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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Good proposal.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>A char making appliance is a gas making appliance that makes char as a byproduct. By this definition it converts 85%, or less, of the solid fuel to gas. The remainder is char and ash (15%). <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>15% carbon is a reasonable reference point since it can cover a wide range of gasifier types that can be run inefficiently to make char. Efficient gasifiers will make about 3-5% char/ash. Carbon conversion is often 90-95%. Since most biomass is 50% carbon that’s 45-48% of the mass. 15% carbon would be about 7.5% of the biomass. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Tom<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>.<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='color:#1F497D'><o:p> </o:p></span></a></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Crispin Pemberton-Pigott<br><b>Sent:</b> Monday, May 06, 2013 8:07 AM<br><b>To:</b> 'Discussion of biomass cooking stoves'<br><b>Subject:</b> [Stoves] Definition of char-making appliance<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-CA>Dear Char Producers<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>What is your opinion of this definition of a ‘char making appliance’?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNoSpacing><b><span lang=EN-CA style='font-size:11.0pt;font-family:"Arial","sans-serif";background:aqua;mso-highlight:aqua'>Char Making Appliance<o:p></o:p></span></b></p><p class=MsoNoSpacing><span style='font-family:"Arial","sans-serif";background:aqua;mso-highlight:aqua'>Any appliance that derives heat largely from the pyrolysis of biomass in a manner designed to produce, as a result of such combustion, a carbonaceous byproduct high in carbon, useful as a fuel or as a ‘biochar’ and where such product contains not less than 15% of the carbon in the original fuel.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>If you have a suggestion for an alternative % of carbon, or wish to propose a mass-based metric, please provide a supporting case.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA>Thanks<br>Crispin<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA><o:p> </o:p></span></p></div></body></html>