The effect of the carbonization/activation procedure on the microporous texture of the subsequent chars and active carbons
The effect of the carbonization/activation procedure on the microporous texture of the subsequent chars and active carbons
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DOI：
10.1016/s1387-1811(02)00597-8
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发表时间：
2003-02-04
影响因子：
5.2
通讯作者：
Stoeckli, F
中科院分区：
文献类型：
--
作者：
Cagnon, B;Py, X;Stoeckli, F
通过在400和800 ℃之间的不同中间热处理温度（IHTT）下碳化椰子壳获得的炭在800 ℃下在N-2 + H2O流中活化，遵循两个不同的程序。在第一个程序中，活化直接在碳化之后进行，而在第二个程序中，首先将样品恢复到25 ℃，随后再次加热到800 ℃的活化温度。用浸渍量热法在25 ℃下吸附CO2和在-196 ℃下吸附N-2的数据证实，由在低IHTT下和在两个步骤中获得的半焦衍生的活性炭呈现出烧除的“门效应
Chars obtained by carbonizing coconut shells at different intermediate heat treatment temperatures (IHTT) between 400 and 800 degreesC were activated at 800 degreesC in a stream of N-2 + H2O, following two distinct procedures. In the first procedure, activation follows directly the carbonization, whereas in the second procedure, the sample was first brought back to 25 degreesC and subsequently heated again to the activation temperature of 800 degreesC. The data for CO2 adsorption at 25 degreesC and N-2 at -196 degreesC with immersion calorimetry confirms that the activated carbons derived from chars obtained at low IHTT and in two steps, present a "gate effect" for burn-offs