Dear Peter and All: (There are two "Toms" often writing to this site, Tom Reed and Tom Miles, both quite knowledgable in biomass pyrolysis and gasification. I suggest you add the REED or MILES to the "dear tom"s". )
I know (and admire) Tom Miles. He's very knowledgable, but hides it modestly under a sunny manner. Also has a wonderful family. (How's Molly?0 I am 89 (in my 90th year) and Tom Miles is considerably younger, but I'm not sure how much.... I'm in excellent health, and expect to live another few decades. I have four children and 7 grandchildren, 1 GGC, now 1 year old. Hope to have another dozen before I leave. Thomas (Binnington) Reed Thomas B Reed 280 Hardwick Rd Barre, MA 01005 508 353 7841 > On May 20, 2015, at 3:30 PM, Peter Davies <[email protected]> wrote: > > Dear Tom, > > I hope this finds you well, I noticed your post to the list below and thought > I would share some of our recent success with you. Our system is not a TLUD, > but it is not a conventional downdraft either and was described by a visiting > scientist as "A descending bed downdraft". It is nonetheless perhaps of > interest in regard your balances below. > > We have been getting formal gas analysis through SGS here in Australia (NATA > certified lab results) as follows: > > CO - 15% > H2 - 30% > CH4 - <1% > CO2 - 8% > N2 - balance. > > This with a co-product yield of around 20% of charcoal (dry basis)...Starting > with wood chips @22% mc. > > The 2:1 ratio of H2:CO suggests the extra H2 is coming from the moisture > cracking. > > Gas sampling was undertaken using a purpose built column designed to give > uniform mixing and flow at the sampling point and the sample was taken using > a certified SGS vacuum flask for such sampling. (pic attached). I have also > included a couple of files from recent testing on pelleted cotton gin trash > (which is giving similar test results to wood chip). The flare video was > taken 3 minutes after first start-up onsite, cold bed no char in starting > sample. I was simply using the hand held butane torch to see if any CO was > beginning to come through (you see a color change around the butane flame), I > had just begun telling my wife that it looked like it was not far off from > ignition.... No filtering beyond a cyclone and simple condensate trap. The > other picture is carbonised cotton pellets that come out as the co-product, > they have a higher value as char than their embedded energy in Australian > situations. > > cheers, > Peter > > > > >> On 21/05/2015 3:57 AM, Tom Reed wrote: >> Dear Anand and All: >> >> Thanks for your comments. I am so glad that the TLUD principle, first used >> in our cook and camp stoves about 1985, is finding broader uses now. It >> depends on the facts: >> >> Wood is comprised of 80% Cellulose and only 20% lignin >> >> When the fuel is lit ON TOP, the cellulose is vaporized: >> >> Celllulose, a great fuel which breaks down about 330 C to form H2 and CO >> >> C6H10O5 + heat ===> 5 CO + 5 H2 + C >> >> This gas is useful for cooking and running engines. >> >> The 20% lignin in the wood is uniformly converted to charcoal. >> >> This works on wood at any scale. The cellulose gas is relatively clean and >> is fine for cooking as is. For engine use, passing the gas through a >> container of previously produced charcoal is sufficient to cool and clean it >> for engine use. >> >> Yours for clean cellulose gasification and char production, >> >> TOM REED >> >> Thomas B Reed >> 280 Hardwick Rd >> Barre, MA 01005 >> 508 353 7841 > > -- > Peter Davies > Director > ID Gasifiers Pty Ltd > Delegate River, Victoria > Australia > Ph: 0402 845 295 > > <Bedding in test gasifier.wmv> > <char pellets.jpg> > <gas sampling.jpg> _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
