<x-charset ISO-8859-1>Bob, > but is it really a problem? I would be more concerned about carbon > monoxide, undetectable, than acrolein, which has a very acrid irritating > odor, and hence detectable.
I would tend to believe that acrolein is more of an emissions problem at the stack than as an indoor pollutant in all but the worst homemade furnaces. Just as biodiesel has gone through its regulatory hoops in order to achieve acceptability, so too would boilers and furnaces that might burn the glycerin cocktail. To date the commercial units are only rated as acceptable (by the US EPA) for waste motor oils, hydraulic and transmission fluids. I imagine another series of tests would need to be conducted to achieve a rating suitable for the combustion of glycerin or mixed glycerin. And even if that test weren't conducted to meet EPA standards, it probably should be done to some degree just from a knowledge standpoint to know whether a problem is actually being resolved (disposal of the glycerol) or another problem is actually being created (undue acrolein emissions). Todd Swearingen ----- Original Message ----- From: "bob allen" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Tuesday, February 17, 2004 8:39 AM Subject: Re: [biofuel] Glycerol Disposal > Tom I agree with your post, just the chemist in me must jump in briefly > > [EMAIL PROTECTED] wrote: > > >The quick answer is no. Glycerin is a very viscous liquid, and the > >solidification point varies with the soap in it, the residual alcohol, and the > >completeness of the reaction. It is sometimes solid at 65 degrees F. What's more, it > >is dirty until it is at least partially refined. If there is no methanol > >recovery, it will have a volatile component and a refractive component. Glycerin > >flash point is over 800 degrees, and a waste oil burner will burn the volatile > >part, but not the refractive part, > > > the glycerin and other organic components will burn, but the sodium or > potassium hydroxide will be converted to their solid oxide forms (ash) > which may be a problem > > > which will quickly gum up the works. > > > >If glycerin is burned without enough air it may form a poisonous acroline > > > > thats spelled acrolein, but your right about its formation, > but is it really a problem? I would be more concerned about carbon > monoxide, undetectable, than acrolein, which has a very acrid irritating > odor, and hence detectable. > > >compound. If you look at the structure of a glycerin molecule you will see three > >carbon-oxygen double bonds, > > > actually only single bonds, but yes it is "partially burned" > > > which are hard to break and take a lot of energy > >input. Carbon-oxygen double bonds are effectively carbon monoxide, meaning that > >the molecule is effectively partially burned already, and has a relatively > >low heat value per pound. > > > >A good glycerin burner handles a semi solid well, or preheats until it is a > >liquid. It has a fire starter of some other fuel, hopefully biodiesel or WVO, > >to get it up to temperature so the glycerin will burn. Then it has enough > >insulation to maintain this temperature, or at least has minimal heat withdrawal so > >the fire is not extinguished. It also has adequate air for clean combustion. > > I had to build this system because no standard burner does these things > >well. It is a masonry heater with a babington burner for a fire starter, burning > >WVO, and a secondary fuel feed for the glycerin. There are no visible > >emissions, and I hope that indicates a clean burn. > > > >Tom Leue > > > > > >In a message dated 2/16/04 1:30:45 PM, [EMAIL PROTECTED] writes: > > > > > > > > > >>In a message dated 02/16/2004 11:47:33 AM Eastern Standard Time, > >>[EMAIL PROTECTED] writes: > >>Burning glycerine > >>If I understand this correctly, I can take the by product from the > >>biodiesel. > >>That nasty looking stuff from the bottom of the processor and burn it in my > >>waste oil burner with no problem. I have a factory bought waste oil heater > >>that I burn all the crankcase oil from the trucks that I work on. Is this a > >>correct statement? > >> > >>Rick M > >>Brownstown, Mi. > >> > >> > >> > > > > > > > > > > > > > >----------------------------- > >Homestead Inc. > >www.yellowbiodiesel.com > > > > > > > >[Non-text portions of this message have been removed] > > > > > > > > > > > >Biofuel at Journey to Forever: > >http://journeytoforever.org/biofuel.html > > > >Biofuels list archives: > >http://infoarchive.net/sgroup/biofuel/ > > > >Please do NOT send Unsubscribe messages to the list address. > >To unsubscribe, send an email to: > >[EMAIL PROTECTED] > >Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > -- > ------------------------------------------------------------------ > Bob Allen,http://ozarker.org/bob > ------------------------------------------------------------------ > ----------------------------------------------------------------- > The modern conservative is engaged in one of Man's oldest exercises > in moral philosophy; that is, the search for a superior moral > justification for selfishness JKG > -------------------------------------------------------------------- > > > > [Non-text portions of this message have been removed] > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://infoarchive.net/sgroup/biofuel/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > Yahoo! Groups Links > > > > > > ------------------------ Yahoo! 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