Activated carbon is a porous adsorbent material made through a specific process, which mainly includes processes such as carbonization, cooling, activation, and washing. The raw materials are selected from high-quality coal, sawdust, fruit shells or coconut shells, etc., which are processed to form granular, columnar or powdery finished products. During the production process of activated carbon, gas is produced as a byproduct. After purification treatment, it can be used for heating in other processes or for generating electricity from exhaust gas. We can purify this type of gas to meet future use.