| After the toxic gas is filtered by coconut shell activated carbon, the strong specific surface area of the coconut shell activated carbon can absorb the toxic vapor in the micropores, thereby filtering out the toxic gas. The types of coconut shell activated carbon gas masks on the market are also relatively different. activated carbon suppliers south africa Many, the activated carbon in a good chemical filter box should be densely packed, with a small particle size and a large specific surface area, so that the anti-virus time will be long, and at the same time, it should be considered that the breathing resistance is small and it is comfortable to wear.
Generally speaking, different types of chemical filter cartridges can prevent different types of chemical substances, such as organic, acid, comprehensive anti-virus, ammonia, etc.
①The pore volume of the macropores of coconut shell activated carbon is generally about 0.2-0.5 mL/g, and the surface area is only about 0.5-2 m2/g. One of its functions is to make the adsorbate molecules quickly penetrate into the smaller pores inside the activated carbon;
③When used as a catalytic carrier, the catalyst is often deposited in a small amount in the micropores, mostly in the macropores and mesopores. The surface area of the activated carbon mentioned should include the internal surface area and the external surface area. activated carbon powder price In fact, the adsorption properties mainly come from the huge internal surface area. Therefore, it should not be mistaken that: grinding the activated carbon into fine grinding will significantly increase the surface area and thus increase the adsorption capacity.
Many adsorptions are reversible physical adsorption, that is, the adsorbed substance is a fluid, which is adsorbed by activated carbon at a certain temperature and pressure, and the adsorbed substance is desorbed at high temperature and low pressure, and the inner surface of the activated carbon returns to its original state. This is a widely used physical adsorption. |
