Dear Jeff, thanks for the information. I am still not happy with the 18% nitrogen. Where does it come from? A.D.Karve
On Sat, Jan 29, 2011 at 10:10 AM, Jeff Davis <[email protected]> wrote: > 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/ > -- *** Dr. A.D. Karve President, Appropriate Rural Technology Institute (ARTI) *Please change my email address in your records to: [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/
