Preparation method of pressed active carbon for pressure swing adsorption/separation of methane/nitrogen

Preparation method of pressed active carbon for pressure swing adsorption/separation of methane/nitrogen

  • CN 101,531,365 B
  • Filed: 03/18/2009
  • Issued: 06/19/2013
  • Est. Priority Date: 03/18/2009
  • Status: Active Grant
First Claim
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1. the preparation method of a pressed active carbon for pressure swing adsorption/separation of methane/nitrogen, is characterized in that comprising the steps:

  • (a) pulverize, take coal as raw material, it is crushed to 160~

    200 orders;

    (b) air pre-oxidation is put into coal dust heating furnace and is placed in air, is heated to 300~

    450 ℃

    , constant temperature 0.5~

    2.5h at this temperature with the programming rate of 5 ℃



    15/min;

    (c) kneading adds coal tar binding agent and water evenly to mix in coal dust, and the weight of coal tar is 20~

    40% of coal dust weight, and the weight of water is 5~

    20% of coal dust weight;

    (d) moulding is shaped to the cylinder particle of bottom surface diameter 3~

    4mm, high 5~

    7mm on forming machine, then at 80~

    90 ℃

    of temperature dry 3~

    8h;

    (e) carbonization is put into heating furnace with the coal after moulding, is under the nitrogen protection of 100-400 ml/min at flow, is heated to 600~

    1000 ℃

    , constant temperature 0.5~

    4h at this temperature with the programming rate of 5 ℃



    15/min;

    (f) after carbonization is completed, be cooled to the room temperature discharging, more namely obtain the granular active carbon adsorbent after washing, drying.2. the preparation method of pressed active carbon for pressure swing adsorption/separation of methane/nitrogen according to claim 1, it is characterized in that;

    after the step (e) and step (f) also be provided with before activation step, after carbonization is completed, pass into steam and nitrogen in heating furnace, be to activate 0.5~

    4h under the condition of 750~

    950 ℃

    in temperature, the flow of steam is 2~

    6ml/min, and the flow of nitrogen is 100~

    400ml/min.

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