The difference between CO2 tap and Nitro tap lies in the gases used to dispense beer and the resulting characteristics of the beer itself. As a sommelier and brewer, I have had the opportunity to work with both CO2 and Nitro taps and have experienced firsthand the unique qualities each method brings to the beer-drinking experience.
CO2, or carbon dioxide, is the most commonly used gas for dispensing beer. It is highly soluble in liquids, meaning it easily dissolves into the beer, creating a high level of carbonation. When CO2 is used to dispense beer, it produces larger bubbles that quickly rise to the top of the glass. This leads to a more effervescent and lively mouthfeel. The carbonation also helps to release the aromatic compounds in the beer, enhancing its aroma and flavor.
On the other hand, Nitro, or nitrogen, is less soluble than CO2 and does not easily absorb into the liquid. When nitrogen is used to dispense beer, it creates smaller bubbles that rise more slowly to the top of the glass. This results in a creamy and smooth mouthfeel, almost velvety in texture. The nitrogen bubbles also contribute to a thick and stable foam head, which adds to the aesthetic appeal of the beer.
The choice between CO2 and Nitro taps depends on the desired characteristics of the beer. Beers that benefit from a crisp and refreshing mouthfeel, such as lagers and pale ales, are often served through CO2 taps. The lively carbonation complements the clean and crisp flavors of these beer styles.
On the other hand, beers that are known for their smooth and creamy texture, like stouts and porters, are typically served through Nitro taps. The nitrogen bubbles create a luxurious mouthfeel that enhances the rich and velvety flavors of these dark and robust beers.
It is worth noting that some beers can be served on both CO2 and Nitro taps, allowing customers to experience different variations of the same beer. For example, a brewery may offer their stout on both CO2 and Nitro taps, providing customers with the option to choose between a more carbonated and lively version or a smoother and creamier version of the same beer.
The difference between CO2 and Nitro taps lies in the gases used to dispense the beer and the resulting characteristics of the beer itself. CO2 creates larger bubbles, leading to a more effervescent mouthfeel, while Nitro produces smaller bubbles, resulting in a creamy and smooth texture. The choice between CO2 and Nitro taps depends on the desired mouthfeel and characteristics of the beer being served.