Dear Crispin Go to bed as promised. Please do not dig yourself deeper into the 97% H2:Co hole until instruimental interference has been ruled out.
Good night H On 17 September 2013 21:43, Crispin Pemberton-Pigott < [email protected]> wrote: > Dear Frank**** > > ** ** > > >Charcoal largely burns C > CO2 and converts some of it back to CO in the > hot zone above the hot coals. *[Frank >] *Above the hot coals or in the > hot coals? To convert back from CO2 > CO we need more carbon. **** > > ** ** > > I found that directly above the middle of a good stove (under the pot) > there is zero CO – I was amazed. But nearer the edges there is more.**** > > ** ** > > >If the excess air level is high it can create a lot of CO directly and > not burn it. *[Frank >] *Is it because the gas is too cool? Molecules are > spread too far apart to continue the complete combustion? Not enough > hydrogen to aid in supporting continued complete combustion? **** > > ** ** > > All the above. Well done.**** > > ** ** > > * [Frank >] I find the hydrogen is less than one percent in char. But > moisture can increase the hydrogen is not tested directly after drying. > Wonder if this water hydrogen is any help in these small stoves?*** > > * * > > Well that is the question of the hour – where does all the H2 come from?** > ** > > ** ** > > I checked a number of other tests and the correlation coefficient between > CO and H2 varies a great deal. The 97.7% was interesting of course, but > some are negative and some are 50%. I don’t think this is an instrument > issue, it represents different combustion conditions, largely.**** > > ** ** > > Regards**** > > Crispin near the Forbidden City**** > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://stoves.bioenergylists.org/ > > > -- Harold Annegarn Department of Geography Environmental Management and Energy Studies University of Johannesburg Mobile +27 (0)83 628 4210 Fax +27 11 559 2430 Office +27 11 559 3927
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