Activated carbon is a black powder, granular or pellet amorphous with porous carbon, the main component of carbon, but also contains a small amount of oxygen, hydrogen, sulfur, nitrogen, chlorine. Has a large surface product (500 1000 m 2/ g) has a strong adsorption performance, can absorb gas, liquid or colloidal solid on the surface; For gas, liquid, adsorbed material quality can be close to the quality of activated carbon itself. The adsorption of non-polar substances is more selective than that of polar substances. In the same series of substances, the higher the boiling point of the substance is more likely to be adsorbed, the higher the pressure, the lower the temperature, the higher the concentration, the greater the adsorption capacity. On the contrary, decompression and temperature rise are favorable for gas desorption. Often used for gas adsorption,Separation and purification, solvent recovery, sugar liquid, oil, glycerin, drug decolorizer, drinking water and refrigerator deodorant, the filter agent in gas mask, can also be used as a catalyst or metal salt catalyst carrier. In the early stage, the raw materials for activated carbon production were wood, hard nut shell or animal bone. Later, coal was mainly used. Activated carbon production methods were as follows:

(1) Steam, gas activation method: the use of water vapor or carbon dioxide at 850 900 ℃ will be activated carbon.

(2) chemical activation method: the use of activator released gas, or activator impregnation of raw materials, high temperature treatment can be activated carbon.

This determines that activated carbon has good adsorption, can adsorb waste water and waste gas metal ions, harmful gases, organic pollutants, pigments, etc. The industrial application of activated carbon also requires large mechanical strength, good wear resistance, structure to be stable, adsorption required energy is small, in order to facilitate regeneration. Activated carbon is used for decolorizing and deodorizing oil, beverage, food and drinking water, gas separation, solvent recovery and air regulation, as catalyst carrier and adsorbent for gas mask. You need an activated charcoal mask to keep your airway clear

1. The newly decorated room is full of toxic gases such as formaldehyde and benzene. You need an activated carbon respirator for protection.

On a crowded bus, breathing germy air, you need an activated charcoal mask.

3. You’ll need an activated charcoal mask if you’re stuck on a congested street and car exhaust makes you want to put your hands over your mouth.

4. Patients with respiratory diseases are doubly sensitive to air pollution. Activated carbon masks can improve their protective ability and help them recover from the disease.