<div>Dear Stovers and Gasifiers,</div>
<div>just as Tom Reed became nostalgic, I too would like to go back into the past. I obtained my Ph.D. in 1960 in plant physiology and conducted research in Botany and agriculture till the 1990s.. In the early part of the decade of 1990s, my daughter, Dr. Priyadarshini Karve, introduced me to the subject of biomass based energy. She also obtained a personal computer at that time, which I too used in my spare time. In this way I got introduced to the group interested in stoves. In 2003, I developed the technology of urban biogas plants which used food waste as feedstock rather than dung. When I started reporting this in seminars and conferences, the audience used to hoot me out, because the textbooks said in those days that non-dung substances could be fed into a biogas plant, but that they had to be co-fermented with dung. People started believing me only after I received the Ashden Award in 2006 for this discovery. And now, within just 10 years of my discovery, urban biogas systems using food waste as the sole feedstock have found worldwide acceptance.</div>
<div> Indian agriculture generates annually 800 million tons of waste biomass. Indian cities generate annually 200 million tons of organic waste. Taken together, this waste has more than three times as much energy as the petroleum that India annually imports. Using the old technologies of biogas, producer gas and coal gas, we can easily stop importing petroleum altogether. As one of the participants in the discussion on this topic mentioned, we now have much better materials, catalysts, control systems etc., so that we can revive these old technologies and make them work more efficiently. I have been going around, giving lectures on this topic for the last one year and I thought that this theme would be enthusiastically taken up by the Indian scientists and engineers, but whomever I talked to, came up with text book references and gems of traditional wisdom, showing how it could not be done. I am now an old, retired scientist, having no access to any modern workshop or laboratory. So the only thing I can do is to appeal to the youngsteers to take up work on this theme so that the problems of waste disposal and depleting fossil fuels can both be simultaneously solved. </div>
<div>Yours</div>
<div>A.D.Karve<br><br></div>
<div class="gmail_quote">On Sun, Mar 18, 2012 at 7:20 PM, Marc Pare <span dir="ltr"><<a href="mailto:mpare@gatech.edu" target="_blank">mpare@gatech.edu</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote">Dear. A.D. Karve,
<div><br></div>
<div>Careful about compressing producer gas:</div>
<div><br></div>
<div>From Bear at All Power Labs</div>
<div><a href="http://gekgasifier.com/forums/index.php/topic/193-gas-storage/" target="_blank">http://gekgasifier.com/forums/index.php/topic/193-gas-storage/</a> <br></div>
<div><br></div>
<blockquote style="BORDER-BOTTOM:medium none;BORDER-LEFT:medium none;PADDING-BOTTOM:0px;MARGIN:0px 0px 0px 40px;PADDING-LEFT:0px;PADDING-RIGHT:0px;BORDER-TOP:medium none;BORDER-RIGHT:medium none;PADDING-TOP:0px">
<div><span style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px">Energy - If you want to minimize the volume, you'd think of compressing it. The energy density becomes an issue again. The energy used by the compressor seriously starts to use the potential energy in the gas you're compressing.</span></div>
<div><br style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px"></div>
<div><span style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px">Reversion - I don't have the specific numbers, but <b>CO is not stable will revert to solid carbon and O2 over time. The rate will increase with compression.</b></span></div>
<div><br style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px"></div>
<div><span style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px">Most importantly:</span></div>
<div><span style="LINE-HEIGHT:22px;BACKGROUND-COLOR:rgb(255,255,255);FONT-FAMILY:helvetica,arial,sans-serif;COLOR:rgb(40,40,40);FONT-SIZE:14px">Safety - <b>The produced gas has very high levels of CO. Storing, and especially compressing, the gas leads to risks of rapid release of the gas. THIS IS NOT SAFE.</b></span><b> </b></div>
</blockquote>
<div><br clear="all">Marc Paré<br>B.S. Mechanical Engineering<br>Georgia Institute of Technology | Université de Technologie de Compiègne<br><br>my cv, etc. | <a href="http://notwandering.com/" target="_blank">http://notwandering.com</a><br>
<br><br>
<div class="gmail_quote">On Sun, Mar 18, 2012 at 6:17 PM, Anand Karve <span dir="ltr"><<a href="mailto:adkarve@gmail.com" target="_blank">adkarve@gmail.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote">
<div>Dear Friends,</div>
<div>thanks for enlightening me about molecular sieves. From the information received from members of the gasification and pyrolysis group, it appears to be within the realm of possibility to produce pyrolysis gas without nitrogen. This opens up the possibility of bottling nitrogen free producer gas and using it as automotive fuel. Even a TLUD stove would burn much better if supplied with primary air without nitrogen. </div>
<div>Yours</div>
<div>A.D.Karve<span><font color="#888888"><br clear="all"><br>-- <br>***<br>Dr. A.D. Karve<br>Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br><br><br></font></span></div><br>_______________________________________________<br>
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<br>-- <br>***<br>Dr. A.D. Karve<br>Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br><br><br>