Supercritical fluids – so much more than decaffeinating coffee If you’re in science, you may have heard about supercritical fluids in your physical chemistry class. If you’re not, we’ll get you up to speed. The example most often cited for the use of supercritical carbon dioxide is for decaffeinating coffee, replacing the old method which used toxic chemicals. That is only one use. There are so many more! It’s like asking what you can use water for… You can use…