VOCs catalyst

What are VOCs catalysts?

VOCs are volatile organic compounds, usually Volatile organic compound produced in petrochemical, paint, solvent, printing, glue, home decoration and other industries. It is one of the main components of air pollution and has a serious impact on the environment and health. In order to reduce the emission of VOCs, VOC catalysts have been widely used.

VOC catalyst is a type of catalyst used for the degradation of VOCs, which is supported by Dong Qingshi and mainly composed of precious metals and rare earth elements; Adopting a unique method of high dispersion and uniform distribution to prepare and shape, it is the most efficient organic waste gas purification catalyst. By catalytic oxidation or reduction reactions, VOCs are converted into harmless substances such as water and carbon dioxide, thereby reducing environmental pollution and health risks.

What are the types of VOCs catalysts?

VOCs catalysts are mainly divided into metal catalysts, non-metallic catalysts, and composite catalysts.

1. Metal catalysts: Metal catalysts typically use precious metals such as platinum, palladium, and copper as catalysts, which have high catalytic activity and stability, and are suitable for VOCs oxidation reactions under high temperature conditions.

2. Non metallic catalysts: Non metallic catalysts typically use materials such as oxides and nitrides as catalysts, which have good selectivity and durability and are suitable for VOCs oxidation reactions under low temperature conditions.

3. Composite catalyst: Composite catalyst refers to the combination of two or more catalysts to enhance the catalytic effect. For example, combining platinum with metals such as vanadium and tungsten can improve the stability and selectivity of the catalyst and reduce its cost.

What is the principle of VOCs catalysts?

The working principle of VOCs catalysts is mainly based on their adsorption of reactants and surface chemical reactions. In the oxidation reaction of VOCs, VOCs are adsorbed on the surface of the catalyst and react with oxygen molecules on the surface to form harmless substances such as carbon dioxide and water. In the reduction reaction, the catalyst reacts with a reducing agent to reduce VOCs and convert them into harmless substances.

What are the characteristics of VOCs catalysts?

(1) Improved combustion process, low ignition temperature, fast reaction rate, energy saving and consumption reduction;

(2) Widely applicable, catalytic combustion can handle almost all strange organic waste gases and foul odors.

(3) For low concentration, multi-component, and low recovery value waste gases emitted from industries such as organic chemicals, coatings, and insulation materials, the adsorption catalytic combustion method has better treatment efficiency and economy.

(4) High processing efficiency and no secondary pollution. The purification rate of exhaust gas is above 98%, and the main end products are COz and Hz0.

VOCs catalyst performance parameters

1)   Ignition temperature of catalyst:

2) Recommended working temperature: 250 ° C -350 ° C,

3) Dust concentration requirement:<10mg/m

4) Dust particle size requirement:<70un

5) Requirements for exhaust gas flow rate: It is recommended to be between 1-5m/s,

6) Toxic substances: CI, s, As, etc,

7) Oxygen concentration: ≥ 10-12%;

8) The concentration range of organic waste gas: 100-8000mg/m: (The optimal value is 2000-8000mg/m; below 1000mg/m, it is recommended to first adsorb, concentrate, desorption, and then catalytic combustion, or choose high content precious metal catalysts; above 12000mg/m, it belongs to the dry explosion limit.)

9) Resistance or pressure drop: At a flow rate of 1 meter/s, the pressure drop is between 600 and 700pa;

10) Space speed (refers to the amount of gas processed per unit Unit of time per unit volume of catalyst under specified conditions, in m/m (catalyst · h), which can be simplified as h - ')

VOCs catalyst specifications and dimensions

Professional catalyst design can be carried out based on operating conditions (precious metal catalysts or metal oxide catalysts)

(1) Sulfur resistant catalyst

(2) Anti chlorine poisoning catalyst

(3) Collaborative denitrification and dioxin removal

(4) Collaborative removal of VOCs and dioxins