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Aluminum borohydride ammines as fuels for hybrid rocket motors: theoretical performance and particle synthesisThe aluminum borohydride ammines, Al(BH4)3·XNH3, are a family of complexes between aluminum borohydride and ammonia for which up to six moles of ammonia can be complexed per mole of aluminum borohydride. Two of these complexes, the diammine (X = 2) and hexammine (X = 6) are of particular interest for use in hybrid rocket motors as particle additives and stand alone fuels. This study compares these compounds against other metal hydrides for their potential to increase the regression rate of solid fuel grains. The theoretical performance of the diammine as a stand alone fuel paired with non-toxic oxidizers is also investigated. The low temperature and good performance of these combinations make them of interest for low cost orbital maneuvering thrusters. Finally, results on the synthesis of Al(BH4)3·6NH3 and its thermal characterization are presented.
Document ID
20220008127
Acquisition Source
Marshall Space Flight Center
Document Type
Presentation
Authors
David L. Drewniak
(Pennsylvania State University State College, Pennsylvania, United States)
J. Eric Boyer
(Pennsylvania State University State College, Pennsylvania, United States)
Richard A. Yetter
(Pennsylvania State University State College, Pennsylvania, United States)
Date Acquired
May 24, 2022
Subject Category
Propellants And Fuels
Meeting Information
Meeting: 2022 Joint Army-Navy-NASA-Air Force (JANNAF) Meeting
Location: Newport News, Va
Country: US
Start Date: June 6, 2022
End Date: June 10, 2022
Sponsors: United States Air Force, United States Army, United States Department of the Navy, National Aeronautics and Space Administration
Funding Number(s)
CONTRACT_GRANT: 80NSSC21K1283
Distribution Limits
Public
Copyright
Use by or on behalf of the US Gov. Permitted.
Technical Review
Single Expert
Keywords
hybrid rockets
ALUMINUM BOROHYDRIDE AMMINES
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