Accession Number:

AD0261913

Title:

HYDROGEN GENERATION FOR HIGH ALTITUDE BALLOONS

Descriptive Note:

Corporate Author:

METAL HYDRIDES INC BEVERLY MASS

Personal Author(s):

Report Date:

1961-06-14

Pagination or Media Count:

1.0

Abstract:

Based on efficiency, weight, volume, and cost per charge, CaH2, pelleted NaAlH4, and NaBH4 were the most promising materials for the development of a H generating charge. LiAlH4 was substituted for NaAlH4 for large-scale testing. CaH2 and pelleted LiAlH4 were scaled up to give 42 cu ft of H smoothly and efficiently within 30 min, using the standard ML-303TM generator. Manifolds of 4 and 6 charge cans of each of these materials were tested successfully to generate 168 and 252 cu ft of H. Accelerated aging tests indicated a questionable shelf life for LiAlH4. Because it is water-soluble, NaBH4 required an enclosed generator. Efficient generation from NaBH4 required a catalyst, preferably CoCl2. The foaming which accompanied generation was controlled by addition of a small amount of gum turpentine. As the turpentine sometimes decelerates the reaction, amines or alcohols were used to accelerate the generation rate. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE