[Gasification] Tar on inlet valves

[Oscar Jimenez]

Dear Leland.
 
Thank you very much for the message. 
....Yes, you are right, and I understand your point, but.....however the
main idea written in my message was to stress the fact that the best way
for avoiding or eliminating (not to 100%, maybe) unwanted matters or
effluents is to attack them on the site where it is forming or
developing. Of course 100% efficiency on this process usually is not
possible but at least it can effectively help in getting a better
quality of producer gas. The problem, to my modest knowledge, is that a
rather poor control, so far, on gasification mechanisms does not help in
diminshing (to minimum extent possible) tar content on gas output from
the gasifier. Why should we be waiting for tar forming or developing in
the reactor itself and then afterward start running to chase it for
avoiding it getting to the engine or some other relevant places we do
not want it to....?????? 
 
Kindest regards.
 
Oscar.
 
 
 
-----Mensaje original-----
De: LINVENT at aol.com [mailto:LINVENT at aol.com] 
Enviado el: Martes, 24 de Octubre de 2006 11:45 a.m.
Para: oscar at geprop.cu; vincent at igrin.co.nz;
gasification at listserv.repp.org
Asunto: Re: [Gasification] Tar on inlet valves
 

In a message dated 10/24/06 6:32:12 AM, oscar at geprop.cu writes:




Hi...!!!

..my modest knowledge on gasification has told me that the fight in
getting tar free producer gas is gained in the gasifier itself.
Correctly understanding the mechanism happening inside the gasifier and
controlling accordingly main parameters, can ensure the best gas quality
in reactor output.

Kindest regards.

Oscar.
Dear Oscar,

Cool, how do you do that? It is certainly easier to do in an armchair.
What about the residual tar content with even the best gasifiers? Then
there is the water and dissolved organics which will acidify the engine
oil and eat up the bearings? 
An interesting thought is that the tar content of the gas is somewhat
dependent upon the efficiency of the combustion process within the
gasifier. Complete combustion of the solid fuel results in zero
tars-right? However, this is not gasification, but combustion.
Gasification is a step toward combustion, being  between complete
combustion and mere whatever else say pyrolysis.




Sincerely,
Leland T. Taylor
Leland T."Tom" Taylor
President
Thermogenics Inc.
7100-F 2nd St. NW Albuquerque, NM 87107
Phone:505-463-8422 Fax:505-268-9206 (call first)
Web:thermogenics.com