Advantages and disadvantages of organic waste gas treatment by activated carbon adsorption

In the waste gas treatment, the commonly used technical means are adsorption, absorption, catalysis, condensation and so on. Adsorption refers to the adsorption of harmful substances by the way of physical combination or chemical reaction, so as to achieve the purpose of purification of waste gas.

At present, there are many kinds of adsorbents in the market, such as activated carbon, zeolite and so on. In the adsorption process, adsorbent, equipment, process and regeneration are the key control points.

Requirements for adsorbents such as activated carbon: large specific surface area, good selectivity, strong regeneration, good thermal stability, chemical stability, large adsorption capacity, etc.

In practical application, the advantages of activated carbon are as follows:

The advantages of the activated carbon adsorption process are suitable for the treatment of various low concentration pollutants, low price, low energy consumption, economy, acid and alkali resistance, heat resistance and high chemical stability, and the operation of the activated carbon in the use process is very simple, only need to connect with the air to play a role.

Using adsorption method to purify organic waste gas is more thorough. Without using the means of deep cold and high pressure, the purpose of recycling organic components can be achieved. This method is simple in equipment and operation, with high degree of automation, and will not cause secondary pollution.

Activated carbon adsorption technology also has some shortcomings:

For example, the adsorption capacity is small, and it is easy to saturate in the use process;

The consumption of adsorbents is relatively large, and the adsorption capacity is not strong. After a certain period of use, the adsorption capacity will be reduced, or even lost.

In addition, there is the problem of adsorption specificity in adsorption. For the mixed gas, the adsorption will be weakened, and there is the phenomenon of desorption caused by the mismatch between the molecular diameter of the adsorbed material and the pore diameter of the activated carbon.

In conclusion, when choosing the organic waste gas treatment process, the enterprise should fully consider its own process conditions, waste gas concentration and other factors, and select the most appropriate waste gas treatment process.