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

Paper ID Volume ID Publish Year Pages File Format Full-Text
40494 45856 2013 5 PDF Available
Title
Performance and deactivation of Ir-based catalyst during hydroxylammonium nitrate catalytic decomposition
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.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (313 K)Download as PowerPoint slideHighlights► Uniform distribution of nano-size iridium particles into the alumina before test. ► Deactivation of iridium catalyst after HAN decomposition. ► Deactivation phenomena was caused by oxidation of iridium. ► Severe sintering of iridium catalyst after HAN decomposition reaction.

Keywords
Thruster; Deactivation; HAN; Liquid propellant
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Performance and deactivation of Ir-based catalyst during hydroxylammonium nitrate catalytic decomposition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 452, 15 February 2013, Pages 64–68
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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