1. Look at the density

The more pores the activated carbon has, the higher the adsorption performance will be, the looser the activated carbon will be, the lower the relative density will be, and the lighter the hand will be. Packaging with equal weight In this case, the volume will be larger. It is recommended to purchase activated carbon products with low density, light feel and large volume of equal weight.

2. Look at the size

The smaller the activated carbon particles, the larger the contact area with air, the larger the specific surface area, and the better the adsorption performance. However, the smaller the particles, the greater the crushing and production process. The greater the medium loss, the more dust, and the higher the cost. Therefore, in order to reduce costs, many manufacturers use large particle activated carbon. The performance is of course not good. Generally, activated carbon with a particle size of about 0.5 mm achieves the best performance. Also make sure it is not powder and has no contamination. It is recommended to choose activated carbon products with particle diameters between 0.42-0.85 mm.

3. Look at the components

Activated carbon absorbs harmful gases based on pore size. Different harmful gases have different molecular weights and different particle sizes. The gaps of activated carbon should be between 0.45-2 nanometers. to absorb toxic gases such as formaldehyde. Internationally, coconut shell charcoal is the preferred activated carbon for absorbing odors, stupidity and other pollution. Gas phase spherical microporous activated carbon is the most ideal formaldehyde adsorbing carbon. It is recommended to purchase a comprehensive adsorption product mixed with coconut shell activated carbon and gas phase spherical microporous activated carbon. Coconut shell is not necessarily the best, it must match the pore size of harmful gas molecules.

4. Look at the dust

In the process of producing activated carbon, the crushed raw materials must be processed to remove dust. Otherwise, there will be too much dust and poor cleanliness, which will cause harm to the human body and items. Pollution. In order to reduce costs, low-quality activated carbon on the market does not undergo post-processing. The dust is very large. Dark packaging bags are often used. Small carbon bags are dirty to the touch. When used, they will stain items and cause secondary pollution. It is recommended to choose a small charcoal bag, which is a white breathable non-woven bag that does not feel dusty or dirty.