Tom, Sridhar,
Is part of the solution to make producer gas with more hydrogen in it? Tom From: [email protected] [mailto:[email protected]] On Behalf Of Thomas Reed Sent: Tuesday, June 28, 2011 6:26 PM To: Discussion of biomass pyrolysis and gasification Cc: Sridhar Gururaja Rao; <[email protected]> Subject: Re: [Gasification] Producer Gas Engine Paper Dear Eric and all You commented on the lack of knock in engines running on producer gas. The Octane of a fuel turns out to be 10x the compression ratio at which the engine will knock on a fuel in that engine. Typical gasoline engines today have a CR of 8.5 and won't knock on 85 octane gasoline, but will knock on 80 octane gasoline. Small planes typically demand high test gasoline 100 octane and have a CR of 10:1. It is important to use the highest CR that a fuel will support. Both power AND efficiency increase linearly with CR. I believe the octane of producer gas is over 150, and I have been urging all to raise the CR of engines running PG. My company, CPC, ran PG in an engine with CR 15 and got no knock and spectacular power and efficiency. It took five years to get them to do it. Tom Reed Dr Thomas B Reed President, The Biomass Energy Foundation www.Woodgas.com On Jun 28, 2011, at 2:11 PM, "Erin Rasmussen" <[email protected]> wrote: Sridhar recently forwarded us information about his paper about Producer Gas Engines. It is an interesting paper, and we've posted a link to it from the gasification web site, but you can also get it directly from the publisher with this link. G. Sridhar and Ravindra Babu Yarasu (2010). Facts about Producer Gas Engine , Paths to Sustainable Energy, Jatin Nathwani and Artie Ng (Ed.), ISBN: 978-953-307-401-6, InTech, Available from: http://www.intechopen.com/articles/show/title/facts-about-producer-gas-engine To sum up, they connected an engine that has been designed to run on producer gas, to a downdraft gasifier, and recording and analyzing the results. There may be some surprises here, like the lack of knock at higher compression ratios, and the information gathering is both sound, and beautifully presented. Cheers, Erin Rasmussen TR Miles Techical Consultants Inc. and BioEnergy Discussion Lists [email protected] _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
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