RE: GAS-L: Self Ignition Temperature of Producer Gas

["Schmidt, Darren" <dschmidt@undeerc.org>]

Good question.  Work we have done in this area is confidential.  However
what I can tell you is that your conditions are close to the borderline of
ignition vs no ignition.  I do not know if there is any public data
available to help you.  You may need to do some experiments to prove it to
yourself.  I can assure you that when hydrogen is mixed with other gasses
the potential for auto ignition changes, and your statement about avoiding
autoignition is likely correct.  However your concentrations of hydrogen are
higher than the concentrations I am familiar with.  I cannot say for sure
whether you are at the autoignition temperature or not.

-----Original Message-----
From: N.Selvakumar (PE/PPP) [mailto:selva@me.iitb.ac.in]
Sent: Monday, September 09, 2002 6:56 AM
To: gasification@crest.org
Subject: GAS-L: Self Ignition Teperature of Producer Gas



Dear All,
        What will happen if I mix hot Producer Gas (Temperature of gas
around 400-450C) with air (room temperature).
1. Presence of H2 specie in producer gas will self ignite the gas at what
   temperature.
2. The dilution ratio of gas to air 3 to 5 (by volume), will this
   dilution ratio avoid self ignition (Since stochiometric A/F ratio for
   Producer gas is 0.98 by volume). Mixing of air to hot producer gas in
   this range of dilution ratio will avoid danger of explosion, Am I
   correct?..

What I have doubt is
Fundamentals of premixing of high temperature producer gas with room  
Temperature of  air.

I welcome all healthy discussion.


With Regards,
Selvakumar     




With Regards,
Selvakumar

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