Sodium chlorate electrolytic cell electrocatalytic electrode material supplier
Advantages of titanium anode over traditional graphite electrode:
(1) The solution of graphite anode and lead anode can be overcome, and the pollution of electrolyte and cathode products can be avoided, so the purity of metal products can be improved.
(2) Titanium anode has a long working life. In the chlor-alkali industry produced by diaphragm method, the metal anode is resistant to chlorine and alkali corrosion. The anode life has reached more than 6 years, while that of graphite anode is only 8 months.
(3) It can avoid the short circuit problem after the lead anode deformation, thus can improve the current efficiency.
(4) The current density can be improved. In the production of chlor-alkali by diaphragm method, the working current density of graphite anode is 8A/dm2, and that of titanium anode can be doubled to 17A/dm2. In this way, under the same conditions of electrolytic workshop and electrolytic cell, the output can be doubled, the production capacity of single cell is improved, and the labor production efficiency is effectively improved. Titanium anode is suitable for electrolysis at high working current density.
(5) The high temperature and high current density operation of chlorate electrolytic cell is possible due to the use of metal anode. The use of metal anode can improve the structure of electrolytic cell, reduce the consumption of electric energy, accelerate the chemical reaction of hypochlorite gas chlorate, and improve the production performance.
(6) The design concept and operating conditions of salt electrolyzer using DSA, mercury method and diaphragm method can be improved and the energy consumption can be reduced. The low overpotential characteristic of DSA and the easy removal of bubbles on the surface of the electrodes are the important reasons for the voltage reduction of the metal anode electrolytic cell.
Because of its many advantages, the development of titanium anode has brought great economic benefits to the chlor-alkali industry, so it was soon popularized and used all over the world. Chlor-alkali production capacity, the world about 41 million tons/year, the use of titanium anode is not less than 70%, titanium anode is known as a major technical revolution in the chlor-alkali industry. Subsequently, titanium anode has also been widely used in many electrolysis industries.
(7) The anode size is stable, and the distance between electrodes does not change during the electrolysis process, which can ensure that the electrolysis operation is carried out under the condition of stable cell voltage.
(8) The switch is easy to make, can be high precision.
(9) The titanium anode light weight, can reduce the labor intensity.
(10) The matrix metal titanium can be used repeatedly.
(11) Strong corrosion resistance, can work in many corrosive, special requirements of the electrolytic medium.
(12) The working voltage is low, so the power consumption is small, the power consumption can be saved and the DC power consumption can be reduced by 10% ~ 20%.
Main reasons for low working voltage of titanium anode:
1) The overpotential of active coating titanium anode to chlorine and oxygen is low. The overpotential of titanium anode to chlorine is lower than that of graphite anode at 1A/cm2, and is 140mV lower than that of titanium anode at 1A/cm2.
2) The "bubble shielding effect" can be reduced. The bubbles generated on the surface of the metal anode are relatively small and escape quickly. In this way, the inflatability between the electrodes is greatly reduced. The ohm drop between the poles is about 700mV, and the bubble diameter is about 3mm.
3) The resistance of the anode structure is reduced.
4) Shortening the distance between poles.
In the 1960s, the world salt electrolysis industry consumed about 150 billion kilowatt-hours of electricity per year, and the use of metal anode could save about 300 million kilowatt-hours of electricity per year.
(13) With the advent of metal anodes, the design and industrialization of ionic membrane electrolysis technology, which has recently emerged in the chlor-alkali industry, can be realized.
(14) In chlor-alkali production, after using titanium anode, the product quality is high, chlorine gas purity is high, does not contain CO2, alkali concentration is high, can save heating steam, save energy consumption.
