Initial investigation of catalyst pack for 98 %+ hydrogen peroxide satellite monopropellant thruster

This study aimed to assess the decomposition rate of highly concentrated hydrogen peroxide on catalyst samples, based on the various materials and the geometry of the supporting structures. The drop test method was used and involved delivering a droplet of hydrogen peroxide to a catalyst sample in a sealed chamber, and then measuring the pressure rise. Different sample groups showed various pressure increase rates, indicating differences in catalytic performance. The drop tests were followed by a material investigation to compare the morphology of the active layer produced on various substrates and the effects of the high-test peroxide (HTP) interaction with the surface after the tests. Qualitative tests of phase composition and chemical composition were also performed. Different substrates resulted in varying morphology based on material type, chemical composition, and porosity. The study was treated as a screening test to choose the best catalytic pack option for testing under thruster-like conditions. • Closed chamber drop test method as a screening test for catalyst pack investigation. • Support material of the catalyst pack influences the decomposition dynamics. • Support material of the catalyst pack influences the sample degradation.