heksogen
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experiment?
Some time ago i have seen a "chemist show" made by some students. One of their experiments was putting some KMnO4 to a flask containing some
30%H2O2 solution. The mixture imidiately started fuming. Once I also made this experiment. The result was the same and I noticed the flask was very,
very hot. What was the reaction???
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Saerynide
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| Quote: | Originally posted by madscientist
KMnO4 oxidizes H2O2 readily, causing both to decompose... I have tried adding two or three grains of KMnO4 to a test tube 1/4 of the way filled with
27.5% H2O2, and the result was a violent, hot, oxygen gas / steam forming reaction. All that was left was some very hot water, and Mn3O4 (I believe
that's what the dark brown precipitate was).
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hodges
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You can get a similar decomposition reaction with other catalysts and hydrogen peroxide. For example, potassium iodide. The decomposition of
hydrogen peroxide liberates heat, and the reaction also occurs faster at high temperatures. Like a fire, it is self-sustaining. I believe some model
rockets used or still used plain hydrogen peroxide as fuel with a catalyst. The steam produced by the heat of decomposition provides the necessary
thrust.
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axehandle
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| Quote: |
I believe some model rockets used or still used plain hydrogen peroxide as fuel with a catalyst. The steam produced by the heat of decomposition
provides the necessary thrust.
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I'd wish. You would have to turn to NASA for data on that.
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vulture
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It's possible and has been done before.
>60% H2O2 (this is the tough part) is being dripped/pumped through a silver mesh or a MnO2 contact bed.
The produced oxygen can be used to burn a hydrocarbon in an afterburner stage.
[Edited on 11-5-2004 by vulture]
One shouldn't accept or resort to the mutilation of science to appease the mentally impaired.
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Tacho
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| Quote: | Originally posted by vulture
It's possible and has been done before.
>60% H2O2 (this is the tough part) is being dripped/pumped through a silver mesh or a MnO2 contact bed.
The produced oxygen can be used to burn a hydrocarbon in an afterburner stage.
[Edited on 11-5-2004 by vulture] |
Can I use MnO2 over and over again or does it get consumed somehow?
I'm thinking of small beads made of MnO2 and some binder as a permanent catalyst.
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vulture
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Your MnO2 won't be consumed as it acts as a catalyst.
Your binder must be H2O2 resistant.
[Edited on 11-5-2004 by vulture]
One shouldn't accept or resort to the mutilation of science to appease the mentally impaired.
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