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capture vinyl chloride on permangate-impregnated carbon?

bbch (Chemical) (OP)
9 Oct 07 15:39
Does anyone have experience with this application.  It's from a soil-vapor extraction process.  Good or bad experience appreciated.  Names of suppliers welcome.

Thank you.
moltenmetal (Chemical)
27 Nov 07 7:29
Where's the water going to come from if you're planning to do this in the vapour phase?  Doesn't permanganate need to be dissolved to react effectively with anything?  I'd be surprised if you got a solid-phase reaction between adsorbed vinylchloride and permanganate, but testing would prove it one way or the other. Vinylchloride adsorbs to such low mass percentages on carbon that a simple sorption capacity test would tell you all you needed to know.

One word of caution when dealing with carbon:  when sorption capacities are low, you need to buy more carbon than you expected and hence the carbon suppliers make more money.  So unless there's a performance guarantee, there's little consequence to the carbon suppliers if they over-predict the sorption capacity of your sorbate on their carbon.  There's always an excuse for why the sorption capacity is lower than predicted, and sometimes of course these are reasons rather than excuses (other sorbates being present etc.).  

If someone is selling this permanganate-doped stuff specifically for VCM, get them to treat the gas on a toll charge basis for you rather than simply buying carbon every time the beds are exhausted.  Otherwise you (or your client) are simply on the hook once you've bought into this thing.

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