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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=NL-BE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Paul,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> First cracking wood gives H20 out of its O+2H <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dry wood is called 15% H2O content ……<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Wett wood 16-30% H2O ;needs 3 years drying .<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Biomass with leaves just cut 60% H20 !<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>LABO dry means 24 h at 120 °C for 1cm thick .<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Analytic is for definitions . Charcoal makers may think different .<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You get enery from 1Kg wood= 4KWh.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>If you like the half now out of your wood,you can it ,during pyrolysis .<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You like the other half out your charcol LATER ….You can ,and evitting rotting !.Get easy distribution .<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You NEED enery to get cracking ; but that energy is not LOST …..Use it for something the same time !<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>F.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=NL style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>Van:</span></b><span lang=NL style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>Namens </b>Paul Anderson<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>To all.<br><br>Thanks for the explanation of 47%C<br>Something is still not clear:<br><br><o:p></o:p></p><p class=MsoNormal>Beginning with the baseline fuelwood use of 187,800 kg of fuelwood per year per village, if we assume a 10% moisture content, the baseline fuelwood is equivalent to 170,700 kg of dry fuelwood. <o:p></o:p></p><p class=MsoNormal>I can accept that. That is about 5 kg of wood per household per day.<br><br><o:p></o:p></p><p class=MsoNormal>We assume that dry mass can be converted to carbon mass using 47%C (Ryan et al., 2011),<o:p></o:p></p><p class=MsoNormal>I do not yet accept this (above). Dry biomass is carbohydrates. C and O and H, in the approximate proportion of CH<sub>2</sub>O (Tom Reed has more refined proportions, but I cannot find it at this moment) . H has almost no weight. The O (at atomic weight 16) is a bit heavier than C at 12.. So when the O is gone during pyrolysis, about half of the total dry weight (47%) is attributed to carbon. That much is fine.<br><br>But during pyrolysis, almost half of the carbon leaves the scene in the form of pyrolytic combustible gases that include C atoms. How much of the C gets converted into graphine sheets of charcoal can vary with the pyrolysis temperature. When pyrolysis is at less than 450 deg C, some of the carbon still hangs around in tarry / greasy content inside of charcoal, but it is not the same as the carbon of the charcoal.<br><br>So, if the dry wood is 170,700 kg, and half of the weight leaves as exiting oxygen atoms, then that would be what the article said was<br><br><o:p></o:p></p><p class=MsoNormal>resulting in 80,240 kgC per year per village. <o:p></o:p></p><p class=MsoNormal>But that is the TOTAL of carbon. About half of that C is gone in the pyrolytic gases, leaving about 40,100 kg C per year per village.<br><br>Did I miss something? Am I talking about something different? I am here to learn. <br><br>But if I am correct, what are the implications for the Jagger article? <br><br>Paul<br><br><br><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>