RE: [Biofuel] uses for charcoal -- (was) simple cook stoves
Hi All, We use activated carbon in our gold recovery processes... simply put, Activated Carbon can be made by heating the carbon (coconut shells are very good and typical sources being hard and structurally robust) in an oxygen deprived (not necessarily 100% oxygen free) environment such as gas fired or electrically heated) kiln. Operating temperatures are typically in the region of 700 to 800 degrees celcius giving it a maroonish red colour. The heat drives off the organics and most other contaminants. The carbon is then chilled by dumping it into water creating more pores i.e. surface area for reactions to take place or become adsorbtion centers. Rural informal operation would normally burn the crushed coconut shells in a pit covered with a layer of soil or ashes to keep most the oxygen out... just enough to have a sustainable burn of the carbon (exothermic) without losing too much mass. Jurie Vorster (Metallurgist in Gold Extraction via Cyanide and Carbon) South Africa -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Pannir P.V Sent: 08 May 2005 12:31 To: [EMAIL PROTECTED] Subject: Re: [Biofuel] uses for charcoal -- (was) simple cook stoves Helo Mike , Dean Thomas and Steve The process of making or activating carbon can be simple chemical treatments to remove the inorganic metal using acids , steam oxidation of organic materials or ethanol solvent removal of oganic materials. By using appropriate filter media and support the Lye formation can eliminated and hence no need to bother as Steve thinking , as solvent can form lye surely. Steve , the poor really drink lye, water with impurities in several part of the rural areas of the worldand what we want to do is to filter the lye using activated carbon I am not able to find the results about ethanol solvent activation as this is novel and new process. Here Keith can come out with the recent work in this fields from the data banks , even though I have tried to do so with out success. For rural area this simple process is more favourable l than industrial conventional methods . sd Pannirselvam Brasil On 5/6/05, Michael Redler [EMAIL PROTECTED] wrote: A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ -- Pagandai V Pannirselvam Universidade Federal do Rio Grande do Norte - UFRN Departamento de Engenharia Qumica - DEQ Centro de Tecnologia - CT Programa de Ps Graduao em Engenharia Qumica - PPGEQ Grupo de Pesquisa em Engenharia de Custos - GPEC Av. Senador Salgado Filho, Campus Universitrio CEP 59.072-970 , Natal/RN - Brasil Residence : Av Odilon gome de lima, 2951, Q6/Bl.G/Apt 102 Capim Macio EP 59.078-400 , Natal/RN - Brasil Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
Hello Pannir, - Original Message - From: Pannir P.V [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, May 12, 2005 2:59 AM Subject: Re: [Biofuel] uses for charcoal -- (was) simple cook stoves Thank you very much Balaji You are welcome. We have lot of cocunut husk hsk here all wasted . we suerly need you help for this project development Can you give us some details about the low cost brick or ceramic gasificatio units for rural areas . Coconut husk by itself has very low bulk density and high moisture. To meet dryness needs of the process (10%), you need to firstly dry the biomass with waste heat from the exhaust of the engine generators/combustor at zero thermal energy cost. To meet denstiy requirements, you can blend coconut husk with other waste biomass such as wood, coconut shell and fronds. We had tried out equal measures of coconut husk, shell and fronds and this gasified very well. Considering your social orientation with emphasis on employment and income generation in Braziil's rural areas, you can derive coir a value added product from coconut husk. After rettting the biomass in water, the fibres are separated and twisted into hardy ropes which do not easily biodegrade even in the presence of water, owing to high lignin content. Remember the coir ropes in our village wells, which last ages? The residual powdery coir pith left from coir manufacture is very light weight and contains a lot of moisture. This will need to be binderless briquetted after drying and can also be gasified. We use a lot of insulation material both as themal and chemical barriers (not exactly ceramics) to protect the steel shell of the reactor core (~1600 deg C ) I remember IISc had tried to develop a low cost ceramic model in the early nineties, but it was not rugged enough for long term operation. In fact, if you look for extended and trouble free plant operation and life, low cost is at a discount. No pun intended :-) What about any new news from IIsc gasifaction adopted to rural areas. The first gasifiers installed in Hosahalli and Hanumanthanagara villages in Karnataka are still functional. a 20 kWe duel fuel system is installed in your own Univeristy of Sao Paulo. Another 25 kWe systems is installed in Butachaques island in Chile and services the need of the remote red Indian community there. Only 44% of rural households in India are electrified. The Ministry of Power in India has an ambitious scheme of providing power for all the remaining 78 million rural housholds in over 100, 000 villages in the next 5 years. We hope to contribute our mite to this effort. 100% gas engine generators in the 10. 20, 30, 40 kW range are now under test http://powermin.nic.in/whats_new/pdf/Rajiv_gandhi.pdf Thanking you yours sincerly P.V.Pannirselvam Regards balaji ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
