There are currently two main types of catalysts based on their types and performance requirements: precious metal catalysts, which have good activity and stability, and mature technology. However, due to the high price of precious metals and resource shortages, they have not been industrialized; The other type is non-metallic catalysts. Mainly focused on transition metal oxide catalysts and complex oxide catalysts (calcium titanium type complex oxides and spinel type complex oxides). At present, finding non precious metal catalysts with abundant sources, low cost, and comparable performance to replace traditional precious metal catalysts for catalytic combustion processes has become an important direction.

Activated carbon adsorption catalytic combustion equipment is a purification method that uses catalysts to oxidize and decompose pollutants in exhaust gas at lower temperatures. So, catalytic combustion is also known as catalytic chemical conversion. Due to the acceleration of the oxidation decomposition process by the catalyst, most hydrocarbons can be oxidized through the catalyst at temperatures of 300-450 ℃. Compared with the thermal combustion method, catalytic combustion requires less auxiliary fuel, consumes less energy, and has smaller equipment and facilities. However, the promotion and application of this method in industrial production processes have been affected by issues such as catalyst poisoning, high cost of replacing and cleaning the catalytic bed.

The activated carbon adsorption catalytic combustion equipment mainly consists of a heat exchanger, combustion chamber, catalytic reactor, heat recovery system, and exhaust chimney for purifying flue gas. The purification principle is that the unpurified gas is preheated by a heat exchanger before entering the combustion chamber, and then sent to the combustion chamber to reach the required reaction temperature. The oxidation reaction is carried out in the catalytic reactor, and the purified flue gas releases some heat through the heat exchanger before being discharged into the atmosphere through the chimney.

When designing activated carbon adsorption catalytic combustion equipment, the following aspects should be considered:

1. The airflow and temperature are evenly distributed. To achieve uniform airflow and temperature distribution across the catalyst surface, and to prevent direct flame contact with the catalyst surface, the combustion chamber should have sufficient length and space. The catalytic combustion device should have good insulation effect. The furnace body is generally lined with refractory materials on the outer shell of the steel structure, or with a double-layer sandwich wall structure.