SKBob Posted 10 December , 2007 Share Posted 10 December , 2007 I have recently been given access to the village parish magazines covering the war and on one occasion there is a report of the scout troop scouring the district to collect fruit stones, date stones and kernels of hard nuts "for an important war service vital to the welfare of our troops at the front". Can someone advise what this was for ? Thanks ladies & gents Bob Link to comment Share on other sites More sharing options...
auchonvillerssomme Posted 10 December , 2007 Share Posted 10 December , 2007 http://query.nytimes.com/mem/archive-free/...amp;oref=slogin Link to comment Share on other sites More sharing options...
Simon Jones Posted 10 December , 2007 Share Posted 10 December , 2007 It was to make charcoal for gas mask filters. S Link to comment Share on other sites More sharing options...
centurion Posted 10 December , 2007 Share Posted 10 December , 2007 I wonder what it was about nuts that made better absorbing charcoal than, say, ordinary wood. Link to comment Share on other sites More sharing options...
Doug Johnson Posted 10 December , 2007 Share Posted 10 December , 2007 Activated carbon is still used for removing gases etc and is in common use in cooker hoods etc for removing smells. Coconut shell is commonly used and it has a property where, when turned into charcoal, it ends up full of cavities which vastly increases the surface area and creates little pockets for the gas molecules to be trapped in. Depending on what gases you want removing depends on whether the carbon is coated in a chemical or not and what coating is used. Spent activated carbon can be reactivated by heating it. A more in depth explanation is beyond me. Doug Link to comment Share on other sites More sharing options...
centurion Posted 10 December , 2007 Share Posted 10 December , 2007 Doug I was aware of how carbon is used for removal of gases and particles - my question remains unanswered what is special about carbon made from nuts (other than coconut) rather than hardwood which is the usual source? Link to comment Share on other sites More sharing options...
SKBob Posted 10 December , 2007 Author Share Posted 10 December , 2007 Thanks for that chaps - most illuminating. My thoughts were way off (won't tell you what they were !) Bob Link to comment Share on other sites More sharing options...
NigelS Posted 10 December , 2007 Share Posted 10 December , 2007 Spent activated carbon can be reactivated by heating it. I believe that in doing so the gas(es) absorbed will be given off - a technique used in gas chromatography - so, not a good idea to be within nose range! Could it be that charcoal made from fruit stones contain some chemical, not contained in other forms, that gives a better, or different, adsorbtion characteristic? there must be a chemist out there who can give a definitive answer. Link to comment Share on other sites More sharing options...
NigelS Posted 11 December , 2007 Share Posted 11 December , 2007 The archives of British Pathe have some footage of scouts collecting from Buckingham Palace in 1918 see http://www.britishpathe.com/thumb_pf.php?id=89604 - not, apparently, available on line Link to comment Share on other sites More sharing options...
johnreed Posted 11 December , 2007 Share Posted 11 December , 2007 If my memory serves me correct Horse Chestnuts were used in the manufacture of cellulose and then into cordite. John Link to comment Share on other sites More sharing options...
Doug Johnson Posted 13 December , 2007 Share Posted 13 December , 2007 Centurion, Activated carbon is made from charcoal. At the time of the first world war the process was to heat the material to drive off the volatiles (to make charcoal) and to add steam to activate it. The activation produces the fissures required to remove whatever you want to remove (3 grammes is supposed to have the same surface area as a tennis court). Getting the right size fissures etc is important to what you want to remove. There are apparently some 150+ types of activated carbon all used for different purposes. Coconut was the one of the first to be used for gas masks and apricot stones, grape seeds etc all produce the right product for removal of gases from air. I think it is now possible to use wood using chemicals etc (invented by WW11) but it is a more expensive process. I have no idea though as to whether it can produce the right type of material. Regards Doug Link to comment Share on other sites More sharing options...
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