ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Experimental isobaric heat capacity and differential latent heat measurements have been made on the helium-nitrogen system. Compositions studied were nominal 5, 25, 50, and 100% helium in nitrogen over the range 0 to 2,000 lb./sq.in.abs. and -250° to 50°F.These data, combined with the previously reported work on nitrogen and the Joule-Thomson coefficients of Roebuck, are used to construct the complete pressure-enthalpy-composition network over the investigated limits of pressure and temperature.The enthalpies obtained from experimental heat capacity and Joule-Thomson data are compared with enthalpies computed from PVT data. The changes of phase determined by differential latent heat measurements are compared with literature vapor-liquid equilibrium data.This information is used to prepare pressure-enthalpy diagrams for all the mixtures investigated. A three-dimensional representation of the data on a pressure-enthalpy-composition diagram is presented. Constructions are outlined from which heats of mixing and partial molal enthalpies can be obtained.The thermodynamic network developed is believed accurate within 1% and should be of use to those concerned with low-temperature separation of helium from nitrogen.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690120126
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