This was brought up on another forum. I'm going to link folk from there to here so we can either learn something new or dispell a myth.

Please review the below and pipe in any information you have that will uphold or dispute the below comments. BOTH type of responces are encouraged.

quote:

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Originally posted by TomJ
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(Biodiesel) does not have Glycerine, buring it does not produce Acrolein (mean and toxic s**t!), UNLIKE SVO or WVO. This is a serious environmental impact reason NOT to use SVO or WVO. .......

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Full quote found HERE.

Acrolein is in petroleum products like gas and is also in tabacco so it could be in Veggie oil also.

I can not see it being more harmful than what is being burned in gas fuel vehicles. Most people do eat it after it has been heated to 350 degrees F.

That is all I know on the subject.

Where is the proof? Can anybody submit links to studies.

Incomplete combustion of glycerine does produce acrolein; that is a fact. I have no idea what quantities are produced by burning tri-, di- and mono-glycerides though. Remember that there is no significant free glycerine in svo.

Acrolein is a nasty chemical, too. It does nasty things to people. The studies I have read did not mention it as a factor to consider in the tailpipe emissions from svo, so I can't really comment further at this stage.

H

Study on svo use:

http://www.dft.gov.uk/stellent/groups/dft_roads/documents/page/dft_roads_027622.pdf

H

There was a lot of interesting stuff there HCR. I didn't see any reference to acrolein in the paper however but I could have missed it. Did anyone spot it, or has anyone seen another paper in which acrolein was found? Acrolein is very pungent, and severely stings eyes and nose, so that if it was present in WVO fuel exhaust I think it would be easily recognized, and hence well known.

I did some web surfing looking for acrolein yesterday and I found it is available in gasoline exhaust from trifling to stifling amounts depending on all sorts of variables. The most common path to producing it is apparently pyrolysis. I expect if you keep your airflow good this can be avoided.

Glenn

I am almost certain that there is no mention of acrolein in that report. I have heard anecdotal evidence of biodiesel exhaust being pungent and overpowering, which led me to believe that there was a possibility of free (and possibly combined) glycerine undergoing incomplete combustion. I have never heard of this from the use of svo though, although of course there are far fewer academic papers pertaining to this than to biodiesel.

H

By the way, that report is all the more interesting for me as I have just bought a Peugeot 106 and booked it in to have an Elsbett kit fitted.

H

An online resource I found stated that acrolein is indeed very toxic. But it also said that environmental exposure to it via auto exhaust is almost non-existent.

Why? Acrolein is supposedly highly reactive and does not survive long in the environment. Human exposure therefore is limitied.

quote:

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Originally posted by revOILutionary:
.. Acrolein is supposedly highly reactive and does not survive long in the environment. Human exposure therefore is limitied.

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Thanks much Rev. Do you have a link to this one website?

Sorry folk. Got in a hurry and put some of my acrolein questions etc. in a differnt post by accident.

See HERE For more info.