[Gasification] Design Parameters based on Superficial Velocity

[Kevin Chisholm]

Dear Steve

There are two issues here: 1: Pyrolysis in the presence or absence of air,
and 2: Pyrolysis in a very low pressure retort.

1: Pyrolysis can take place in the absence of air, with the retort at
atmospheric pressure.

2: Pyrolysis can take place in a vacuum.

Pyroligneneous(?) liquors resulting from vacuum pyrolysis are significantly
different from pyroligneneous(?) products resulting from pyrolysis at
atmospheric pressure.

Best wishes,

Kevin

----- Original Message ----- 
From: "Steve Carroll" <luxthreads at yahoo.com>
To: <gasification at listserv.repp.org>
Sent: Tuesday, August 22, 2006 9:58 AM
Subject: Re: [Gasification] Design Parameters based on Superficial Velocity


>
>
> --- 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
>
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