Hello Pannir, Mike, Thomas and Steve, The open top down draught reburn gasification process developed by Indian Institute of Science and used in our power and thermal systems generates about 5% of the biomass feed as charcoal, having ~ 80% fixed carbon and Iodine Value of 450 -550. ( This IV is a measure of the mg of Iodine adsorbed per gm of charcoal and is different from the IV used to determine unsaturation in organic compounds such as fattty acids. Mehtylene Blue and CCl4 Carbon Tetra Chloride are other chemicals used to index the adsorptivity of carbon). We have developed a simple thermal activation process, where the dry charcoal as above is held at 800 Deg C for a period of 2 - 3 hours and then cooled enhancing the Iodine Value to 800. Most municipalities in the country are mandated to use Activated Carbon of IV 500 to remove colour, odour and possibly some microbes. The online tap water filters in India use a variety of finely divided silver doped Activated Carbon which has higher IV. As you rightly point out, the inorganics (and some of the organics as well) are eluted with dilute mineral acid, the cheapest being dilute HCl, when more of the surface gets opened up, increasing the IV. This has particular relevance to rural areas, where power can be generated at the pit head, so to speak and the charcoal used as an organic filter to provide clean drinking water from contaminated ground water. We are implementing a UNDP funded grid connected rural electirfication project in Karnataka where we hope to realise some of these ideas. I shall highly appreciate any leads to the study of ethanol's effect on the IV/surface area of charcoal. Regards. balaji - Original Message - From: Pannir P.V [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, May 08, 2005 4:01 AM Subject: Re: [Biofuel] uses for charcoal -- (was) simple cook stoves Helo Mike , Dean Thomas and Steve The process of making or activating carbon can be simple chemical treatments to remove the inorganic metal using acids , steam oxidation of organic materials or ethanol solvent removal of oganic materials. By using appropriate filter media and support the Lye formation can eliminated and hence no need to bother as Steve thinking , as solvent can form lye surely. Steve , the poor really drink lye, water with impurities in several part of the rural areas of the worldand what we want to do is to filter the lye using activated carbon I am not able to find the results about ethanol solvent activation as this is novel and new process. Here Keith can come out with the recent work in this fields from the data banks , even though I have tried to do so with out success. For rural area this simple process is more favourable l than industrial conventional methods . sd Pannirselvam Brasil snip ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
Thank you very much Balaji We have lot of cocunut husk hsk here all wasted . we suerly need you help for this project development Can you give us some details about the low cost brick or ceramic gasificatio units for rural areas . What about any new news from IIsc gasifaction adopted to rural areas. Thanking you yours sincerly P.V.Pannirselvam On 5/11/05, Balaji [EMAIL PROTECTED] wrote: Hello Pannir, Mike, Thomas and Steve, The open top down draught reburn gasification process developed by Indian Institute of Science and used in our power and thermal systems generates about 5% of the biomass feed as charcoal, having ~ 80% fixed carbon and Iodine Value of 450 -550. ( This IV is a measure of the mg of Iodine adsorbed per gm of charcoal and is different from the IV used to determine unsaturation in organic compounds such as fattty acids. Mehtylene Blue and CCl4 Carbon Tetra Chloride are other chemicals used to index the adsorptivity of carbon). We have developed a simple thermal activation process, where the dry charcoal as above is held at 800 Deg C for a period of 2 - 3 hours and then cooled enhancing the Iodine Value to 800. Most municipalities in the country are mandated to use Activated Carbon of IV 500 to remove colour, odour and possibly some microbes. The online tap water filters in India use a variety of finely divided silver doped Activated Carbon which has higher IV. As you rightly point out, the inorganics (and some of the organics as well) are eluted with dilute mineral acid, the cheapest being dilute HCl, when more of the surface gets opened up, increasing the IV. This has particular relevance to rural areas, where power can be generated at the pit head, so to speak and the charcoal used as an organic filter to provide clean drinking water from contaminated ground water. We are implementing a UNDP funded grid connected rural electirfication project in Karnataka where we hope to realise some of these ideas. I shall highly appreciate any leads to the study of ethanol's effect on the IV/surface area of charcoal. Regards. balaji - Original Message - From: Pannir P.V [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, May 08, 2005 4:01 AM Subject: Re: [Biofuel] uses for charcoal -- (was) simple cook stoves Helo Mike , Dean Thomas and Steve The process of making or activating carbon can be simple chemical treatments to remove the inorganic metal using acids , steam oxidation of organic materials or ethanol solvent removal of oganic materials. By using appropriate filter media and support the Lye formation can eliminated and hence no need to bother as Steve thinking , as solvent can form lye surely. Steve , the poor really drink lye, water with impurities in several part of the rural areas of the worldand what we want to do is to filter the lye using activated carbon I am not able to find the results about ethanol solvent activation as this is novel and new process. Here Keith can come out with the recent work in this fields from the data banks , even though I have tried to do so with out success. For rural area this simple process is more favourable l than industrial conventional methods . sd Pannirselvam Brasil snip ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ -- Pagandai V Pannirselvam Universidade Federal do Rio Grande do Norte - UFRN Departamento de Engenharia Qumica - DEQ Centro de Tecnologia - CT Programa de Ps Graduao em Engenharia Qumica - PPGEQ Grupo de Pesquisa em Engenharia de Custos - GPEC Av. Senador Salgado Filho, Campus Universitrio CEP 59.072-970 , Natal/RN - Brasil Residence : Av Odilon gome de lima, 2951, Q6/Bl.G/Apt 102 Capim Macio EP 59.078-400 , Natal/RN - Brasil Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
