Beer mix gas, also known as beer gas or nitrogen gas blend, is a specially formulated mixture of nitrogen and carbon dioxide gases that is commonly used in the dispensing of draft beer from taps. This gas blend plays a vital role in ensuring that the beer is served with the appropriate level of carbonation and a smooth, creamy mouthfeel.
The nitrogen gas in the blend is responsible for creating the creamy texture and thick, cascading head that is often associated with beers like stouts and porters. When the beer is pushed through the tap using nitrogen, it creates small bubbles that give the beer a velvety smoothness and a visually appealing presentation. This is particularly desirable for beers with a higher malt content, as the nitrogen helps to accentuate the rich flavors and aromas.
On the other hand, carbon dioxide is a key component in maintaining the appropriate level of carbonation in the beer. It provides the necessary effervescence and crispness that many beer styles require. Carbon dioxide is also responsible for creating the carbonation and carbonic acid that contribute to the beer's overall flavor profile.
The ratio of nitrogen to carbon dioxide in the beer gas blend can vary depending on the desired outcome and the specific beer being served. Typically, the most common blend is known as a “70/30” mix, which consists of 70% nitrogen and 30% carbon dioxide. This blend is often used for beers that benefit from a smooth, creamy mouthfeel, such as stouts, porters, and nitro IPAs.
In certain cases, a higher nitrogen content may be desired, and a “60/40” or even a “50/50” mix can be used. These higher nitrogen blends are often employed for beers that require an extra level of creaminess, such as nitro cold brew coffee beers or specialty nitrogen-infused ales.
It's worth noting that the use of beer gas is not limited to nitrogen and carbon dioxide blends. Some establishments may opt for alternative gas mixtures, such as “60/30/10” blends that include a small percentage of argon gas. This can provide an even smoother mouthfeel and enhanced foam stability.
In my personal experience as a sommelier and brewer, I have found that the use of beer gas can greatly enhance the overall drinking experience. Beers served with the appropriate gas blend have a more pleasant and visually appealing presentation, with a smooth and creamy texture that complements the flavors and aromas of the beer.
Furthermore, the use of beer gas allows for greater control over the carbonation levels, ensuring that each beer is served at its optimal carbonation level. This is particularly important for beers with delicate flavors, as too much carbonation can overpower the nuances of the brew.
Beer mix gas is a carefully balanced blend of nitrogen and carbon dioxide gases that is used to dispense draft beer. It enhances the mouthfeel, appearance, and flavor profile of the beer, and allows for greater control over carbonation levels. The specific blend used can vary depending on the desired outcome and the beer being served.