Reactor Structure for the Decomposition of ADN-Based Monopropellant

Ammonia dinitramide (ADN)-based liquid monopropellants are considered to be environmentally friendly alternatives the toxic and carcinogenic hydrazine-based propellants. Hence, Space Solutions Co., Ltd. is developing a 1N ADN-based monopropellant thruster by conducting combustion performance in different types of reactors. Various parameters, such as preheating temperature size thermal catalyst beds, were examined. The results showed that decomposition propellant Pt-LHA bed, which was used Type-1 reactor, resulted insufficient at low temperatures. Furthermore, increasing led partial reaction propellant, but efficiency due disintegration catalyst. However, when bed (STS ball) addition (Pt-LHA) Type-2 Type-3 reactors, improved, with minimal pressure drop 0.2 bar. It also confirmed not damaged even after repeated operations. In conclusion, this study suggests needs vaporize before decomposing on achieve optimal efficiency.