CRITICAL CURVES IN MIXTURES OF CARBON DIOXIDE WITH ETHANE 
AND ETHYLENE BASED ON A GENERALIZED FLUCTUATION FORM 
OF THE VAN DER WAALS EQUATION OF STATE
V. B. Rogankov and E. D. Terzi

UDC 536.71 and 541.11

Critical curves of CO2-C2H4 and CO2-C2H6 
mixtures are investigated using a new fluctuation equation of state. 
Particular attention is paid to the behavior of thermodynamic 
sensitives in the vicinity of the critical azeotropic points, at which 
the derivative of the molar volume with respect to the composition, 
which has no special features in the vicinity of the critical points 
of the pure components, becomes zero. Reliable agreement between the 
results of describing the critical curves of the mixtures and the 
known (including volumetric measurements) experiment is obtained. 
Possible intensification of supercritical extraction in using the 
CO2-C2H6 mixture in the 
vicinity of the azeotropic point is predicted.

JEPTER7492020001
JEPTER749201