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Evaluation of HAN-TEAN Stabilizers using MicrocalorimetryHAN-TEAN (hydroxylammonium nitrate - triethanolammonium nitrate - in water) is being considered for various propellant applications. This propellant has advantages in terms of insensitivity to impact and fire, low vapor pressure and environmentally benign reaction products. One office concerns with HAN-TEAN is its stability and shelf-life, especially when contaminated with trace metals. Stabilizer systems, consisting of anti-oxidants and/or chealating agents were investigated for their ability to control the decomposition of HAN-TEAN. Isothermal microcalorimetry, an ultrasensitive heat measurement technique, was used to monitor the decomposition of HANTEAN at near ambient temperatures. Isothermal microcalorimetry measures the heat flow from a reaction vessel into a surrounding heat sink. Microcalorimetry is approximately 1,000 times more sensitive than accelerating rate calorimetry (ARC) or differential scanning calorimetry (DSC) for measuring heat flow. Samples of HAN-TEAN containing the stabilizers were spiked with 50 ppm iron and the heat evolution monitored for a period of at least 30 days. Ten stabilizer combinations were tested and the rates of HAN-TEAN decomposition were lowered by 74 to 95 percent in the presence of iron.
Document ID
19970017920
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Hornung, Steven D.
(Allied-Signal Technical Services Corp. Las Cruces, NM United States)
Davis, Dennis D.
(Allied-Signal Technical Services Corp. Las Cruces, NM United States)
Chang, Craig H.
(Allied-Signal Corp. Des Plaines, IL United States)
Baker, David L.
(White Sands Test Facility Las Cruces, NM United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1997
Publication Information
Publication: The 1997 JANNAF Propellant Development and Characterization Subcommittee and Safety and Environmental Protection Subcommittee Joint Meeting
Volume: 1
Subject Category
Nonmetallic Materials
Accession Number
97N20031
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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