[Stoves] Biomass Reactor Systems Was: Re: Fuel Testing

[Crispin Pemberton-Pigott]

Dear A.D. and Andrew

>...AD Karve has given us an insight that
>char from paper (taken to be nearer to cellulose than wood) yields 30%
>at a temperature where we would expect wood to yield nearer to 45% of
>the dry matter.

It has not been mentioned that during this discussion there are basically
two categories of 'paper': 'mechanical paper' like kraft and cardboard boxes
and newspaper.  That should yield the 45% figure.  It is basically bashed up
wood.

The other category is 'chemical paper' which contains lots of other things
like clay to make printing faster and neater.  This affects its density
(typing paper is really heavy) and char yield (because of the additives).

I would not expect to get any more than the 30% AD reports.  It might appear
to be 'charcoal' but in fact contains quite a bit of 'ash', meaning fired
clay powder.

Regards
Crispin