<div>Dear Kevin,</div>
<div>this work was done by a graduate student as a project. At that time he used our charring equipment, but did not tell us the name of the chemical or its concentration. It was only later that the Student's guide told me about calcium chloride, when I met him at a conference. Apparently, one can also use potassium carbonate. The dry sugarcane leaves were dipped into 5% solution, removed and dried in the sun. The charcoal was tested in their laboratory to verify if it was active or not. I don't think anybody actually makes activated carbon on a commercial scale by this method. That is why I told Darius that he should conduct his own experiments and test it. <br>
Yours</div>
<div>A.D.Karve<br></div>
<div class="gmail_quote">On Tue, Feb 21, 2012 at 1:14 AM, Kevin <span dir="ltr"><<a href="mailto:kchisholm@ca.inter.net">kchisholm@ca.inter.net</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT:#ccc 1px solid;MARGIN:0px 0px 0px 0.8ex;PADDING-LEFT:1ex" class="gmail_quote"><u></u>
<div bgcolor="#ffffff">
<div><font face="Arial">Dear AD</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Very interesting!!</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Is the charcoal that is activated by CaCl2 "good for everything that activated charcoal is good for", or is it perhaps equally good for some tasks, but not necessarily as good for all?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">What applications have you used the CaCl2 activated charcoal in?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">What % by weight CaCl2, would you use?</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Thanks!</font></div>
<div><font face="Arial"></font> </div>
<div><font face="Arial">Kevin</font></div>
<blockquote style="BORDER-LEFT:#000000 2px solid;PADDING-LEFT:5px;PADDING-RIGHT:0px;MARGIN-LEFT:5px;MARGIN-RIGHT:0px" dir="ltr">
<div style="FONT:10pt arial">----- Original Message ----- </div>
<div style="FONT:10pt arial;BACKGROUND:#e4e4e4"><b>From:</b> <a title="adkarve@gmail.com" href="mailto:adkarve@gmail.com" target="_blank">Anand Karve</a> </div>
<div style="FONT:10pt arial"><b>To:</b> <a title="gasification@lists.bioenergylists.org" href="mailto:gasification@lists.bioenergylists.org" target="_blank">Discussion of biomass pyrolysis and gasification</a> </div>
<div style="FONT:10pt arial"><b>Sent:</b> Sunday, February 19, 2012 10:21 PM</div>
<div style="FONT:10pt arial"><b>Subject:</b> Re: [Gasification] Active charcoal</div>
<div><br></div>
<div>Dear Darius,</div>
<div> Normally one needs relatively high temperature to make active charcoal, but the pretreatment with calcium chloride allows us to make active charcoal even at relatively low temperatures. We make charcoal from light biomass like agricultural waste and use a TLUD type kiln. You would have to conduct experiments using your biomass and your process of charring to see if this pretreatment works in your case or not. <br>
Yours</div>
<div>A.D.Karve<br></div>
<div class="gmail_quote">On Sat, Feb 18, 2012 at 11:01 PM, Darius <span dir="ltr"><<a href="mailto:darius_tamizi@hotmail.com" target="_blank">darius_tamizi@hotmail.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 bgcolor="#FFFFFF" text="#000000">Dear Dr. A.D. Karve<br><br>Charring material are rubber wood.<br><br>Could you tell me the detail process?<br><br>Regards,<br><br>Darius<br><br>On 2/18/2012 9:56 PM, Anand Karve wrote:
<blockquote type="cite">
<div>Dear Darius,</div>
<div>what material are you charring? We make our charcoal from leaves of sugarcane, which are discarded during the process of sugarcane harvest. By soaking the leaves in 5% solution of calcium chloride, dying them and then converting them into char in a TLUD kiln gives us active charcoal. We have not tested this process in the case of woody material. Perhaps you can do this experiment. <br>
Yours</div>
<div>A.D.Karve<br></div>
<div class="gmail_quote">On Sat, Feb 18, 2012 at 10:14 PM, Darius <span dir="ltr"><<a href="mailto:darius_tamizi@hotmail.com" target="_blank">darius_tamizi@hotmail.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 bgcolor="#FFFFFF" text="#000000">Dear all,<br> <br>Is somebody there can help me to convert our char into active charcoal?<br><br>Regards,<br><br>Darius<br><br> <br>Dr. A.D. Karve<br>Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br>
<br><br></div></blockquote></div><br>
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