Catalytic Carbon - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Brew Science > Catalytic Carbon

Reply
 
Thread Tools
Old 05-07-2013, 08:03 PM   #1
Wynne-R
Recipes 
 
Aug 2009
Texas
Posts: 976
Liked 124 Times on 79 Posts



Quote:
Activated carbon does not adsorb chloramines but rather removes them through its ability to act as a catalyst for the chemical breakdown of chloramines to innocuous chlorides in water. This catalytic reaction involves the formation of a carbon oxide intermediate (CO*). This reaction is as follows:

NH2Cl + H2O + C* = NH3 + Cl- + H+ + CO*

2NH2Cl + CO*= N2 + 2Cl- + 2H+ + H2O + C*
http://www.wqa.org/pdf/techbulletins/tb-chloramine.pdf

Did yíall know this? Really? Nobody told me.

I tripped over this trying to find out what Ďcatalytic carboní is. It turns out theyíre all catalytic itís just that some are more catalytic than others with regard to chloramine.

 
Reply With Quote
Old 05-07-2013, 08:27 PM   #2
ajdelange
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Aug 2010
McLean/Ogden, Virginia/Quebec
Posts: 9,302
Liked 1499 Times on 1145 Posts


Yes, see http://wetnewf.org/pdfs/Brewing_arti...T_Chlorine.pdf pp 21-22.

I'm not sure I'd call it catalytic though as the carbon is actually oxidized by that first chloramine molecule and then subsequently reduced by the second 2. I guess you could call that catalysis.

 
Reply With Quote
Old 05-07-2013, 09:34 PM   #3
Wynne-R
Recipes 
 
Aug 2009
Texas
Posts: 976
Liked 124 Times on 79 Posts


Yeah, Iíve read that one, several times. I have a copy on my files. Good stuff.

It seems that even that little Britta pitcher filter worked pretty well. Iím guessing a good carbon block would be better. How much chloramine is too much?

I have been using a tiny amount of Campden in my filtered water. A pinch would be enough, wouldnít it? Something like 20 mg? I really canít tell the difference.

I donít know why carbon wouldnít be a catalyst. Itís in the reaction, but not in the final product.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
North Carolina Carbon Snake matt415 For Sale 0 03-29-2013 01:36 AM
How to carbon filter akurth7 Mead Forum 4 08-16-2011 12:02 PM
Carbon Fittings OK swanwick Equipment/Sanitation 3 04-26-2011 01:41 AM
Where's the carbon coming from? Fingers Recipes/Ingredients 1 05-02-2009 01:14 AM
Getting to much carbon Beertk General Techniques 3 02-06-2008 10:00 PM


Forum Jump