[Gasification] CHARCOAL PYROPILE
Dan Nave
nave1 at comcast.net
Sat Feb 25 16:43:56 CST 2012
Tom,
You said, "our brush saw attachment for chain saws will cut limbs up to 2-1/2" in diameter as small
as you want the charcoal pieces"
Are you selling these? I can not locate them on the web or your site. Please give a link.
Thanks,
Dan
On 2/21/2012 2:41 PM, Thomas Reed wrote:
> Dear Anand and All:
>
> Depending on the type of charcoal needed, you don't need a kiln at all. the biomass should have a
> moisture content less than 20% and cut into small enough pieces so you can make a reasonably dense
> pile. (If you have a pile of slash, resulting from cutting a tree down, our brush saw attachment
> for chain saws will cut limbs up to 2-1/2" in diameter as small as you want the charcoal pieces).
>
> If you make a pyramid of scrap biomass (sticks, twigs, chips, pellets, cobs, ...) and light it ON
> TOP, the cellulose will form a combustible gas, leaving about 20% charcoal from the lignin. The
> top layer of charcoal will ignite the next layer, and each layer. Until allis converted to
> charcoal, the rising deoxygenated gases protecting the charcoal layers above.
>
> If you put wet newspaper under the pile, when the last layer is converted, the rising steam will
> quench the pile of charcoal. I call this a CHARCOAL PYROPILE.
>
> Depending on the moisture content of the biomass pile, the temperature of the charcoal will reach
> 500-700C. I believe HughMcLaughlin said it was partially activated, but I hope he'll comment.
>
> I hope that farmers in particular will develop this method for converting waste biomass to
> valuable charcoal fertilizer.
>
> So no kiln needed.
>
> Tom Reed
>
>
>
>
>
> Thomas B Reed
>
>
> On Feb 20, 2012, at 9:23 AM, Anand Karve <adkarve at gmail.com <mailto:adkarve at gmail.com>> wrote:
>
>> Dear Darius,
>> if you want to char biomass, you must have a kiln for charring it. The kilns are mainly of two
>> types. In the oven and retort kiln, the biomass is filled into a closed vessel which is heated
>> from outside. The pyrolysis gas escapes through a vent in the vessel, leaving the charred matter
>> behind. The renaissance painters used to make their charcoal sticks by using this process. Also
>> Yuri Yudkevich in Russia uses this type of a kiln for making charcoal on a commercial scale. In
>> the TLUD type of kin, which is generally used by most others, the biomass is filled into the
>> kiln, which is open at the top and which also has holes in the bottom for allowing fresh air into
>> the kiln. The biomass is ignited from the top, so that the fire traverses downwards. The air
>> needed for maintaining the fire comes into the kiln through the holes at the base of the kiln. It
>> rises up and the oxygen in the air is consumed by the burning biomass. Therefore this kiln is
>> called the Top Lit Up-Draft (TLUD) kiln.
>> Yours
>> A.D.Karve
>>
>> On Mon, Feb 20, 2012 at 9:17 PM, darius tamizi <darius_tamizi at hotmail.com
>> <mailto:darius_tamizi at hotmail.com>> wrote:
>>
>> Dear Mr. Wu, Mr.Karve
>>
>> Thank you very much for the paper and explantion. I can undestand the theory, but I do not
>> know how the apparatus looks like (exp. Oven with N2) and how can I do all the explanation
>> without the apparatus. Could you help me more about it?
>>
>> Regards,
>>
>> Darius
>>
>>
>> ----------------------------------------------------------------------------------------------------
>> Date: Mon, 20 Feb 2012 10:21:15 +0800
>> From: adkarve at gmail.com <mailto:adkarve at gmail.com>
>> To: gasification at lists.bioenergylists.org <mailto:gasification at lists.bioenergylists.org>
>> Subject: Re: [Gasification] Active charcoal
>>
>> Dear Darius,
>> 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.
>> Yours
>> A.D.Karve
>> On Sat, Feb 18, 2012 at 11:01 PM, Darius <darius_tamizi at hotmail.com
>> <mailto:darius_tamizi at hotmail.com>> wrote:
>>
>> Dear Dr. A.D. Karve
>>
>> Charring material are rubber wood.
>>
>> Could you tell me the detail process?
>>
>> Regards,
>>
>> Darius
>>
>> On 2/18/2012 9:56 PM, Anand Karve wrote:
>>
>> Dear Darius,
>> 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.
>> Yours
>> A.D.Karve
>> On Sat, Feb 18, 2012 at 10:14 PM, Darius <darius_tamizi at hotmail.com
>> <mailto:darius_tamizi at hotmail.com>> wrote:
>>
>> Dear all,
>>
>> Is somebody there can help me to convert our char into active charcoal?
>>
>> Regards,
>>
>> Darius
>>
>>
>> Dr. A.D. Karve
>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>>
>>
>>
>>
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>> --
>> ***
>> Dr. A.D. Karve
>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>>
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>> ***
>> Dr. A.D. Karve
>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
>>
>>
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