<div style="text-align: left;">anand,<br><br>the difficulty in answering the question of "what does pyrolysis make" is that it changes so much with temp, ramp rate, residence time and physical form of the fuel (which changes temp, ramp rate and residence time as a second order problem). you know this, but still the desire for a general answer is attractive. <br>
<br>one place to look is reed's "biomass gasifier tars: their nature, formation and conversion". this will give you some info on how gas compositions change with different temp pyrolysis. this uses the primary, secondary and teritary classificaiton method. <br>
<br> the digital copy is here, but better to buy the fancy hardcopy from <a href="http://www.woodgas.com">www.woodgas.com</a>. <br><a href="http://www.osti.gov/bridge/product.biblio.jsp?query_id=1&page=0&osti_id=3726">http://www.osti.gov/bridge/product.biblio.jsp?query_id=1&page=0&osti_id=3726</a><br>
<br>the thersites site on tar dewpoints also has some interesting classifications of tars by ring number. see here: <a href="http://www.thersites.nl/">http://www.thersites.nl/</a><br><br>in general the answer is very vague and always changing. there is much more variability in pryolysis than in any of the other processes in a gasifier. well controlling it i think is a key to better gasifier outcomes. sadly, it is the process most ignored when people are trying to fix the gasifier.<br>
<br>traditional designs treat pyrolysis as the thing that just happens as a result of everythign else. many problems follow from this. many opportunities for making things better are missed.<br><br>j<br><br><br><br></div>
<br><div class="gmail_quote">On Mon, Jan 24, 2011 at 4:33 PM, Anand Karve <span dir="ltr"><<a href="mailto:adkarve@gmail.com">adkarve@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div> </div>
<div>Does your book contain the percentage composition of the fraction that remains gaseous at room temperature (carbon dioxide, carbon monoxide, hydrogen, methane and water vapour)? It is the gaseous fraction that would serve as fuel analogous to biogas. The rest of the chemicals are most probably components of the tar, which condenses at room temperature.</div>
<div>Yours</div>
<div>A.D.Karve<br><br></div>
<div class="gmail_quote"><div class="im">On Mon, Jan 24, 2011 at 11:08 AM, Jeff Davis <span dir="ltr"><<a href="mailto:jeff0124@velocity.net" target="_blank">jeff0124@velocity.net</a>></span> wrote:<br>
</div><blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;" class="gmail_quote"><div class="im">Dear Dr. Karve,<br><br>Many variables:<br><br><<a href="http://bioweb.sungrant.org/Technical/Biopower/Technologies/Pyrolysis/Default.htm" target="_blank">http://bioweb.sungrant.org/Technical/Biopower/Technologies/Pyrolysis/Defaul<br>
t.htm</a>><br><br>"Handbook of Biomass Downdraft Gasifier Engine Systems" by Dr. Tom<br><br>CO, CO2, H2, H2O, CH4 and tar vapor<br><br><br>Jeff<br><br><br><br>On Sun, 2011-01-23 at 09:24 -0800, Anand Karve wrote:<br>
</div><div class="im">
> I would like to know the composition of pyrolysis gas<br><br><br><br><br></div>--<div class="im"><br>________________________________________________<br><br><a href="http://www.puffergas.com/" target="_blank">www.puffergas.com</a><br>
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