Interesting. Critical pressure is 1,070 psi at 87.8 F. Some heavy wall pressure vessels are required and heavy duty compressors. Sounds expensive.
I have a unit in our lab. It’s heavy but the process is quite easy.
It’s the equipment that costs a lot of money.
Once you’ve set up the remaining cost is heated water and carbon dioxide, which isn’t expensive and there’s no chemical waste (until OSHA or the EPA regulates the daylights out of it, to save the Erf)