HYDROGEN GENERATION FOR HIGH ALTITUDE BALLOONS
Abstract
During this report period ninety small and large scale tests (up to 270 cu ft H2 STP) were run. Data obtained from these tests enabled the design and packaging of fifty NaBH4, fifty NaAlH4 charges and the design and fabrication of a test model Hydrogen Generator (Model XI). Two runs with the test model hydrogen generator were conducted, each reacting three NaBH4 charges and evolving the required 135 cu ft H2. Parameters investigated during this period included the forming pressure and physical packaging technique of large and small quantities of NaBH4; and the mixing of various amounts and combinations of catalysts These efforts were primarily directed toward obtaining a uniform hydrogen generation rate from NaBH4. The best package developed was a 550 gm NaBH4 charge containing 40 gm LiH, 11 gm CoCl2 pressed in a 3 in. x 8 7/8 in. canister. A uniform H2 generation rate has been achieved with NaAlH4. Shelf life tests indicated NaBH4 samples stored at 50 C gave lower yields than fresh control samples and required a longer time for H2 evolution. The NaAlH4 runs showed no significant differences from similar fresh controls.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1963
- Accession Number
- AD0406210
Entities
People
- M. J. Mcgoff
- R. A. Spencer
- W. J. Carter