Deoxidizer is a chemical used to remove dissolved oxygen from water. Its main working principle is to reduce the dissolved oxygen content in water by reacting chemically with oxygen dissolved in water, converting oxygen into other substances.
The following are several common deoxidizers and their working principles:
Sulfite (sodium sulfite, sodium bisulfite): Sulfite ions react with oxygen to form sulfate ions and water. The reaction equation is: SO3 ^ 2-+O2 → SO4 ^ 2-
High temperature deoxidizers (such as peroxides): At high temperatures, peroxides decompose to produce oxygen free radicals. These oxygen free radicals can react with oxygen dissolved in water, converting it into water. The specific reaction mechanism depends on the type of peroxide used.
Catalyst: The deoxidizer may contain a catalyst, which can accelerate the reaction rate between oxygen and other substances, thereby promoting the deoxygenation process.
Deoxidizers are usually added in water treatment systems and can effectively convert or remove dissolved oxygen in water with sufficient contact time. This helps to reduce the adverse effects of oxygen in water on some process processes, such as boilers and cooling systems, and prevent the occurrence of metal corrosion and biological growth issues.
It should be noted that the use of deoxidizers should be evaluated based on the specific application environment and water quality, and used under appropriate conditions. At the same time, the residue or conversion products of the deoxidizer may require further treatment to ensure that the water quality meets relevant standards and requirements.