Coconut Shell Activated Carbon Formaldehyde Adsorption Effect

Activated carbon is a carbon-based substance (coal, wood, hard shell, etc.), which is converted by pyrolysis under high temperature and high pressure. During the reactivation process, complex pore structures and huge formations are formed. The surface area makes it have good adsorption capacity and chemical stability. In addition to formaldehyde, activated carbon also relies on its own developed pore structure and surface area, which can contact the surrounding air to a large extent and passively adsorb some pollutants into its pores. Therefore, the larger the activated carbon surface, the more developed the pore structure. Stronger.

What is the adsorption capacity of coconut shell activated carbon for formaldehyde?

The pore size of coconut shell activated carbon has a certain relationship with the molecular weight of the material. Theoretical studies have shown that the greater the molecular weight of harmful substances, the easier it is to be adsorbed by activated carbon. For example, the molecular weight of benzene is 78, so industrial activated carbon is better benzene. Sorbent. However, the molecular weight of formaldehyde is 30, and the adsorption capacity is relatively weak. In addition, the adsorption capacity of coconut shell activated carbon is greatly affected by temperature. At 10 ℃, the adsorption capacity of activated carbon is higher, the temperature increases, and the adsorption capacity decreases. After heating in summer, the average summer temperature is higher than 30 ° C or the indoor temperature can be as high as 20 ° C. At this time, the adsorption capacity of activated carbon on formaldehyde is almost lost. Therefore, activated carbon has no significant effect on formaldehyde in indoor air, and other physical adsorption products are also widespread.