[PSUBS-MAILIST] charcoal filter

Sun Feb 4 04:51:36 EST 2018

Thanks Rick,
haven't been able to find much information on CO2/charcoal combo
scrubbers. Saw this one...
http://www.comanex.fr/details-co2+scrubbers-63.html
but it is two separate canisters sharing the same fan.
As you say it is looking like putting the two in line is not the done thing.
Perhaps a separate activated charcoal unit that you just turn on
when needed.
Alan

Sent from my iPad

> On 3/02/2018, at 4:03 PM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> In our sat systems, our charcoal “fart scrubber” canisters were separate from the soda sorb canisters for some reason, cross contamination?
>  I would tend to have the charcoal down stream if you were going to combine them just so there was no way any charcoal dust could inhibit the efficiency of the medium. 
> Rick 
> 
>> On Fri, Feb 2, 2018 at 2:22 PM Stephen Fordyce via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Yes, I think that's a reasonable line of thinking.
>> 
>> Steve
>> 
>>> On Sat, Feb 3, 2018 at 11:19 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> Thanks Steve,
>>> I haven't started my scrubber design, but it shouldn't be too
>>> far away. I presume the carbon would go in the intake side to
>>> avoid the moisture that's a bi-product of scrubbing.
>>> Alan
>>> 
>>> Sent from my iPad
>>> 
>>>> On 3/02/2018, at 12:59 PM, Stephen Fordyce via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> 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
>>>>>>> > 
>>>>>>> > _______________________________________________
>>>>>>> > Personal_Submersibles mailing list
>>>>>>> > Personal_Submersibles at psubs.org
>>>>>>> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>>>> >
>>>>>>> 
>>>>>>> _______________________________________________
>>>>>>> Personal_Submersibles mailing list
>>>>>>> Personal_Submersibles at psubs.org
>>>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>>>> _______________________________________________
>>>>>>> Personal_Submersibles mailing list
>>>>>>> Personal_Submersibles at psubs.org
>>>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>>> _______________________________________________
>>>>>> Personal_Submersibles mailing list
>>>>>> Personal_Submersibles at psubs.org
>>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>> 
>>>>> _______________________________________________
>>>>> Personal_Submersibles mailing list
>>>>> Personal_Submersibles at psubs.org
>>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>> 
>>>> _______________________________________________
>>>> Personal_Submersibles mailing list
>>>> Personal_Submersibles at psubs.org
>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>> 
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180204/4a1bf06b/attachment.html>