[Gasification] Design Parameters based on Superficial Velocity

[Thomas Reed]

Dear Steve:

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.
>
> Steve
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
>
> _______________________________________________
> Gasification mailing list
> Gasification at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/gasification_listserv.repp.org
> http://www.repp.org/discussiongroups/resources/gasification
>
>
>