Volumetric and Phase Behavior of Mixtures of Nitric Oxide and Nitrogen Dioxide

Abstract

The compositions of the coexisting phases of No-NOsub2 mixtures were established through the 2-phase region for temperatures above 70 deg F and for compositions containing over 80 wt-% NOsub2. The specific volumes of the liquid and gas phases of the oxide mixtures were determined between 40 deg and 340 deg F at pressures up to 7000 psi. The bubble-point pressures of the oxide mixtures containing up to 20 wt-% NO were below 300 psi at 160 deg F; the pressures were sufficiently low to permit the use of conventional storage and handling techniques under most climatic conditions. The specific volume changed almost linearly with isobaric-isothermal changes in composition in the liquid and gas phases; the results could be interpolated for desired composition. The data agreed with those on the volumetric and phase behavior of the pure components.