ISSN:
1572-9567
Keywords:
alkane
;
correlation
;
decane
;
dodecane
;
heptane
;
hexane
;
octane
;
thermal conductivity
;
transient hot-wire method
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Experimental data on the thermal conductivity of five liquid n-alkanes-hexane, heptane, octane, decane, and dodecane-are presented in the temperature range from 283 to 373 K at pressures up to 250 MPa or the freezing pressures. The measurements were performed on an absolute basis by an automated transient hot-wire apparatus. The uncertainty of the reported data is estimated to be within ±1%. The thermal conductivity of each alkane decreases almost linearly with rising temperature at a constant pressure and increases with increasing pressure at a constant temperature. Both the temperature coefficient of the thermal conductivity ¦(∂λ/∂T) p¦ and the pressure coefficient (∂λ/∂P) T decrease with increasing carbon number of alkanes. The experimental results were correlated with temperature and pressure by a similar expression to the Tait equation. It is also found that both the dense hard-sphere model presented by Menashe et al. and the modified significant structure theory proposed by Prabhuram and Saksena provide good representations of the present experimental results.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00513075
