Shell-405 Catalyst Improvement.
Abstract
The objective of this program was to develop an improved Shell-405 catalyst with increased multiple ambient-start capability for spontaneously decomposing hydrazine in order to meet future Air Force satellite requirements on monopropellant attitude control engines. Experimental catalysts were evaluated to determine ambient-start life in 5-lb thrust hydrazine engines. In the first phase of the program different substrate materials were investigated in an effort to find a catalyst support that is better than Reynolds RA-1 alumina, the current standard. Although many of the other tested substrates exhibited potentially beneficial physical properties, Reynolds RA-1 clearly remains the best catalyst support for extended ambient-start usage. In the second phase of the program, differences in the catalyst manufacturing technique were further evaluated with this substrate. An above-standard active-metal loading in the range of 35% to 45% iridium offers the greatest promise for increasing catalyst life. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1974
- Accession Number
- AD0786455
Entities
People
- Neil C. Newton
- Ronald J. Meetin