Is it possible that I am getting hydrogen burning to get the bright yellow color? There is a fair amount of moisture in the cherry pits.
On Sun, Oct 3, 2010 at 10:19 PM, Ken Calvert <[email protected]> wrote: > Derek, what you describe is like setting up an oxy acetylene blow torch. > Pure acetylene is all yellow with great shreds of carbon soot coming out > the endof the flame. As you open up the oxygen it starts getting greenish > blue at the base and ends in yellow. When you getthe oxygen just right there > is no yellow only two shades of blue, with a darker shade in the middleof > the flame and a blue violet where the yellow was. > For a good gasifier output you want that outer blue violet colour all > through. Using air instead of oxygen, you do not get the intense combustion > of the inner cone of a gas torch! Ken C. > ----- Original Message ----- From: "derek schulze" <[email protected]> > To: "Discussion of biomass pyrolysis and gasification" < > [email protected]> > Sent: Monday, October 04, 2010 1:48 AM > Subject: [Gasification] cherry pits again > > > I have managed to build my pilot project cherry pit gasifier and it is >> working with the wet pits! - well at least it is producing gas that is >> burning reliably. >> >> Now I have a couple of questions: >> >> 1) My question is regarding the color of the flame. It appears to be >> blue-ish yellow near the base, but turns yellow near the top. The yellow >> is >> not a deep orange color, but rather a bright yellow. There is little to >> no >> sooting off the flame and no visible smoke. I have made two different >> burner designs as I was concerned about proper air introduction into the >> gas >> prior to combustion with little to no change Either I am not cracking >> the >> tar adequately, or there is a lot of sodium in the pits. Any thoughts? No >> I do not have a temperature probe in the reaction zone. As I will be >> burning the gas in a boiler, I am not overly concerned about the gas, but >> I >> do not want to have excessive tar buildup if it can be avoided. >> >> 2) The gasifier was producing a lot of moisture and tar for the first >> hour >> of operation but it's production slow substantially after that. I did >> quite >> a bit of tweaking in that hour. >> >> 3) Should I be using some coal or char at the base to help improve the >> cracking? Will the ash left from the first burn be adequate? >> >> I'll post a photo/video somewhere once I get the files off the camera. >> >> -Derek >> _______________________________________________ >> The Gasification list has moved to >> [email protected] - please update your email contacts to >> reflect the change. >> Please visit http://info.bioenergylists.org for more news on the list >> move. >> Thank you, >> Gasification Administrator >> > > > > _______________________________________________ > The Gasification list has moved to > [email protected] - please update your email contacts to > reflect the change. > Please visit http://info.bioenergylists.org for more news on the list > move. > Thank you, > Gasification Administrator > _______________________________________________ The Gasification list has moved to [email protected] - please update your email contacts to reflect the change. Please visit http://info.bioenergylists.org for more news on the list move. Thank you, Gasification Administrator