I'm afraid not. The charcoal used in filtration is activated charcoal, which is made by burning bone or similar material in an oxygen-deprived environment. If you try to filter water through charcoal briquettes or wood, I believe the output is LYE. You could make soap with the lye I suppose, but if you drink the output you'll be a very unhappy camper. -Steve A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
I'm sure I will be corrected if I am wrong but I seem to remember from one of my other groups that charcoal would need to be converted to activated carbon via super heated steam this steam opens up millions upon millions of microscopic pores on the carbon which attract impurities in things like water and alcohol. After some reading apparently Charcoal can be used but it will need to be treated. This is regurgitated information and I can not guarantee its accuracy especially because of my bad memory : ) 1st. Soak the charcoal in a very good solvent to dissolve the tars present in the pores Ethanol is very good for this as it wont kill you. 2nd. Boil the charcoal in water for 15 minutes and then pour the water of the top to remove the floaties. Repeat until no more are present. 3rd. Heat in an oven at high temp until dry. 4th. Soak in clean water before using. You can search the archives here for info on Activated Carbon and Charcoal http://archive.nnytech.net/sgroup/distillers/ Or you can download a free Ebook on activated carbon from here http://www.home-distillation.com/free_ebook.html Hope this helps. Dean. Michael Redler wrote: A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
contain different chemicals some of them poisonous and/or carcinogenic. Dean. Dean Thomas wrote: Hi Michael, I'm sure I will be corrected if I am wrong but I seem to remember from one of my other groups that charcoal would need to be converted to activated carbon via super heated steam this steam opens up millions upon millions of microscopic pores on the carbon which attract impurities in things like water and alcohol. After some reading apparently Charcoal can be used but it will need to be treated. This is regurgitated information and I can not guarantee its accuracy especially because of my bad memory : ) 1st. Soak the charcoal in a very good solvent to dissolve the tars present in the pores Ethanol is very good for this as it wont kill you. 2nd. Boil the charcoal in water for 15 minutes and then pour the water of the top to remove the floaties. Repeat until no more are present. 3rd. Heat in an oven at high temp until dry. 4th. Soak in clean water before using. You can search the archives here for info on Activated Carbon and Charcoal http://archive.nnytech.net/sgroup/distillers/ Or you can download a free Ebook on activated carbon from here http://www.home-distillation.com/free_ebook.html Hope this helps. Dean. Michael Redler wrote: A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
Thanks Dean. I went on the premise that purifiers were made of charcoal (so far, so good) but, had no background on how it's prepared. I think you just discovered that I'm not a chemist. :-) Mike Dean Thomas [EMAIL PROTECTED] wrote: Also Just be careful obviously charcoal from different sources will also contain different chemicals some of them poisonous and/or carcinogenic. Dean. ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
Re: [Biofuel] uses for charcoal -- (was) simple cook stoves
Helo Mike , Dean Thomas and Steve The process of making or activating carbon can be simple chemical treatments to remove the inorganic metal using acids , steam oxidation of organic materials or ethanol solvent removal of oganic materials. By using appropriate filter media and support the Lye formation can eliminated and hence no need to bother as Steve thinking , as solvent can form lye surely. Steve , the poor really drink lye, water with impurities in several part of the rural areas of the worldand what we want to do is to filter the lye using activated carbon I am not able to find the results about ethanol solvent activation as this is novel and new process. Here Keith can come out with the recent work in this fields from the data banks , even though I have tried to do so with out success. For rural area this simple process is more favourable l than industrial conventional methods . sd Pannirselvam Brasil On 5/6/05, Michael Redler [EMAIL PROTECTED] wrote: A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/ -- Pagandai V Pannirselvam Universidade Federal do Rio Grande do Norte - UFRN Departamento de Engenharia Qumica - DEQ Centro de Tecnologia - CT Programa de Ps Graduao em Engenharia Qumica - PPGEQ Grupo de Pesquisa em Engenharia de Custos - GPEC Av. Senador Salgado Filho, Campus Universitrio CEP 59.072-970 , Natal/RN - Brasil Residence : Av Odilon gome de lima, 2951, Q6/Bl.G/Apt 102 Capim Macio EP 59.078-400 , Natal/RN - Brasil Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 Telefone(fax) ( 84 ) 215-3770 Ramal20 2171557 ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
[Biofuel] uses for charcoal -- (was) simple cook stoves
A while back, we had a discussion on simple cook stoves. http://infoarchive.net/sgroup/biofuel/46479/1 I was wondering if some of the charcoal collected from the stove could be used as a water purifier. I quickly checked the archives to see if it was already discussed and didn't find anything. Mike ___ Biofuel mailing list [EMAIL PROTECTED] http://wwia.org/mailman/listinfo/biofuel Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuel archives at Infoarchive.net (searchable): http://infoarchive.net/sgroup/biofuel/
