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Performance And Deactivation Of Ir/γ-Al2O3 Catalyst In The Hydrogen Peroxide Monopropellant Thruster

Hanjing Tian, T. Zhang, Xiaoying Sun, Dongbai Liang, L. Lin
Published 2001 · Chemistry

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The performance of ir/gamma -al2o3 catalyst for the decomposition of high concentration hydrogen peroxide was investigated in a monopropellant thruster. the changes of ignition delay (t(0)), chamber pressure (p-c) and catalyst bed temperature (t-c) with the numbers of startup-shutdown cycles were proved to be effective indicators of catalyst bed efficiency. the fresh catalyst and the deactivated catalyst were characterized with h-2-tpr, xrd and xps. it was found that catalyst oxidation and surface sn poisoning are the major reasons of catalyst deactivation. (c) 2001 elsevier science b.v. all rights reserved.
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