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    Home > Chemicals Industry > Chemical Technology > Preparation of activated carbon with wood as raw material

    Preparation of activated carbon with wood as raw material

    • Last Update: 2021-11-15
    • Source: Internet
    • Author: User
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    (5) Preparation example

    ①Preparation of activated carbon with wood as raw material Two kinds of coniferous fir and masson pine in southern China and two broad-leaved paulownia and poplar in the north as raw materials, using zinc chloride as activator, and using different processes to prepare activated carbon
    .
    The process of preparing activated carbon is as follows:

    Raw material → sieving → zinc chloride impregnation → carbon activation → zinc chloride recovery → pickling → rinsing → drying → crushing
    .

    Main process parameters: sawdust drying air temperature is 280℃, after drying sawdust moisture 28%-30%; zinc chloride concentration (in °Be) is 45 (pH1), 48 (pH2) and 53 (pH2.
    5) ° Be; zinc chloride dipping sawdust time 8h, temperature 28-30℃; carbon activation time 2h, carbon activation end temperature 650℃; pickling vapor pressure 0.
    2MPa, pickling time 1h; activated carbon crushing fineness 0.
    08mm sieve passed 80%

    .

    The ratio of zinc chips after mixing sawdust and zinc chloride at 45°Be is 1.
    5:1; the ratio of zinc chips after mixing sawdust and zinc chloride at 48°Be is 1.
    8:1; and at 53°Be the zinc chip ratio is mixed with zinc chloride.
    The chip ratio is 2.
    4:1

    .

    The main performance test results of activated carbon prepared under different process conditions are shown in Table 4-31
    .

    Table 4-31 The main performance test results of activated carbon prepared under different process conditions

     

     

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