[Stoves] Distillation and oxidation Re: Understanding TLUDs, MPF and more. (was Re: Bangladesh TLUD )

[Paul Anderson]

Stovers,

Distillation:   I refer to a long article that highlights NUMEROUS 
variation of distillation, found at
https://en.wikipedia.org/wiki/Distillation

Crispin has been talking about dry distillation.    In the middle of 
this piece in the "Other types" section:   Quote, with bold-face added:

Dry distillation <https://en.wikipedia.org/wiki/Dry_distillation> or 
destructive distillation 
<https://en.wikipedia.org/wiki/Destructive_distillation>, despite the 
name, *is not truly distillation*, but rather a chemical reaction 
<https://en.wikipedia.org/wiki/Chemical_reaction> known as pyrolysis 
<https://en.wikipedia.org/wiki/Pyrolysis> in which solid substances are 
heated in an inert or reducing <https://en.wikipedia.org/wiki/Redox> 
atmosphere and *any volatile fractions, containing high-boiling liquids 
and products of pyrolysis, are collected*. The destructive distillation 
of wood <https://en.wikipedia.org/wiki/Wood> to give methanol 
<https://en.wikipedia.org/wiki/Methanol> is the root of its common name 
– /wood alcohol/.

*********************************
Oxidation during pyrolysis:

Not a reference, but a statement and question:   When a carbohydrate 
molecule (containing O and H and C) is broken apart by heat (which is 
the process of pyrolysis), what happens inside the molecule is not 
totally understood.  Is it not possible that a carbon atom that is 
linked to an oxygen atom (and to many other atoms) could not be shedding 
the other atoms and the C + O are never separated?   That would result 
in a molecule of CO that is NOT from the combination of C with O, and 
therefore the C was not oxidized.   The C was already with the O.

The "atomic scientists" can discuss that possibility.   I leave it as CO 
being present as a result of pyrolysis, and not necessarily because some 
"free standing" "liberated" atom of O was then joined with an atom of C.

  Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:psanders at ilstu.edu <mailto:psanders at ilstu.edu>
Skype:   paultlud    Phone: +1-309-452-7072
Website:www.drtlud.com <http://www.drtlud.com/>


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