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<DIV><FONT face=Arial size=2><STRONG>Hi Rolf,</STRONG></FONT></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>In answer to these
two questions:</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><FONT face=Arial size=2>I have also thought about the cold char
acting as a filter for the tars in <BR>the distillation fumes so as to enrich
the biochar with these, but so far I <BR>have never found any comments on
this.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG>Charcoal makes a good filter for
particulates, but if the pyrolisis gas from a charcoal kiln is anything less
than say 475C, the tars will just condense and quickly block the filter bed. You
will also find the gas ducts will block if the temperatures
drop.</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The filtered gases would go through an engine to be
completely burnt.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG>Unfortunately, this would be very unlikely
to succeed, as pyrolisis gas would need to be wet scrubbed to grab all the
condensable tars. The toxic black liquor is then a environmental disposal
issue.</STRONG></DIV>
<DIV> </DIV>
<DIV>What do you use as a binder?</DIV>
<DIV> </DIV>
<DIV><STRONG>Depending on the type densification, you can use the tar if
collected from a condenser, or more user friendly starch powders from a variety
of crops.<BR></STRONG><BR></DIV>
<DIV><STRONG>Hope this will help to keep your hands clean (:-)</STRONG></DIV>
<DIV><STRONG></STRONG> </DIV>
<DIV><STRONG>Doug Williams,</STRONG></DIV>
<DIV><STRONG>Fluidyne.</STRONG></DIV>
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