High-temperature chemistry of stored-chemical energy reactions for propulsion. Annual report, 25 May 1985-31 December 1986

Technical Report · Wed Jul 01 00:00:00 EDT 1987

OSTI ID:6096304

Cook, L P; Plante, E R; Bonnell, D W; Hastie, J W

This report summarizes the results of a continuing study of the high-temperature chemistry of stored-chemical-energy reaction systems. Thermogravimetric studies were completed on the behavior of aluminum oxide and magnesium oxide in the presence of C10/sub 3/F. Based on these data, a new ceramic containment systme comprised of alumina and magnesia parts allowed extension of kinetic experiments from the 650 C limit previously encountered to a temperature in excess of 800 C. Using the new apparatus, the authors observed the relative inertness of the Al component of the fuel to oxidation by ClO/sub 3/F even at 800 C. They also noted the extensive vapor-phase transport of lithium fluoride and magnesium flouride not expected on the basis of known thermodynamic data. Thermogravimetric experiments were completed on the oxidation of molten aluminum droplets by ClO/sub 3/F. Rate data for this reaction indicate multiple mechanisms, possibly including the following steps: (1) nucleation and growth of AlF/sub 3/ precipitation sites; (2) edge growth of AlF/sub 3/ islands followed by coalescence of islands; (3) diffusion limited thickening of the AlF/sub 3/ layer. Observations on the early stages of the Al/ClO/sub 3/F reaction have also been made using high-pressure-sampling transpiration mass spectrometry.

• Research Organization: National Bureau of Standards, Washington, DC (USA). Ceramics Div.
• OSTI ID: 6096304
• Report Number(s): AD-A-183010/8/XAB; NBSIR-87-3601
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ENERGY STORAGE
CHEMICAL REACTIONS
COALESCENCE
FLUORIDES
FUELS
HIGH TEMPERATURE
KINETICS
LIQUID METALS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
MAGNESIUM OXIDES
NUCLEATION
OXIDATION
OXIDES
PHASE STUDIES
REACTION KINETICS
THERMODYNAMICS
TRANSPORT
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
ELEMENTS
FLUIDS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LIQUIDS
LITHIUM HALIDES
MAGNESIUM COMPOUNDS
METALS
OXYGEN COMPOUNDS
STORAGE
250800* - Energy Storage- Chemical