Re: GAS-L: NOx and Gasifiers

["Tom Miles" <tmiles@trmiles.com>]

Doug,

One should not conclude that gasifiers do not make NOx. We measured NOx from
the gasification of fuels with different nitrogen contents and found that,
for a given system, NOx generation is proportional to N content.

Comparisons of NOx reduction from gasification with staged combustion and
flue gas recirculation with SNCR (selective non catalytic reduction using
ammonia or urea) are welcome. To my knowledge, except for one large scale
sewage sludge system, efficiencies of staged combustion and FGR techniques
for high nitrogen fuels have not been published.

Regards,

Tom Miles

----- Original Message -----
From: "Graeme Williams" <graeme@powerlink.co.nz>
To: <gasification@crest.org>
Sent: Wednesday, June 26, 2002 1:43 AM
Subject: GAS-L: NOx and Gasifiers


> Dear Colleagues,
>
> During the years that we have been playing with producer gas, both in
> engines for power generation and for process heat in timber kilns, at no
> time has NOx been an emission problem.
>
> Although gasifier temperatures are high, it appears that it just doesn't
> happen in this process although I suppose anything is possible given
certain
> conditions existing.
>
> The adiabatic flame temperature of clean producer gas ie tar free has
never
> exceeded 1100 degrees Celcius, in our experience, and in fact is one of
the
> measures we use to check to see if tar is present in the gas stream.
>
> Hope this helps.
>
> Doug Williams
> FLUIDYNE GASIFICATION
>
>
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http://www.crest.org/articles/static/1/1011975672_7.html Carbon