Classic Chlorine Dioxide Generator Techniques

Electrochemical:

25% NaOCl (Sodium hypochlorite) + energy

2NaClO2 + 2H2O + Energy → 2ClO2 + 2NaOH + H2

Explained: Electricity is getting two parts of Sodium hypochlorite (2NaClO2) plus 2 part of water (2H2O) reacting and the result are 2 parts of Chlorine dioxide (2ClO2), 2 parts of Sodium hydroxide (2NaOH) and Hydrogene (H2).

Disadvantages: Sodium hypochlorite is high corrosive and harmful to the environment. Constant powersupply is needed for keeping the process running.

Acid / Chlorite:

7.5% NaClO2 (Sodium chlorite) + 9% HCl (Hydrochloric acid) alternatively 25% NaClO2 + 33% HCl

5NaClO2 + 4HCl → 4ClO2 + 5NaCl + 2H2O

Explained: Five parts of Sodium chlorite (5NaClO2) and four parts of Hydrochloric acid (4HCl) are reacting to four parts of Chlorine dioxide (4ClO2), five parts of Sodium chloride (5NaCl) also known as salt and two parts of Water (2H2O).

Disadvantages: Sodium chlorite is oxidising (boosting fire) highly poison and in general harmful to the environment. Hydrochloric acid is verry corrosive.

Chlorite / Chlorine:

25% NaClO2 (Sodium chlorite) + Cl2 (Chlorine gas)

2NaClO2 + Cl2 → 2ClO2 + 2NaCl

Explained: Two parts of Sodium chlorite (2NaClO2) and Chlorine gas (Cl2) are reacting to two parts of Chlorine dioxide and two parts salt (NaCl)

Disadvantages: Sodium chlorite is oxidising, highly poison, in general harmful to the environment. Chlorine gas is extremely poison (In World War I it was the first used chemical mass destruction weapon).

25% NaClO2 (Sodium chlorite) + NaOCl (Sodium hypochlorite) + HCl (Hydrochloric acid)

2NaClO2 + NaOCl  + 2HCl → 2ClO2 + 3NaCl

Explained: Two parts of Sodium chlorite (2NaClO2) plus Sodium hypochlorite (NaOCl) plus two parts of Hydrochloric acid (HCl) are reacting to two parts of Chlorine dioxide (2ClO2) and three parts of salt (3NaCl)

Disadvantages:  Sodium chlorite is oxidising, highly poison, in general harmful to the environment. Sodium hypochlorite is high corrosive and harmful to the environment. Hydrochloric acid is verry corrosive.

Chlorite / Peroxide / Acid:

25% NaClO2 (Sodium chlorite) + H2O2 (Hydrogen peroxide) + H2SO4 (Sulfuric acid)

2NaClO2 + H2O2 + H2SO4 → 2ClO2 + O2 + Na2SO4 + 2H2O

Explained: Two parts of Sodium chlorite (2NaClO2) plus each one part of Hydrogen peroxide (H2O2) and Sulfuric acid (H2SO4) are reacting to two parts of Chlorine dioxide (2ClO2), Oxygen (O2), Sodium sulfate (Na2SO4) and two parts of water (2H2O)

Disadvantages: Sodium chlorite is oxidising, highly poison, in general harmful to the environment. Hydrogen peroxide is oxidising and corrosive, is  thermodynamically unstable and decomposes. Sulfuric acid is high corrosive especially to organic materials.