triplepoint
Hazard to Others
Posts: 127
Registered: 11-4-2012
Location: U.S.
Member Is Offline
Mood: in equilibrium
|
|
Charcoal as dessicant?
I just received a package that included two large dessicant bags. They are Unit Paks from Desiccare. They are 8 unit milspec, according to the
labelling, which basically means that each one is rated to absorb 8 oz of water. My first thought was what I would do with that much silica. My 2nd
thought was to look up the composition before I opened anything. According to the company's website, of is either silica, clay or perlite. The site
said that charcoal, while not a dessicant, may be mixed in for odor control. I opened a bag and, you guessed it from the title of the post, it was
100% charcoal. Is charcoal a dessicant? Was this a manufacturing mix-up or what? No harm was done, but there is clearly something wrong with this
picture.
|
|
|
Hexavalent
International Hazard
Posts: 1564
Registered: 29-12-2011
Location: Wales, UK
Member Is Offline
Mood: Pericyclic
|
|
Are you absolutely certain that it was actually just charcoal; I have used charcoal previously with other stuff added and it was still very dark.
"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
|
|
|
bbartlog
International Hazard
Posts: 1139
Registered: 27-8-2009
Location: Unmoored in time
Member Is Offline
Mood: No Mood
|
|
So, how did you verify that it was 100% charcoal? I would expect mixed perlite and charcoal to be really hard to tell apart from just charcoal.
The less you bet, the more you lose when you win.
|
|
|
triplepoint
Hazard to Others
Posts: 127
Registered: 11-4-2012
Location: U.S.
Member Is Offline
Mood: in equilibrium
|
|
I certainly could be wrong. It is uniformly composed of jet (or coal) black irregularly shaped granules. I examined some of the pieces closely with
my naked eye - not microscope. They appear to be charcoal. I broke open some pieces and they were all uniformly jet black inside. It is not just
staining from proximity to charcoal. Of course zeolite (not perlite as I said earlier) could look similar. I am a beginner in lab procedures, but I
am looking for a qualitative test that I could use to confirm or exclude the presence of zeolite. I have found this one but I do not think I can
recreate it with my limited knowledge and setup. I'll keep looking.
http://www.minsocam.org/ammin/AM58/AM58_1044.pdf
|
|
|
Endimion17
International Hazard
Posts: 1468
Registered: 17-7-2011
Location: shores of a solar sea
Member Is Offline
Mood: speeding through time at the rate of 1 second per second
|
|
Burn the granules in a stream of air. If it's pure charcoal, very little residue will be left.
Activated charcoal has some desiccant properties, but it's used mainly for absorbing other molecules, as it's quickly saturated with water vapor.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
