Dear Dr. Karve,
I did not see a percent composition in my book. But: Industrial charcoal making FAO FORESTRY PAPER 63 "Thus it is difficult to give exact figures for gas composition and heating value. A typical retort gas could have the following composition by volume:- methane 17%, hydrogen 2%, carbon monoxide 23%, carbon dioxide 38%, oxygen 2% and nitrogen 18%. Offgas from rinsing gas retorts could be diluted more than its own volume with inert rinsing gas. The calorific value varies widely. Undiluted retort gas has a calorific value of about 11 MJ/m³ but would be less than half this when diluted with inert rinsing gas being approximately equal to producer gas. The gas will burn easily but the heat output is limited. For every tonne of charcoal produced about 0.25 tonnes of non-condensable gas is produced having a heat content about 10% of that of the charcoal produced." <http://www.fao.org/docrep/x5555e/x5555e07.htm#TopOfPage> Also: "Approximately from one thousand kilograms of dry wood the following heat quantities are available in megajoules (MJ) in the final products. Charcoal 9500 MJ wood Gas 1500 MJ Condensibles including Tar 8000 MJ" <http://www.fao.org/docrep/X5555E/x5555e04.htm> And of course root: <http://www.fao.org/docrep/X5555E/x5555e00.htm#Contents> Best regards, Jeff On Tue, 2011-01-25 at 08:33 +0800, Anand Karve wrote: > Does your book contain the percentage composition of the fraction that > remains gaseous at room temperature (carbon dioxide, carbon monoxide, > hydrogen, methane and water vapour)? It is the gaseous fraction that > would serve as fuel analogous to biogas. The rest of the chemicals are > most probably components of the tar, which condenses at room > temperature. Yours A.D.Karve -- ________________________________________________ www.puffergas.com Sent from any port in the storm via Acer netbook & Ubuntu Remix. _______________________________________________ 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/
