The physical activation method usua

The physical activation method usually performs high temperature activation of 800°C after low-temperature carbonization (600°). During the process, steam, CO2, and other gases are introduced to protect the system. High-temperature gas reacts with the material to form a pore structure on the surface of the material. The process flow is shown in the figure. Two shows. The process of carbon-based activation by gas as a physically active agent can be divided into five steps: the first step, the gas phase active agent molecule slikely diffuses to the surface of the carbonized material; In the second step, the active agent moves from the particle surface to the pores to carbon, the active agent molecule reacts with carbon to produce gas. In the fourth step, the gas generated by the reaction diffuses from the inside of the substrate to the surface of the particle. The manufacturing process for producing activated carbon through physical activation is simple and clean, with out of corrosion and environmental pollution. Activated carbon products do not need to be cleaned and can be used directly. Therefore, this type of activation is usually used in the industry in the manufacture of activated carbon. However, the gas active agent selected for physical activation is relatively reactive and it is difficult to form a well-developed pore structure inside the carbonaceous precursor. Within 1.0cm³/g.