Thanks for clarifying.
On Sun, Oct 3, 2010 at 11:37 PM, Ken Calvert <[email protected]> wrote: > Derek, if you have good gas it will have a lot of hydrogen in it, but you > can barely see a hysdrogen flame its not yellow its transparent. if you > have yellow its carbon volatiles, and if there are flecks of yellow in the > flame its unburnt carbon.- The blue color is carbon monoxide.Thats what you > look for. Ken C. Original Message ----- From: "derek schulze" < > [email protected]> > > To: "Discussion of biomass pyrolysis and gasification" < > [email protected]> > Sent: Monday, October 04, 2010 3:58 PM > Subject: Re: [Gasification] cherry pits again > > > > 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 >> > > > > _______________________________________________ > 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
