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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Paul ,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> I did many times fusions with pure KOH
.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>At 350° C it melts and is very aggesive to
dissolve ceramics Al2O3 and SiC powders . (Diamond recup. )<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It is verry verry hygroscopic and the
hydroxyde airosols with water in the air gives your nose sense alcalic .<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Your brain makes the link to urine . but
not the real potasium make it .<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It goes not into gas but sputers airosols
has a special creep effect out of a creuset .! Even after cooling .<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Also a battery and fuel cel with KOH . It
creeps in a isolated conductor for <st1:metricconverter ProductID="20 cm"
w:st="on">20 cm</st1:metricconverter> after years ,and destroys manny apparati
.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>KOH Is colourless but Nickel gives yellow.salts
.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>It does not become K2O2 becouse to destroy
SiC we must ad Na2O2 to oxydize the carbide .<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Potasium is to measure with flame spectro
440 um purple colour in a hydrogen flame . (Sodium =yellow . Cupper =green Sr
=red<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Sorry ,I drink no coffe ! But
have a friend who drinks pee ….<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Frans<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
stoves-bounces@lists.bioenergylists.org
[mailto:stoves-bounces@lists.bioenergylists.org] <b><span style='font-weight:
bold'>Namens </span></b>Paul Olivier<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> zaterdag 15 oktober
2011 9:07<br>
<b><span style='font-weight:bold'>Aan:</span></b> <st1:PersonName w:st="on">Discussion
of biomass cooking stoves</st1:PersonName><br>
<b><span style='font-weight:bold'>CC:</span></b> Will Rutherford; loren
cardeli; CHRISTA ROTH<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> [Stoves] why does
coffee husk biochar smell like urine?</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Christa,<br>
<br>
Do you have any idea why coffee husk biochar smells like urine?<br>
<br>
I just read that coffee husks contain 36% to 38% K2O.<br>
This supposedly accounts for the low melting point of its ash.<br>
That its ash has a low melting point makes sense to me,<br>
since, if I leave the fan on a bit too long after the gasification cycle is
finished,<br>
I see a stony yellowish/white ash at the bottom of the reactor.<br>
<br>
How is this possible that coffee husks could have so much K2O?<br>
What happens to the K2O when it is subjected to heat?<br>
I see that K2O has a melting point > <st1:metricconverter ProductID="350C"
w:st="on">350C</st1:metricconverter>.<br>
If subjected to heat does it turn into K2O2 or even KO2?<br>
At what point does it turn into a gas?<br>
<br>
Does the presence of K2O account for its urine smell?<br>
What does this urine smell mean with regard to the value of coffee husk
biochar?<br>
Would coffee husk biochar be rich in potassium?<br clear=all>
<br>
Paul<br>
-- <br>
Paul A. Olivier <br>
27C Pham Hong Thai Street<br>
Dalat<br>
Vietnam<br>
<br>
<o:p></o:p></span></font></p>
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