Abstract
The handling hazard associated with the potential explosibility of mixtures of solid oxygen with high-pressure gaseous hydrogen provided the incentive for the phase equilibria and thermodynamic study which is reported in this paper. The specific concern is with the behavior of oxygen which is present as a trace impurity (concentration of a few parts per million) in a high-pressure hydrogen stream which is being cooled. Oxygen crystallizes during the cooling process when the saturation concentration of oxygen is reached. The exact temperature depends upon the total pressure and the oxygen concentration; for low concentrations, the temperature is below the triple point temperature of -361.8°F. The possibility always exists that solid oxygen may concentrate in heat exchangers and other process components which are at temperatures lower than the triple point. Even at very low concentrations, the oxygen may accumulate and cause hazardous conditions. The data on the solid—vapor equilibria of the oxygen—hydrogen system are, therefore, of considerable value for the safe design and operation of hydrogen liquefaction equipment.
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McKinley, C., Brewer, J., Wang, E.S.J. (1962). Solid—Vapor Equilibria of the Oxygen—Hydrogen System. In: Timmerhaus, K.D. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 7. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-0531-7_14
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DOI: https://doi.org/10.1007/978-1-4757-0531-7_14
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