Highly concentrated H2O2 preparation, stabilization and decomposition over manganese oxide-based catalysts for space propulsion
A.B. de Roos (TU Delft - Aerospace Engineering)
Matteo Monai – Mentor (Universiteit Utrecht)
Botchu Vara Siva Botchu – Mentor (TU Delft - Space Systems Egineering)
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Abstract
High concentration hydrogen peroxide (HP) promises to be an economical and green alternative for hydrazine. However, it has only limited storage life, and addition of stabilizers must be avoided to preserve the high purity required for propellants. This work has investigated the mechanical fastening of normally dissolved stabilizers on the decomposition of HP.
Furthermore, there is currently no suitable ignition system for HP-ethanol rocket motors, despite extensive research. This work has investigated the viability of using a supported catalyst to decompose HP; the hence liberated heat can potentially be used to ignite ethanol. Different mechanically rigid ceramic catalyst bodies were prepared based on manganese oxide. Their reactivity was verified by repeated release of 98% HP droplets; the subsequent reaction was monitored with thermocouples and high speed imaging. This showed that γ-alumina offered the highest reactivity and thermomechanical stability. Lastly, tests showed that these catalysts may induce ignition in HP-ethanol engines.