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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><b><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'>Dear Crispin,<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><snip><o:p></o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I found that directly above the middle of a good stove (under the pot) there is zero CO – I was amazed. But nearer the edges there is more.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'>[Frank >] How is that possible? I thought going from CO2 > CO could only occur be in a bed of char. This is very strange. <o:p></o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'>Regards<o:p></o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'>Frank<o:p></o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></i></b></p><p class=MsoNormal><b><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:olive'><o:p> </o:p></span></b></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>>If the excess air level is high it can create a lot of CO directly and not burn it. </span><b><i><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#003300'>[Frank >] </span></i></b><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#003300'>Is it because the gas is too cool? Molecules are spread too far apart to continue the complete combustion? Not enough hydrogen to aid in supporting continued complete combustion? </span><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>All the above. Well done.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#003300'>[Frank >] I find the hydrogen is less than one percent in char. But moisture can increase the hydrogen is not tested directly after drying. Wonder if this water hydrogen is any help in these small stoves?</span></i></b><b><i><span lang=EN-CA style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></i></b></p><p class=MsoNormal><b><i><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></i></b></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Well that is the question of the hour – where does all the H2 come from?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I checked a number of other tests and the correlation coefficient between CO and H2 varies a great deal. The 97.7% was interesting of course, but some are negative and some are 50%. I don’t think this is an instrument issue, it represents different combustion conditions, largely.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Crispin near the Forbidden City<o:p></o:p></span></p></div></body></html>