Carbon dioxide used in supercritical processes is emitted as a reaction by-product from ammonia production and petroleum refining plants. This is collected and liquefied for reuse. However, because it is the final stage of emissions, it is probably considered a greenhouse gas emitter.
According to the method of calculating greenhouse gas emissions described in the materials of the Ministry of the Environment, for example, a person who collects carbon dioxide during the ammonia production process and provides carbon dioxide to others is not considered to be an emitter. On the other hand, when the carbon dioxide is reused (for example, dry ice production), it seems to be an emitter. Therefore, even when used in a supercritical process, it can be a emitter.