[Gasification] Design Parameters based on Superficial Velocity
tombreed at comcast.net
Tue Aug 22 08:40:44 CDT 2006
There are indications that once started, pyrolysis is autothermic for
*bone dry wood*. I have set up very well insulated systems to test
this, but haven't accomplished it yet. However, the energy required for
pyrolytic gasification of Denver dry (8% moisture) wood is probably < 5%
of the heat of combustion (21 MJ/kg; 8500 Btu/lb).
But of course BDW doesn't occur in nature. We are planning to measure
the minimum air required for flaming pyrolysis as a function of moisture
content, but don't hole your breath....
TOM REED BEF
Steve Carroll wrote:
> --- Jeff Davis <jeff0124 at velocity.net> wrote:
>>> can pyrolysis take place
>>> in a complete vacuum?
>> If by vacuum you mean not air blown, you can make
>> gas in a retort.
> No, I mean can pyrolysis take place in the total
> absence of air. I think the answer is yes but I think
> I remember reading something that said that the rate
> of pyrolysis could be controlled by airflow. I
> probably misread that though. Also, I regretfully
> never paid enough attention in Chemistry class; it's
> probably one of my weakest areas of knowledge.
> BTW list, sorry that my line breaks aren't showing up
> in the archived list server. I'm not sure of how to
> fix it.
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