What is wet catalytic oxidation?

wet oxidation method, abbreviated as WAO, was first put forward by American F.J.Zimmermann in 1944, and it was used for papermaking black liquor, and many patents were obtained, so it was also called zimmermann method. Under high temperature and high pressure, the organic matter in wastewater is oxidized into carbon dioxide and water by oxidant, so as to achieve the purpose of removing pollutants. Subsequently, the oxidation process has developed rapidly, and its application scope has further expanded from the recovery of useful chemicals and energy to the treatment of toxic and harmful wastes.

the wet oxidation method is a technology that generally uses oxygen or air as oxidant at high temperature (15-35℃) and high pressure (5-2MPa) to oxidize dissolved or suspended organic matter or reduced inorganic matter in water to generate small molecular substances such as carbon dioxide and water. Generally, there are two steps: ① the mass transfer process of oxygen in air from gas phase to liquid phase; ② Chemical reaction between dissolved oxygen and matrix.

catalytic wet oxidation technology: in order to improve the treatment efficiency and reduce the treatment cost, wet oxidation technology based on WAO, which uses efficient and stable catalyst, was derived in 197s, that is, catalytic wet oxidation technology, abbreviated as CWAO.

The technology of adding catalyst to the traditional wet oxidation treatment system to reduce the activation energy of the reaction, thus reducing the reaction temperature and pressure without reducing the treatment effect, and using oxygen or air as oxidant to oxidize dissolved or suspended organic matter or reduced inorganic matter in water to generate small molecular substances such as carbon dioxide and water.