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HAN and ADN as liquid ionic monopropellants: Thermal and catalytic decomposition processes

Paper ID Volume ID Publish Year Pages File Format Full-Text
46269 46436 2012 8 PDF Available
Title
HAN and ADN as liquid ionic monopropellants: Thermal and catalytic decomposition processes
Abstract

Binary HAN and ADN aqueous solutions have been synthesized, then thermally and catalytically decomposed. Binary HAN mixtures were prepared with different concentrations: 95, 80 and 60 wt.%. Whereas ADN solution contains are: 75, 60 and 50 wt.%. The candidate catalysts were prepared by impregnation of alumina doped by lanthanum oxide with active phase precursors: iridium for HAN and copper oxide for ADN and characterized by transmission electron microscopy, X-ray diffraction and chemisorption. The decomposition processes were followed by thermal analysis and a constant batch reactor. This work shows the essential effect of monopropellant concentrations to determine the best green propellants for industrial applications as reaction control systems. Moreover, HAN and ADN solutions are more efficient for catalytic decomposition due to the absence of stabilizer to inhibit catalysts. The (10%)Ir/Al2O3–La2O3 + HAN95% and the (10%)CuO/Al2O3–La2O3 + ADN75% associations show lower decomposition temperatures, larger reaction rates and leads to higher amount of gas phase products, giving the most efficient systems.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Best results are obtained for the most concentrated HAN and ADN solutions. ► Good catalytic activity is demonstrated by low decomposition temperature. ► Fast reaction rate and large amount of products allow to choice the best catalyst. ► Best catalyst/monopropellant combinations: Ir-based/HAN95% and CuO-based/ADN75%.

Keywords
Monopropellant; HAN; ADN; Catalytic decomposition process
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HAN and ADN as liquid ionic monopropellants: Thermal and catalytic decomposition processes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 121–128
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us