CO2 Process

When certain gasses are compressed above certain critical pressures and critical temperatures (73 bar/1059 psi and 88 degrees Fahrenheit in the case of carbon dioxide), they are known as supercritical gas fluids, exhibiting traits of both gas and liquid. In both of these processes, supercritical carbon dioxide is combined with the beans, where it combines with the caffeine. The carbon dioxide is then isolated and filtered to remove the caffeine. In carbon dioxide process this is done with activated charcoal; in sparkling water process, the carbon dioxide is mixed with water, which filters out the caffeine.