So it may be just me to whom this idea is new, but a paper recently out in Angew. Chem. describes the preparation of high purity
H2O2 using a reasonably simple looking reactor. It uses quite reasonable power and temperature to generate a plasma which makes
the H2O2 from H2 and O2. Their design apparently allows for much safer operation, too, by allowing much
greater O2 concentrations without the thing exploding!
I've only really had time for a quick skim over of the paper, so I may be missing something that makes it completely amateur-unfriendly. In any case,
the paper is attached for anyone interested.
Safe Direct Synthesis of High Purity H2O2 through a H2/O2 Plasma Reaction
Yi et al., Angewandte Chemie International Edition, 2013, 52(32), 8446–8449
That's an interesting paper. If only they'd included a drawing of their aqueous electrode construction - it sounds like it's a free liquid surface
operating as an electrode.watson.fawkes - 21-8-2013 at 16:33
If only they'd included a drawing of their aqueous electrode construction
It's in the supporting
information. First go to the URL for the DOI, http://doi.org/10.1002/anie.201304134, which redirects to the publisher's page. Click on the tab in the middle of the page called "Supporting
Information". See the link labelled anie_201304134_sm_miscellaneous_information.pdf. The first two figures are schematics of the reactor.Gooferking Science - 21-8-2013 at 17:13
Cool! Thanks for sharing that with us. I have found it difficult to concentrate Hydrogen peroxide through boiling, or rather, making it slowly
evaporate, below boiling temp to evaporate the water, and not the peroxide.ziqquratu - 21-8-2013 at 17:20
Yeah, sorry about that - I intended to include the supporting info file, but it was too large, and then I forgot to update my post with the link.
Thanks for that, watson!VitaminX - 5-9-2013 at 11:25
Cool! Thanks for sharing that with us. I have found it difficult to concentrate Hydrogen peroxide through boiling, or rather, making it slowly
evaporate, below boiling temp to evaporate the water, and not the peroxide.
You might wanna try freezing the water and thereby concentrating commonly available 6% h2o2. 12AX7 - 6-9-2013 at 10:10
I can't tell what a CTP-2000K does, electronically (yay for Chinese test equipment..), but it's some sort of high voltage corona generator. Probably
a flyback transformer (the old AC kind, not the modern integrated DC kind) or Tesla coil would do a good job. Neon sign transformer might not be
enough, but if you want to try this and you have one, go ahead and see if it works.
Be interesting if this can be done with a standard condenser -- attach a second water jacket over the water jacket proper, run the reaction through
the middle water jacket, HV in the center, ground the outer. Or if you already have a triple-coaxial glass piece of some sort, give that a try.
Tim
[Edited on 9-6-2013 by 12AX7]watson.fawkes - 6-9-2013 at 11:38
