Questions tagged [hydrogen-peroxide]

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8 votes
1 answer
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What is the propellant mass for the Soyuz descent module?

I learned some time ago that the Soyuz capsules use hydrogen peroxide as a monopropellant. I'm trying to use this fact for a chemistry question posed to my students, but I cannot find anywhere how ...
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2 votes
1 answer
65 views

Decomposing HTP through regenerative cooling for use in closed expander cycle

HTP or high test peroxide has a long history as a low cost and high reliability oxidiser, and has had a lot of recent attention for its pseudo hypergolic nature when passed over a catalyst bed. ...
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2 votes
0 answers
39 views

Designing a catalyst for use in catalytically hypergolic fuel mixtures using nitrous oxide

The use of hydrogen peroxide with hydrocarbons such as RP1 has long been a popular choice, not least of all for its hypergolic properties when paired with a catalyst bed. This motor design, catalysing ...
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4 votes
1 answer
451 views

If high-test peroxide is most stable when pure, why are most uses of it in rocketry at lower concentrations?

Per the Wikipedia article for High-test peroxide: Hydrogen peroxide becomes more stable with higher peroxide content. For example, 98% hydrogen peroxide is more stable than 70% hydrogen peroxide. ...
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1 vote
0 answers
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What is the O/F ratio of ethanolamine/H2O2?

I've just read this question What is the products of a catalyzed reaction between Hydrogen Peroxide and Ethanolamine with Copper(II) Chloride? and although its a very good question and an excellent ...
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2 votes
0 answers
49 views

What impact do inhibitants have on H2O2 performance?

How do the combustion characteristics, as well as the speed of decomposition, of inhibited hydrogen peroxide differ from those for pure H2O2. If a smoother combustion is achieved with pure hydrogen ...
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3 votes
1 answer
119 views

What is the products of a catalyzed reaction between Hydrogen Peroxide and Ethanolamine with Copper(II) Chloride?

I found this article about Hypergols, specifically H2O2. It mentions in table 3 and in the body of the paper that they found that Ethanolamine with Copper Chloride reacted vigorously. In my search for ...
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10 votes
6 answers
2k views

When has hydrogen peroxide been used in rocketry?

Peroxide is apparently a very good propellant, but I can't seem to find any instance of it being used. Has it ever been used and if not, why hasn't it? What's its downsides?
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  • 425
5 votes
1 answer
473 views

Does peroxide spontaneously decompose when introduced into hot combustion chambers?

I understand that hydrogen peroxide (HTP) can be decomposed into superheated steam and oxygen using a catalyst, but I haven't been able to find any information on whether or not it will decompose in ...
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10 votes
1 answer
2k views

Have there been rocket engines designed for diesel? What ISP theoretically possible?

Have there been rocket engines or even test engines that have used diesel as a fuel? If so, what oxidizer had they used and what ISP did they achieve? If not, is it possible to say what ISP is at ...
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19 votes
1 answer
755 views

What is the MXP-351 storable bipropellant?

Masten Space Systems has a proprietary hypergolic bipropellant called MXP-351 intended for use in the XL-1 lunar lander. We seem to know the following information: Non-cryogenic, with storage life of ...
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5 votes
1 answer
335 views

HTP as oxidizer for main propulsion

Please anyone elaborate why hydrogen peroxide is not used as an oxidizer for main propulsion. I see that everyone agrees on this but from my point of view its a big flaw. I think that industry has ...
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1 vote
1 answer
449 views

Can LOX containing hydrogen peroxide be used as an oxidizer for a liquid fueled rocket?

While searching the internet for designs on liquid fueled rocket engines, I noticed that some bottles of liquid oxygen say they contain some percentage of hydrogen peroxide. Could that be used as an ...
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  • 143
9 votes
3 answers
519 views

How easy is it to use liquid nitrogen dioxide as an oxidizer?

I was reading a similar question as mine here. But no one talked about nitrogen dioxide (NO2). Its boiling point is 21 °C, so it is easy to store. But how easy it is to handle compared to hydrogen ...
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  • 798
6 votes
3 answers
251 views

Hypergolic Propellant Combination

Is Rocket Grade Hydrogen Peroxide and Liquid Hydrogen a hypergolic propellant combination? I recall, seeing the combination somewhere on the www, however I couldn't retrace the source where I saw it.
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  • 481
14 votes
1 answer
1k views

Can a Soyuz-MS still propel itself back to earth if all its Hydrogen Peroxide decomposed?

In this answer it is stated that: If the fuel fully decomposes then return to Earth is still possible but only via ballistic descent I find it a little bit surprising, but maybe there is enough Δv ...
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19 votes
1 answer
1k views

Does the Soyuz spacecraft use chemically stabilized hydrogen peroxide (H₂O₂) to remain ISS-dockable for 200+ days?

Hydrogen peroxide (H2O2) from the local shop (dilute, 2-3%) sometimes has a stabilizer to slow its breakdown rate and increase its "shelf-life", since we'd like to keep it around the house on our ...
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