Performance and deactivation of Ir-based catalyst during hydroxylammonium nitrate catalytic decomposition

Authors: Rachid Amrousse, Toshiyuki Katsumi, Yosui Niboshi, Nobuyuki Azuma, Ahmed Bachar, Keiichi Hori

Abstract:
The catalytic performance of Ir-based catalyst for the decomposition of high energetic liquid propellant was investigated in a monopropellant thruster. The changes of ignition delay, catalyst bed temperature and chamber pressure with the numbers of pulse-injection were demonstrated to be effective signposts of catalyst bed efficiencies. The catalyst in fresh state and that after its deactivation were characterized by N₂-physisorption, XRD, H₂-chemisorption, TEM, H₂-TPR and XPS. It was noted that the particle distribution and oxidation state of iridium are the major indicators of catalyst deactivation. 

Keywords:
Thruster
Deactivation
HAN
Liquid propellant

Published in: Applied catalysis A: General  (Volume 452, Pages 1-222, 15 February 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Performance and deactivation of Ir-based catalyst during hydroxylammonium nitrate catalytic decomposition

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