The Naked Scientists

The Naked Scientists Forum

Author Topic: Where does the carbon dioxide in fizzy drinks come from?  (Read 3975 times)

paul.fr

  • Guest
I know my cola has carbon dioxide in it, but how did it get there? Do they catch it from the air somehow?
« Last Edit: 18/09/2008 17:54:24 by chris »


 

Offline Madidus_Scientia

  • Neilep Level Member
  • ******
  • Posts: 1451
    • View Profile
Re: Where does the carbon dioxide in fizzy drinks come from?
« Reply #1 on: 18/09/2008 09:11:44 »
Its actually much cheaper for them to capture it straight from underground vents where it comes out under pressure, I believe. They would probably use too much energy trying to extract it from the air, or to clean the carbon dioxide output from a coal factory or something.
 

Offline BenV

  • Neilep Level Member
  • ******
  • Posts: 1503
    • View Profile
Re: Where does the carbon dioxide in fizzy drinks come from?
« Reply #2 on: 18/09/2008 10:04:14 »
I think they use excess co2 from other industrial applications (where co2 is used as a solvent)  I think that's how they decaffeinate coffee, so there would be plenty left over to pump into your cola.
 

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • Posts: 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Re: Where does the carbon dioxide in fizzy drinks come from?
« Reply #3 on: 18/09/2008 10:27:25 »
The original source was from brewing - although beer may not be fizzy now, the yeast produced lots of CO2 this was certainly used for the first fizzy drinks, I don't know if they source it from somewhere else these days.
 

The Naked Scientists Forum

Re: Where does the carbon dioxide in fizzy drinks come from?
« Reply #3 on: 18/09/2008 10:27:25 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums