From what FMC told us is the ~ anhydrous HTP had a lower decomp. rate than
the 90%, the theory was that the water in lower concentrations acted as a
mild catalyst.
Ken
On Thu, Apr 20, 2023 at 5:30 PM John Dom <dmarc-noreply@xxxxxxxxxxxxx>
wrote:
The 90 % HTP (super pure) used as monopropellant for braking the Soyuz
capsules prior/during landing is (or was) produced by EVONIK in Antwerp,
Belgium. Next it is shipped to Germany for final purification and transport
to Russia.
There are several Soyuz capsules attached to the ISS for station
emergencies.
All have HTP aboard. Since the peroxide concentration diminishes with age
I wonder how long it is allowed to stay up there. I have no idea.
John
Verzonden vanuit Proximus Mail
Van: John Schilling <john.schilling@xxxxxxxxxxxxxx>
Verzonden: 21 april 2023 00:54:24 CEST
Aan: arocket@xxxxxxxxxxxxx
Onderwerp: [AR] Re: arocket Digest V11 #72
FMC sold their peroxide operation to Peroxychem; we were able to buy a
batch of nominally 98% from them back in 2018-2019. Tested out at 97% when
we got it IIRC, somewhat less than that in 2022 when we actually launched.
But Aerospace Corporation has a government contract and a reputation for
safety, so I don't know whether they'd be willing to sell to amateurs,
small businesses, etc.
John Schilling
On 4/19/2023 8:28 AM, Ben Brockert wrote:
Benchmark (includes some ex-Masten people) and reportedly Rocket Lab
are both doing peroxide for in-space propulsion. I don't think either
test at FAR, but there does seem to still be a supply chain for it. I
haven't asked if FMC ever got around to making another batch, the
peroxide I used back in the day was nominally 90% that was closer to
85% because it had sat around for so many years.
On Wed, Apr 19, 2023 at 5:52 PM Ian M. Garcia <ian@xxxxxxxxxxxxx> wrote:
Thanks! I know Paul Breed used to work with peroxide, so I thought
initially this may be some of his, but it didn't look like it.
This looks like a recent video, so maybe Ventura is doing something with
peroxide?
I was just curious. This looks like high percentage peroxide which IIRC
takes effort to produce, so somebody is deliberately making it.
--
Ian M Garcia
________________________________
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> on
behalf of Keith Batt <dmarc-noreply@xxxxxxxxxxxxx>
Sent: Wednesday, April 19, 2023 10:34 AM
To: arocket@xxxxxxxxxxxxx <arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: arocket Digest V11 #72
Who is working with peroxide at FAR these days?
--
Ian M Garcia
The video quoted shows a logo for Ventura Energy Systems, and if I recall
(it’s been a few decades) that was Mark Ventura in the video. The Ventura
Energy Systems website shows some images of testing at the FAR site.
I don’t know others currently working with Peroxide. Paul Breed had been
with his lander project, but that work has ceased.
Keith
--
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