Methods of manufacturing activated carbon and its application in the field of raw materials for chemicals production
Abstract
Activated carbon is an important adsorbent widely used in the field of raw materials for chemicals production, which has the advantages of high specific surface area, high porosity, and good adsorption performance. This paper describes the manufacturing methods of activated carbon and its application in the field of raw materials for chemicals production, including various preparation methods such as physical, chemical and physicochemical methods, and the application of activated carbon in gas adsorption, liquid adsorption, catalyst carrier and so on.
Keywords: activated carbon, manufacturing method, raw materials for chemical production, adsorbent
I. Introduction
Activated carbon is a material with excellent adsorption properties, which is widely used in the field of raw materials for chemical production. Due to its unique physical and chemical properties, activated carbon plays an important role in gas adsorption, liquid adsorption, catalyst carrier and so on. In this paper, the manufacturing method of activated carbon and its application in the field of raw materials for chemical production will be introduced in detail.
II. Manufacturing methods of activated carbon
1. Physical method
The physical method mainly includes carbonization and activation methods. Carbonization method involves pyrolysis of raw materials at high temperature to convert them into carbon structure. The activation method is to activate the charcoal by physical methods (e.g. water vapor, carbon dioxide, etc.) on the basis of carbonization to increase its specific surface area and porosity.
2. Chemical method
The chemical method mainly involves the chemical treatment of raw materials by chemical reagents to convert them into activated carbon. Commonly used chemical reagents are phosphoric acid, potassium hydroxide and so on.
3. Physicochemical method
Physicochemical method is a combination of physical and chemical methods, including chemical activation method and physical-chemical activation method. Chemical activation method is to introduce chemical reagents in the process of carbonization, so that the carbonization process and the activation process are carried out at the same time. Physical-chemical activation method is to carry out physical activation and then chemical activation after carbonization.
Third, the application of activated carbon in the field of raw materials for chemical production
1. Gas adsorption
Activated carbon is widely used for gas adsorption because of its excellent adsorption performance, such as adsorption of formaldehyde, benzene and other harmful gases in the air, as well as sulfur dioxide, nitrogen oxides, and other pollutants in the industrial waste gas.
2. Liquid adsorption
Activated carbon can also be used for liquid adsorption, such as decolorization, deodorization, and removal of organic matter in water treatment, as well as decolorization and desulfurization of oil products.
3. Catalyst carrier
Activated carbon as a catalyst carrier can improve the dispersion and stability of the catalyst and increase the catalytic efficiency. For example, in oil processing, activated carbon can be used as catalyst carrier for catalytic cracking, hydrogenation and other processes.
IV.CONCLUSION
Activated carbon, as an important adsorbent, plays an important role in the field of raw materials for the production of chemicals. Its manufacturing methods include a variety of methods such as physical, chemical and physicochemical methods, and suitable manufacturing methods can be selected according to the raw materials and product requirements. The application of activated carbon in gas adsorption, liquid adsorption and catalyst carrier provides important support and guarantee for chemical production.
