Les caracteristiques de l'emploi apres les etudes superieures

Thanks to its attractive advantages, hydrazine is the most widely used monopropellant in chemical liquid propulsion. In spite of its good performance, the use of hydrazine involves major risks for handling and environment, inducing high costs. Therefore, a new class of energetic ionic liquids has been studied. They comprise an oxidizer, a reducer and water as solvent. The purpose of this work was to study the thermal and the catalytic decomposition of some ionic oxidizers in aqueous solution such as HAN, AN,ADN and HNF. The decomposition study was followed by thermal analysis, batch constant volume reactor and dynamic flow reactor-mass spectrometer. The gaseous products were analysed by mass spectrometry, whereas the condensed products were analyzed by Raman spectroscopy and acid-base titration in order to establish a balanced equation of the thermal or catalytic decomposition of propellants. The catalyst Pt/Al2O3Si developed in our laboratory for HAN-water decomposition presents a low catalytic activity toward ADN-water, HNF-water and AN-water mixtures. In this aim, other mono- and bimetallic catalysts based on Pt, Fe, Cu and Zn were prepared and tested to decompose these mixtures