Spontaneous combustion in the pentane removal column of pyrolysis gasoline
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When opening the manhole in the pentane removal column for pyrolyzed gasoline, water should be poured in from the top to prevent spontaneous combustion of the materials inside the column. What exactly causes spontaneous combustion, and what harmful gases are produced as a result?
I think peroxides are the main cause of spontaneous combustion. The gases mainly include nitrogen oxides, CO, etc. .
It is mainly the diolefin polymers in C5 that undergo spontaneous combustion; it also contains some iron oxide. There is a pungent smell of burning plastic or rubber – it’s toxic! ! ! :)
One can look it up using the property table for substances inside the tower; they are generally low-flash-point, reactive, unsaturated hydrocarbons. Incomplete combustion produces toxic substances such as oxynitrides and carbon monoxide.