Joke Collection Website - News headlines - Can wood that is not completely burned be made into activated carbon? If it can't be made of simple materials, how to get rid of the odor in the refrigerator?

Can wood that is not completely burned be made into activated carbon? If it can't be made of simple materials, how to get rid of the odor in the refrigerator?

Activated carbon material is amorphous carbon obtained by processing, which has a large specific surface area and good adsorption capacity for gas, inorganic or organic substances in solution and colloidal particles. Activated carbon materials mainly include activated carbon (activated carbon

Carbon fiber and activated carbon fiber

) and so on. As an excellent adsorbent, activated carbon material is mainly determined by its unique adsorption surface structure and surface chemical properties. Activated carbon material has stable chemical properties, high mechanical strength, acid resistance, alkali resistance and heat resistance, is insoluble in water and organic solvents, and can be recycled. They are widely used in chemical industry, environmental protection, food processing, metallurgy, drug refining, military chemical defense and other fields.

. At present, modified activated carbon materials are widely used in sewage treatment, air pollution prevention and other fields, and show attractive bright prospects in environmental pollution control. [ 1]

More than 80%-90% of activated carbon is composed of carbon, which is why activated carbon is a hydrophobic adsorbent. In addition to carbon, there are two kinds of blends: one is chemically combined elements, mainly oxygen and hydrogen, which remain in carbon due to incomplete carbonization, or foreign non-carbon elements chemically combine with the surface of activated carbon during activation, for example, when activated with steam, the surface of activated carbon is oxidized or oxidized by steam; Another admixture is ash, which is the inorganic part of activated carbon.

The main raw materials of activated carbon can be almost all carbon-rich organic substances, such as coal, wood, fruit shells, coconut shells, walnut shells, apricot shells, jujube shells and so on. These carbonaceous materials are converted into activated carbon by pyrolysis at high temperature and certain pressure in an activation furnace. In this activation process, huge surface area and complex pore structure are gradually formed, and the so-called adsorption process is carried out in these pores and surfaces. The size of pores in activated carbon can selectively adsorb adsorbents, because macromolecules cannot enter the pores of activated carbon which are smaller than other pores. Activated carbon is a hydrophobic adsorbent made of carbonaceous materials through high temperature carbonization and activation. Activated carbon contains a large number of micropores and has a huge surface area, which can effectively remove chromaticity and odor, and can remove most organic pollutants and some inorganic substances, including some toxic heavy metals, from secondary effluent.