If Activated carbon is not selected well, its attenuation will be obviously not long. Generally, it needs to be changed every 6 months to 1 year. The adsorption capacity of the special activated carbon can reach more than 100%, and it has good desorption and stability, so the service life is more than 2-3 years, which can save costs. The specific surface area of activated carbon has a great relationship with the pore structure. Different organic solvents use activated carbon with different pore diameters, so as to ensure that the attenuation is not obvious, it has the characteristics of small gas pressure resistance, strong adsorption capacity, and easy desorption, and ensures that the gas has a fast flow rate. To eliminate local temperature rise.
Organic waste gas treatment activated carbon has the advantages of reasonable pore size distribution, high adsorption capacity, fast adsorption speed, large mechanical strength, use in a fixed bed, low gas flow resistance, easy desorption and regeneration, etc., and it can treat most inorganic gases (such as sulfide) in a wide concentration range. Substances, nitrogen oxides, etc.) and most organic vapors and solutes have strong adsorption capacity
The specific indicators are as follows:
Adsorption index: carbon tetrachloride CTC is better than 100%, benzene adsorption: better than 50%, acetone adsorption: more than 50%
Strength: 70-90% or 95% later, depending on the specific application. Not the higher the better, the higher the strength of the adsorption may decrease.
Specific Gravity: The higher the specific gravity, the greater the cost, indicating that the specific surface area is smaller and more solid. Similarly, the larger the proportion of a cube, the heavier it is.
Ash: less than 6%, moisture <5% Impurities can also affect adsorption and cost. Ignition point:> 450 degrees
Material: The main choice is wood or coal. Coconut shell is not suitable because organic solvents require mesoporous activated carbon. If the coal quality achieves the above indicators, the cost is higher than wood. Ordinary coal activated carbon CTC50-70% benzene adsorption: 20-40% wood chemical activated carbon: CTC: 100% -140% benzene adsorption: 45-60% specific gravity is only half of coal quality.
