Home Brew Forums > Home Brewing Beer > Brew Science > Oxidation - a real concern?
Reply
 
Thread Tools
Old 02-05-2013, 08:46 PM   #11
ajdelange
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: McLean/Ogden, Virginia/Quebec
Posts: 7,901
Liked 1079 Times on 845 Posts
Likes Given: 33

Default

Think about this for a minute. You have 1 atm absolute in the keg. You pressurize to 2 atm gauge which is 3 atm absolute with CO2. You have, then .2 atm O2, 0.8 atm N2 and 2 atm CO2. You bleed down to 1 atm which gives you 0.2/3 atm O2, 0.8/3 N2 and 2.0/3 CO2. Pressurize to 2 atm gauge again and bleed down again and you have 0.2/3/3 atm O2, 0.8/3/3 and the rest CO2. Do it again and its 0.2/3/3/3 = 0.007 atm i.e. 0.7% O2 still in the keg. To beat this some fill the keg with water and push that out with CO2. I fill the keg with steam in order to sterilize it and circulate that steam for 15 min (these are Sankeys). At the completion of sterilization the keg is disconnected under pressure from the steam source and connected to a CO2 bottle. As the steam condenses it is replaced by CO2. Excess CO2 then pushes the condensate out.


ajdelange is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cause for concern joeynar1977 General Beer Discussion 7 02-04-2013 11:32 PM
oxidation concern beerhound28 Beginners Beer Brewing Forum 7 11-22-2011 08:40 PM
First "Real" All-Grain brew going real well so far [knock on wood] DRoyLenz General Beer Discussion 4 02-15-2010 03:58 AM
Cause for concern? graham515 Bottling/Kegging 1 10-21-2008 06:42 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS