Coconut shell activated carbon is the main adsorbent in the field of liquid adsorption due to its strong adsorption capacity and good use effect. The particle size of coconut shell activated carbon used in different environments is also different. What is the effect of the particle size of coconut shell activated carbon on the adsorption effect?
Common particle sizes of coconut shell activated carbon are: 3*6 mesh, 4*8 mesh, 6*12 mesh, 8*16 mesh, 8*30 mesh, 10*20 mesh, 12*30 mesh, 20*50 mesh, 20*80 mesh, 30*100 mesh;
Coconut shell activated carbon can be used for liquid adsorption and gas adsorption. Coconut shell activated carbon with different particle sizes can be selected for applications in different fields.
In the field of water treatment, the requirements for coconut shell activated carbon are: large adsorption capacity, fast adsorption speed, and good mechanical strength. In addition to other external conditions, the adsorption capacity of coconut shell activated carbon is mainly related to the specific surface area of coconut shell activated carbon; the adsorption speed is mainly related to the particle size and the pore distribution of coconut shell activated carbon. Coconut shell activated carbon used for water treatment requires relatively developed transition pores, which is conducive to the diffusion of adsorbents into micropores. The smaller the particle size of coconut shell activated carbon, the faster the adsorption speed, but the loss will increase. Generally, it is more appropriate to be in the range of 8-30 mesh. The mechanical wear resistance of coconut shell activated carbon affects the service life of coconut shell activated carbon.
In the process of gas adsorption, coconut shell activated carbon generally chooses larger particle size 3-6 mesh or 4-8 mesh, which has a fast adsorption speed and can be used for the adsorption of high-concentration harmful gases.
The particle size of coconut shell activated carbon has little effect on the adsorption capacity, but it has an effect on the adsorption rate. The adsorption rate of large particle size is small and the time to reach adsorption equilibrium is long, while the adsorption rate of small particle size is large and the time to reach adsorption equilibrium is short. Usually, in practical applications, granular coconut shell activated carbon is generally used. If the particle size of powdered coconut shell activated carbon is too fine, the filtration speed will be reduced.
