As long-distance human space travel becomes more realistic, the need for long-term storage of cryogenic propellants becomes a forefront issue. Effective cryo-fluid system management becomes a necessity to solve this issue. The fuel–oxidizer combination of choice for NASA’s Space Launch System is liquid hydrogen ( LH 2 ) and liquid oxygen (LOX). The current strategy used on many upper stage vehicles, including United Launch Alliance’s Advanced Cryogenic Evolved Stage, is to use the boil-off gases of the colder cryogen ( LH 2 ) to help insulate the warmer cryogen (LOX) and reduce the static boil-off. In this work, experimental measurements are collected for a range of catalyst materials and weight loadings of Fe 2 O 3 and RuO 2 catalysts on Nomex scrim blankets. The blankets are configured in a nonisothermal catalytic reactor with a 23 K input temperature and heated to 90 K output temperature. Results of catalyzation of parahydrogen to orthohydrogen gas are presented as well as a catalyzation model to represent the measurements for future use. In addition, simplified computational fluid dynamics studies have been initiated to estimate the surface-based conversion rate constant by matching numerical results and experimental data.


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    Title :

    Parahydrogen–Orthohydrogen Conversion on Catalyst-Loaded Scrim for Vapor-Cooled Shielding of Cryogenic Storage Vessels



    Published in:

    Publication date :

    2021-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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