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Jiangsu activated carbon manufacturers share activated carbon activation mechanism

Author: ComeFrom: Date:2021/6/25 9:44:08 Hits:1283

       When talking about activated carbon, everyone must think of black particles or columns. In fact, the two most important processes in the production of activated carbon are carbonization and activation, carbonization is the smouldering of carbon-containing materials at low temperature and lack of oxygen. Activation is carried out at high temperature by introducing an activator (usually water vapor) . The process of activation is more complicated, the following by Jiangsu activated carbon activation plant-shangding environmental science and technology to introduce the activated carbon activation mechanism, the specific content is as follows:


      1、Swelling effect
      At temperatures below 200 ° C, the ionization of phosphoric acid can make biopolymers in lignocellulosic materials swell, gelatinize and dissolve, dissolved cellulose forms pores, which are accompanied by hydrolysis and oxidation reactions that gradually depolymerize the macromolecule to form a homogeneous plastic material consisting of a partial polymer and phosphoric acid.

      2、Accelerate carbon activation process
      Carbon activation needs to be carried out at a certain temperature, and phosphoric acid radically changed the pyrolysis process of wood, significantly reducing the activation temperature, and because of the swelling effect of phosphoric acid on biopolymers, it can penetrate into the inside of the raw material particles and make the raw material heat evenly. Therefore, the material impregnated with SSP can be heated quickly and evenly without local overheating, and the activation time of general phosphoric acid activation method is 0.5 ~ 1.5 H.
      3、It has catalytic dehydration at high temperature
      When the lignocellulosic material is carbonized, a large amount of tar is produced and the yield of carbon is reduced, before the decomposition of Chinese fir sawdust at high temperature, the hydrogen and oxygen in the sawdust dehydrate first, and are removed as water, so that more carbon can be retained and the yield of activated carbon is higher. At the same time, phosphoric acid can inhibit the production of tar, and lead to a high degree of residual carbon aromatization.
      4、Oxidation
      Phosphoric acid has oxidation properties that zinc chloride does not have. It can further oxidize the formed carbon, which can corrode the carbon and form microcrystalline structure.

      5、Aromatic condensation
      Cellulose is one of the main components of wood, which is depolymerized by protons, dehydration of lignocellulose, formation of aromatic ring structure and removal of phosphate groups. When the temperature rises (100 ~ 200 ° C) , the mechanism of dehydration of ethanol catalyzed by acid is the same as that of dehydration of ethanol catalyzed by phosphoric acid and hydroxyl elimination of organic compounds, a large number of activated carbon with network structure, well-developed micropores and high specific surface area were obtained.

      6、Act as a skeleton during carbonization
      Phosphoric acid acts as a skeleton during carbonization and provides a skeleton for the carbon to be deposited on the skeleton when the raw material is carbonized, it binds carbon to inorganic phosphorus.
      Shangding environmental science and technology has long been committed to food refining/environmental engineering full range of technical services, engineering achievements throughout Asia. Our process areas: activated carbon manufacturing/regeneration technology and plant systems; food sugar adsorption and decolorization technology and plant systems; wastewater advanced treatment technology and plant systems; Technology and equipment system of adsorption/pyrolysis treatment of three industrial wastes (solid-liquid gas) . Looking forward to working with you!

Next:Jiangsu activated carbon activation factory on the impact of activated carbon activation process what factors?

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