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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>A cyclone sawdust gasifier was developed and tested by Jim (JW) cousins in New Zealand in the early 1980s. Google “cyclone gasifier”</span> <span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>http://pubs.acs.org/doi/abs/10.1021/i200031a063<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>There have been various research versions since but nothing commercial. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Jaques Lede worked on a fast pyrolysis cyclone reactor. I suspect that the char yields were pretty low. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><a href="https://www.researchgate.net/publication/231393861_The_Cyclone_A_Multifunctional_Reactor_for_the_Fast_Pyrolysis_of_Biomass">https://www.researchgate.net/publication/231393861_The_Cyclone_A_Multifunctional_Reactor_for_the_Fast_Pyrolysis_of_Biomass</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Cyclonic pyrolysis and gasification of lighter ag residues in the 1970s and 1980s required recirculation of pyrolysis gases to maintain high mas flow in the reactor while limiting air or reactive gases. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Tom<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></a></p><span style='mso-bookmark:_MailEndCompose'></span><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Ken Boak<br><b>Sent:</b> Thursday, October 13, 2016 2:53 PM<br><b>To:</b> Discussion of biomass cooking stoves <stoves@lists.bioenergylists.org><br><b>Subject:</b> SPAM: Re: [Stoves] Charcoal from waste - home cooking or other markets? (Re: Crispin, Anand Karve)<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><div><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Andrew & list<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>Hello again after a few years off.<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>I like the high thermal mass cyclone burner idea.<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>Pyrolyse the sawdust into char in a micro cyclone ( Think Dyson Root 8, Root 12 technology - but cast in alumina refracory material)<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>Char drops into a hopper - pyro gases are separated and go to a burner to keep the cyclones hot.<br><br><o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>regards<br><br><o:p></o:p></p></div><p class=MsoNormal>Ken<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 13 October 2016 at 22:19, <<a href="mailto:ajheggie@gmail.com" target="_blank">ajheggie@gmail.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><p class=MsoNormal>[Default] On Thu, 13 Oct 2016 09:46:26 -0500,Paul Anderson<br><<a href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>> wrote:<br><br>>Rebecca, I do not know of any "small, reasonable size" method to make<br>>raw sawdust directly into charcoal.<br><br>As I said Chardust in Kenya initially did it in a simple down draught<br>burner.<br><br><br>>Of course it can be done in<br>>scientific laboratories, and probably in some expensive pyrolyzer-style<br>>large burners at some sawmill that wants heat, or in some fluidized bed<br>>gasifier that sprays in the sawdust (utilizing its small particle<br>>size). I hope that somebody has a brilliant idea someday for a small<br>>inexpensive method, but not being done yet, as far as I know.<br><br>There have been many ways to pyrolyse sawdust, I was told of one where<br>the sawdust was metered into the exhaust of a diesel generator, I bet<br>that made some smoke.<br><br>One can envisage a simple vortex burner of high thermal mass being<br>initially heated up by the sawdust and later the sawdust would<br>centrifuge to the side and then down whilst the offgas burned in the<br>upper area, the radiant heat from the walls then further carbonising<br>the sawdust as it fell.<br><br>Alex has shown how a chip stoker can be set to produce char and make<br>use of the heat, whether the char produced is marketable is another<br>matter.<br><br>In the Chardust case it looks like there is still lots of vendor's<br>waste char fines which is easier picking than making fresh from<br>sawdust.<br><br>Andrew<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Stoves mailing list<br><br>to Send a Message to the list, use the email address<br><a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br><br>for more Biomass Cooking Stoves, News and Information see our web site:<br><a href="http://stoves.bioenergylists.org/" target="_blank">http://stoves.bioenergylists.org/</a><o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>