ACTIVATED CARBON » Discussions


"Regeneration" of activated carbon

  • Carrie Ge
    Host
    November 17, 2020
    When the activated carbon reaches saturation, it does not mean that the activated carbon has no use price. After proper desorption and regeneration, the molecules of the adsorbent in the activated carbon will be separated out, so that the adsorbent can be used again.



    Temperature rise desorption is a commonly used desorption method. The adsorption capacity of activated carbon will decrease with the increase of temperature. activated carbon powder If the temperature is increased to a certain extent, the adsorbent will rely on the adsorbed materials, which is our common temperature rise desorption.



    Washing and desorption is to remove the non adsorbed gas and liquid from the surface of activated carbon. Although the effect of this method is obvious, it has great limitations.



    The adsorption capacity of vacuum desorption activated carbon will increase with the increase of pressure. Reducing the pressure makes it close to vacuum, which can regenerate the adsorbent of activated carbon, which is also one of the common methods of gas desorption.



    Displacement desorption is the use of adsorbents with stronger adsorption capacity than the adsorption of impurities, and then use other methods for separation. This method is mainly used for some difficult adsorbed impurities.



    Magnetization desorption mainly desorbs the adsorbate in the solution, mainly adsorbs the acute groups in water or solution with acute groups, so as to achieve the desorption process. The adsorption capacity of activated carbon after magnetization desorption will decrease.



    Ultrasonic desorption is the use of ultrasound to break the adsorption equilibrium relationship, the use of ultrasound to compress the micro particles, reduce the adsorption stability of activated carbon, so that the adsorbed material can be separated to achieve the purpose of desorption.



    The application of activated carbon in China is relatively late, and the regeneration process is relatively limited, which greatly limits the use of chengde wanyang activated carbon. I believe that with more in-depth understanding, the regeneration process of activated carbon is further improved and expanded, and the activated carbon can be more fully and effectively utilized.