http://www.micromatic.com/draft-keg-beer-edu/dispensing-beer-blended-gases-aid-119.html <div>During the past decade or so, utilizing a mixture of Carbon Dioxide (CO2) and Nitrogen (N) gasses for dispensing draft beer has become enormously popular at retail outlets such as bars, restaurants, pubs and major venues. Driving this popularity is the dispensing of stout or nitrogenated draft beers. </div>