Before asking about the relationship between the ability of shell carbon to absorb gas and temperature, Fruit shell activated carbon manufacturer In order to better understand the relationship between carbon adsorption capacity and temperature, it is necessary to clarify the principle of carbon adsorption of gas.

1、 Principle of carbon adsorption of gas:

The adsorption phenomenon occurs at two different phase interfaces. The adsorption process is a diffusion process at the interface, and it is an adsorption on the solid surface, which is caused by the residual attraction on the solid surface. Adsorption can be divided into physical adsorption and chemical adsorption.

Physical adsorption: physical adsorption is caused by the electrostatic force or van der Waals gravity between the adsorbent and the adsorbate molecule. When the molecular gravity between the solid and the gas is greater than that between the gas molecules, even if the pressure of the gas is lower than the operating temperature and the saturated vapor pressure, the gas molecules will condense on the solid surface.

Chemisorption: also called adsorption, refers to chemical adsorption caused by the chemical reaction force between the adsorbent surface and the adsorbate molecule, which involves the destruction and recombination of chemical bonds in the molecule. In the process of adsorption, there is no strict boundary between physical adsorption and chemical adsorption, and the same substance is often chemically adsorbed at a lower temperature.

Carbon adsorption gas is mainly physical adsorption, but due to the presence of surfactant, there is also some chemical adsorption.

2、 The relationship between carbon adsorption capacity and temperature:

1. The higher the temperature is, the faster the relative movement of molecules is, the less easily they are bound and the less easily they are adsorbed.

2. The lower the temperature, the stronger the adsorption capacity, the slower the adsorption speed and the longer the adsorption time.

3. The adsorption capacity is almost zero after 500 ° C when the temperature is between - 30 ° C and 400 ° C.

Therefore, the ability of carbon to adsorb gas weakens with the increase of temperature.

3、 Selection of carbon adsorption gas:

With the increase of temperature, the ability of shell carbon to absorb gas becomes weaker Activated carbon manufacturer Generally, customers have technical choices on adsorption time and adsorption capacity caused by adsorption temperature. If you can't make a good choice, you can contact our carbon manufacturer and we will provide you with solutions.