Unfortunately, wood pyrolysis is much more complex than your textbook would make it sound. Methanol is also a major pyrolysis product, and there could
be other volatile products too depending on the type of wood being used. Additionally, wood pyrolysis will always produce significant amounts of
various phenols and furans, some of which may be carried over with the more volatile substances.
If you end up doing this, don’t expect to condense anything resembling a pure compound out of the initial pyrolysis. You’ll have to collect a
crude distillate, and then refine it from there. It would be easiest to remove acetic acid and other possible carboxylic acids by simply treating the
distillate with sodium bicarbonate. Then you could try distilling the mixture more gently to separate the most volatile compounds (methanol, acetone)
from the higher boiling crud. Further purification of this would be difficult without a really efficient fractionating column, but at this point you
could dry the distillate and be left with a sort of crude “wood alcohol” that would make a good cleaning solvent if nothing else.
|