Reasons for the spontaneous combustion of activated carbon
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This post was last edited by sunjl1981 on 2013-1-6 at 23:55. I would like to ask the experts why the activated carbon collected from the converter heats up and catches fire on its own # ， ， &
This post was last edited by Yinozhang on 2012-3-21 at 10:17. The spontaneous combustion of activated carbon is not due to reaching its auto-ignition temperature, as around 180 degrees is not the auto-ignition point for activated carbon. The reason lies in the fact that activated carbon has the property of absorbing oxygen; it also exerts a certain oxidizing effect on organic substances such as acetylene and vinyl chloride. This absorption process generates chemical heat, and the heat produced by the absorption itself leads to an increase in temperature. Additionally, since oxygen accumulates within the activated carbon, spontaneous combustion occurs quite naturally. Therefore, removing the activated carbon must be done after the temperature has dropped.
This post was last edited by Yinozhang on 2012-3-21 at 10:17. Is there a white residue left after activated carbon catches fire? After disassembling the converter in our factory, there were some white activated carbon particles on the surface of the activated carbon. I’m not sure if this is the situation mentioned on the first floor; if so, then what was mentioned on the second floor finally resolves the doubts in my mind.
The last edit to this post was made by Yino Zhang on 2012-3-21 at 10:17. The spent catalyst extracted from the converter caught fire on its own because a sufficient amount of phosphine had accumulated, allowing it to ignite upon contact with air. If the acetylene delivered remains stable and free of sulfur and phosphorus over time, it will not catch fire on its own. Even if it is not a freshly extracted catalyst, if it contains a high amount of phosphorus, it will catch fire on its own when placed on the ground from the waste bin.
This post was last edited by Yinozhang on 2012-3-21 at 10:16. Activated carbon and the combustible substances it adsorbs begin to burn once the temperature reaches the auto-ignition point; it is essential to pay close attention to temperature control.