductivity outside the critical region is a function of the reduced density and of the n-alkane.