Aerojet ran their monolithic cat pack on 90% through a less than .5"
cat pack and got 100% decomp after stat-up.
A quote from the Aerojet report.
"An exhaustive test series to determine the life of monolithic
catalyst beds has not been performed.
However, on NASA's ISTAR program, a single catalyst bed was used for
the entire test series. The
catalyst bed endured 678 seconds of testing at a throughput of 0.62
lbs/in2 and 238 seconds at 0.67
Ibs/in2. There wen 55 starts (full thermal cycles) without any
measurable change in performance."
Robert
Robert
At 11:24 AM 9/18/2016, you wrote:
On Sat, 17 Sep 2016, Jonathan Goff wrote:
... an MMC powder that has the matrix be a metal that is a good peroxide catalyst, but using the reinforcement ceramic particles to give it an adequate softening temperature.
The matrix in a composite needs to hold the material together, so it can't be too soft at the working temperature.
Probably not--isn't high test peroxide just below the melting point of
silver? Or am I misremembering (I've always been a LOX guy).
Really high test peroxide is slightly above the melting point of silver, in fact, and even lower grades can be close enough to have problems. You can go to platinum and its relatives, but they're fine all by themselves, apart from the small matter of cost.
Perhaps you could turn it around, though: use some reasonably heat-resistant non-catalytic metal as the matrix, and something like MnO2 as the ceramic.
Henry
