[PSUBS-MAILIST] charcoal filter

[Stephen Fordyce via Personal_Submersibles]

Hi guys,
I can't see any particular issues with adding activated carbon to your
scrubber (and it's used as the final filtration in most SCUBA compressor
filters) so long as you avoid dust.  One thing to be mindful of is that
it's a fuel and shouldn't see high oxygen concentrations.  If you wanted to
be really fancy, you could also add some "hopcalite"/"monoxycon", which is
a granular catalyst to convert carbon monoxide into carbon dioxide (also
used in SCUBA compressor filtration).

Alan, I have Lawrence Factor (high grade breathing-air) activated carbon
and hopcalite in Australia already if you need some, but I think you would
find them in NZ.

Cheers,
Steve Fordyce

On Sat, Feb 3, 2018 at 10:41 AM, Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Sorry forgot link, (getting old)
> https://www.amronintl.com/comex-lung-powered-carbon-
> dioxide-co2-scrubber.html
> Alan
>
>
> Sent from my iPad
>
> On 3/02/2018, at 11:47 AM, Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Just doing a quick Google I came across this lung powered CO2
> scrubber that has a carbon filter in it as well. The addition of
> the carbon filter mustn't restrict the flow too much especially
> as it's a lung powered device.
> Alan
>
> Sent from my iPad
>
> On 3/02/2018, at 10:39 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Steve,
> I have proper absorbent coming and will do another life support test with
> both scrubbers for two people and will test the charcoal affect.
> Hank
>
> On Friday, February 2, 2018, 2:09:40 PM MST, Steve McQueen via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Yes I have a scrubber from Emile. However, I reduced it's stock height to
> mount vertically. I am planning on testing the charcoal configuration as
> part of the scrubber tests. Would be interested in hearing any
> results/observations you eventually have.
> Thanks,
> Steve
>
> ---- hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
> >  Steve, I agree, I figure with my radial scrubber witch is also my
> manual backup scrubber.  I would put the charcoal at the bottom, witch
> makes it contact the air first.  My reasoning is if there is smoke in the
> sub, it will get cleaned up first ahead of the Soda Sorb.  If I recall you
> have a scrubber from Emile?  so the same would apply.  Hank
> >    On Friday, February 2, 2018, 11:37:27 AM MST, Steve McQueen via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> >
> >  Hank, I was thinking the same.  In my mind as long as the scrubber
> media in the reduced capacity (80%) is understood and acceptable I can't
> see any issues with this combined process. Maybe the charcoal should be
> first?
> >
> > Thanks,
> > Steve
> >
> > ---- hank pronk via Personal_Submersibles <personal_submersibles at psubs.
> org> wrote:
> > > Hi All,Okay maybe crazy idea.  I want a charcoal  air filter in Gamma
> and in the interest of keeping it simple.  I though I could fill my
> scrubber with CO2 absorbent to say 80% then place a screen barrier and
> finish filling with  activated charcoal.  Thoughts?Hank
> >
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