This should be of interest to biochar and gasification enthusiasts. Thanks Tom Reed.
Tom Miles -----Original Message----- From: Stoves [mailto:[email protected]] On Behalf Of Thomas Reed Sent: Tuesday, May 14, 2013 8:55 PM To: [email protected] Dear Gasologist We should all distinguish clearly when discussing gasification between O Total gasification (eg an Imbert gasifier) that converts typically 98% ot the wood to WoodGas O Pyrolytic Gasification (TLUD and larger) which primarily gasifies the cellulose and pyrolyses the lignin to ~20% charcoal <><><> The smoke from a TLUD stove will leave a deposit on a cold steel plate. I was interested in finding out how much "tar" was in the TLUD combustible gas before it is burned. I measured the "tar" production from a TLUD stove by putting a 4" galvanized elbow (wrapped in wetted towels) in the stove, and a 4 ft length of galvanized pipe followed by another elbow and chimney. Instead of the tarry deposit I expected, I obtained about 1% of a brown powdery deposit that was quite dry to the touch. I now wish I had saved it and analyzed it further. But I suspect a similar experiment on the Imbert gas would give a much higher "Tar" content, originating mostly from the lignin. <><><> The charcoal resulting from the TLUD is generally a bonus, depending whether you have a use for it. The temperature of the flaming pyrolysis below the surface of the TLUD stove is between 500 and 700 C (measured with a Cr-Al thermocouple). For this reason, the charcoal produced is much more absorptive than commercial (<450 C) charcoal. This spring I am doing some planting tests on TLUD charcoal vs commercial charcoal. I'll report results. Onward to the future of charcoal... Tom Reed Dr. Thomas B Reed [email protected] 508-353-7841 _______________________________________________ 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/
