Re: [PSUBS-MAILIST] CO2 Scrubber - and a cheap tester?!

[Coalbunny <coalbunny@vcn.com>]

You can make a sealed container really easy.  2x2's and plexiglas.  I
remember when a fella I was working with had a small lab in his
basement.  Instead of sealing off the basement (in the event of a
accident) he used heavy clear plastic rolls.  Like that stuff you tape
around your windows in the winter.  He had it all set up, and it was
nice.  Worked well.  A huge overkill on safety, but it would have
worked.  He was working with potassium cyanide and sodium thiosulfate in
gold recovery.
Carl


Warrend Greenway wrote:
> 
> Why don't you try it in a vaccum chamber? This sounds cool to me! If
> I get the chance I'll try it, but I'm pretty busy with the scrubber
> right now.
> 
> Warren.
> 
> > I'm interested!
> > Carl
> >
> >
> > emm03@mirapoint.uow.edu.au wrote:
> > >
> > > Ok!
> > > And while we are on the topic.....
> > > Has anyone yet had a chance to test out my fabulous - new -
> > > and - improved idea for testing CO2 levels in a confined area?
> > >
> > > It involves percolating ambient air through a solution
> > > containing phenyl red, which turns red in the presence of
> > > acid. And CO2 dissolved in water produces carbonic acid -> a
> > > wizzbang way to see if there is too much CO2 in the air.
> > >
> > > But...
> > > I dont have access to a small air-tight area similar to the
> > > inside of a sub, so I was hoping that someone could test it
> > > out (before diving!) for me?
> > >
> > > My preliminary tests of simply blowing into a glass
> > > containing this solution works fine, all I need is an idea of
> > > how sensitive it is! (which will be independant on the amount
> > > of phenyl red that is used..!)
> > >
> > > Anyone interested contact me please! I would really like to
> > > see how this works!
> > >
> > > thanks all.
> > >
> > > EM.
> > >
> > > ---- Original message ----
> > > >Date: Tue, 07 Jan 2003 06:57:35 +0800
> > > >From: "Warrend Greenway" <dub@linuxmail.org>
> > > >Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
> > > >To: personal_submersibles@psubs.org
> > > >
> > > >Because that's what I do every day of my life. I build
> > > things I really
> > > >could buy, and push technology. I come from a family of
> > > engineers. We don't
> > > >sit on our cheeks! We DO things. I needed an engine
> > > hoist...So my dad and
> > > >myself designed the best darn hoist you have ever seen and
> > > built it! We
> > > >could have actually bought a good enough hoist for less, but
> > > we wanted to
> > > >build it. That is the real reason I am interested in PSUBS.
> > > I will build my
> > > >hull, my instruments, my air recycling system, and my
> > > power/speed controller
> > > >circuitry. Why? Because that's the game! I will carefully
> > > test my system before
> > > >I use it, and if I can't make it function reliably then I
> > > won't use it. I might
> > > >even use the sofnolime blend just for fun, but I will still
> > > build my own waste-
> > > >heat rechargeable system to use it in. Besides it's mostly
> > > just fun to consider
> > > >the alternatives to standard systems. But I also see what
> > > you are saying. Building
> > > >everything is not for everyone. You may not have the time or
> > > interest. That's
> > > >fine.
> > > >
> > > >Warren.
> > > >
> > > >> Hi,
> > > >> I dont understand why you dont want to use the sofnolime
> > > specially designed
> > > >> for life support systems, do you want to make your own
> > > just to save $50 and
> > > >> risk your life.
> > > >> Amazing to see that every year divers die with market
> > > rebreathers, yet guys
> > > >> outhere are ready to dive in carboard sub and milk cartons
> > > rebreathers and
> > > >> try anything for the freedom of doing it.
> > > >> A "regular" sub is ALREADY difficult and tricky to put
> > > together, why even
> > > >> considere nuclear homemade sub, flying subs, propane subs,
> > > peroxyde subs,
> > > >> and other out of your mind submersible, did anyone tried
> > > telekinesis sub,
> > > >> warp sub,  or time travel sub, is there anyone left here
> > > who wants to build
> > > >> just a realistic sub?
> > > >> Herve
> > > >> ----- Original Message -----
> > > >> From: "Warrend Greenway" <dub@linuxmail.org>
> > > >> To: <personal_submersibles@psubs.org>
> > > >> Sent: Monday, January 06, 2003 1:03 PM
> > > >> Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
> > > >>
> > > >>
> > > >> > I understand why divers wouldn't want to, but I still
> > > do. I don't
> > > >> > see what the problem is. You simply have to properly
> > > granulate and
> > > >> > hydrate the calcium hydroxide. Furthermore, you can get
> > > the product
> > > >> > from chemical suppliers properly packaged and pure for
> > > less. I wouldn't
> > > >> > need of want the coloring agent. I would be using CO2
> > > analyzers on inlet
> > > >> > and exhaust to decide when to replace. Like I said
> > > though, the medium is
> > > >> > rechargeable. I don't think you would want to if you
> > > were talking short
> > > >> > range weekend diver...
> > > >> >
> > > >> > Warren.
> > > >> >
> > > >> > > At 09:52 AM 1/6/2003 +0800, Warrend Greenway wrote:
> > > >> > > >The basic scrubber will consist of a canister with
> > > two screens
> > > >> > >
> > > >> > > >calcium hydroxide is standard slaked or hydrated
> > > lime, available at any
> > > >> > > hardware
> > > >> > > >store for a few bucks a fifty pound sack.
> > > >> > >
> > > >> > > I've been on the "rebreather" listserv for a couple
> > > years since this is
> > > >> > > another interest of mine. You might enjoy this website-
> > > -
> > > >> > > http://www.atlimp.com/pend2.htm, although he is more
> > > serious with other
> > > >> > > projects - http://www.atlimp.com/home.htm
> > > >> > > other "famous" homemades -
> > > >> > > http://www.metacut.com/rebreathers/TP2000/Default.htm
> > > (this author died
> > > >> > > last month when the helicopter he was piloting crashed
> > > into NY
> > > >> waterfront
> > > >> > > at night- another dangerous activity),
> > > >> > > http://home1.gte.net/doctrbob/CCO2.htm,
> > > >> > > http://www.hrc.wmin.ac.uk:8080/xml/kiss/home,
> > > >> > > http://insel.heim.at/malediven/350052/english.htm
> > > >> > >
> > > >> > > I don't think any serious divers would use hardware
> > > store hydrated lime.
> > > >> > > The CO2 absorption depends on the exposure to the
> > > surface area of the
> > > >> > > sodalime "granules" and anyone who bets their life on
> > > such only
> > > >> purchases
> > > >> > > prepared "sodalime" from suppliers that have a
> > > consistant and reliable
> > > >> > > product. The sodalime is discarded and replaced in the
> > > scrubber for each
> > > >> > > dive. source -
> > > http://www.metacut.com/rebreathers//sofnolime.htm - this
> > > >> one
> > > >> > > changes color as product is used up.
> > > >> > >
> > > >> > > William Alford
> > > >> > > walford@dbtech.net
> > > >> > >
> > > >> > > Tout comprendre c'est tout pardonner
> > > >> >
> > > >> > --
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-- 
"You delight not in a city's seven or seventy wonders, but in an answer
it gives to a question of yours, or the question it asks you, forcing
you to answer, like Thebes through the mouth of the Sphinx." -- Kublai
Khan