“…Firstly, supercritical water (SCW) acts as a nonpolar solvent, which is able to be completely miscible with oxygen and organic materials. Therefore, intense oxidation reactions occurred in SCW, transforming the organic matters into N 2 , CO 2 , H 2 O, and inorganic salts in a short time [8]. Secondly, the strong heat release owing to the intense oxidation reaction is able to preheat the cold feedstock to a supercritical state again.…”