Activated carbon for gas phase adsorption

The preparation methods of columnar activated carbon mainly include physical adsorption method, chemical adsorption method, physical chemical method, etc.

 

Pellet activated carbon is a very important environmentally friendly material. It has the advantages of high specific surface area, porosity, adsorption performance and chemical stability, and is widely used in various fields.

Preparation of columnar activated carbon

The preparation methods of columnar activated carbon mainly include physical adsorption method, chemical adsorption method, physical chemical method, etc.  

Among them, physical adsorption method is one of the commonly used methods. It uses the pore structure and surface chemical properties of activated carbon and uses gas phase adsorption as the main means to adsorb target substances on the surface of activated carbon, thereby purifying air and water.  

The preparation steps of physical adsorption method usually include raw material selection, material grinding, impregnation, drying, carbonization, activation, etc.  

Among them, the selection and grinding of raw materials are key steps. Generally, materials with higher carbon content, low ash content and moderate hardness need to be selected as raw materials, and then the raw materials are ground and screened to obtain particles with uniform particle size.  

Impregnation is one of the important steps in preparing columnar activated carbon. It can form a uniform layer of adsorbent on the surface of activated carbon, thereby improving the adsorption performance of activated carbon.  

During the impregnation process, one or more active substances are generally selected as the adsorbent, dissolved in a solvent, and then the activated carbon particles are soaked in the solution to fully adsorb the adsorbent.  

The purpose of drying and carbonization is to remove solvents and organic substances in the impregnation solution, reduce the ash content of activated carbon and increase its carbon content.  

During the drying and carbonization process, high-temperature heat treatment is generally used to obtain high-quality columnar activated carbon.  

Performance of columnar activated carbon  

Pillar activated carbon has many excellent properties, including high specific surface area, porosity, adsorption performance and chemical stability.  

First, columnar activated carbon has high specific surface area and porosity, which are key factors in its adsorption performance.   Since activated carbon has rich pore structure and surface chemical properties, its surface area and porosity can be fully utilized to adsorb and separate target substances, thereby purifying air and water.  

Secondly, columnar activated carbon has excellent adsorption performance, strong adsorption capacity and selectivity, and can adsorb a variety of organic substances, gases, heavy metal ions and other substances. Its adsorption speed and adsorption capacity are much higher than traditional adsorbents.

In terms of gas phase adsorption, activated carbon is mainly used in fields such as air purification, gas separation and storage. First of all, activated carbon is the most widely used in the field of air purification. With the rapid development of industrialization and urbanization, air pollution problems are becoming increasingly serious. As an efficient adsorbent, activated carbon is widely used in air purifiers in homes, offices, hospitals and other places. Activated carbon can effectively absorb particulate matter, harmful gases and odors in the air, thereby improving indoor air quality and protecting people's health.  

In addition, columnar activated carbon also has good chemical stability and mechanical strength, can operate stably in various harsh environments, and has a long service life. Its use is of great benefit to the environment, thanks to its balanced formulation with local raw materials and its manufacture with low energy and water consumption processes, which considerably reduces its carbon footprint.

The potassium hydroxide (KOH) impregnation makes it particularly suitable for the removal of hydrogen sulphide (H2S) and acid gases in general, making it very suitable for deodorisation in wastewater treatment and pumping stations.