Dear Otto Good point about NOx. I can report that in many tests, perhaps a few hundred, I have not noticed any natural draft or fan stove being able to make any significant quantity of NO3 at all, only a tiny amount of NO2, and small amounts of NO. The N mostly turns into N2 which it is happy to be. Biomass is about 1% Nitrogen. NO is almost always less than half of a tenth of a percent of the emissions. Often it is less than half of a hundredth of a percent.
NO forms at 700 C and higher. In many cases there is only a small portion of the combustion area that reaches that temperature. In fact the NO level can be used to give an indication of the temperature of the flames even if they can't be seen. In a cool fire the NO(EF) which is the NO measured multiplied by the dilution factor will be about 100 ppm(v). I have seen very well contained and air-constrained coal stoves reaching NO(EF) 850 ppm though it is not common. High carbon fuels run in the 450-750 range (coal, large charcoal fires, paraffin). Biomass is half or less. The reason the NO level is so low is because there is no compression involved like inside an engine. From everything I have seen there is no risk from NOx from any available domestic stove because they run too cool to make much. The big culprit is CO which forms easily in cool fires. Regards Crispin -----Original Message----- Since there is some content of N (nitrogen) in the seed cake we are afraied it might give some NOX from the emmision, when used as fuel, tests will tell. _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address Stoves mailing list 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://www.bioenergylists.org/ [email protected] http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
