"John Li" <[EMAIL PROTECTED]> wrote: "I tried using the mixture of refined coconut oil (FFA removed) 20 parts to one part kerosene, just like what the Thai teacher did. The result was very impressive: smokeless and almost odorless. The smell is just like heating oil in the pan. There is no drop in the power. Then I referred my testing to the government agency. They told me that this is vey dangerous because it will emit acrolyn, which is a cancerous substance. They said that the correct process should be that the coconut oil undergo transesterification to produce methyl ester, which is safe. Any comments about this?"
My comment is the obvious one - the substance they probably mean is acrolein (acrylic aldehyde), presumably from glycerine. If your engine is in good tune and at full temperature, I see no reason to expect significant aldehyde emissions. One of the beauties of diesels is that they operate at high excess air ratios, something gasoline (petrol) engines can't do. Glycerine and everything else should burn to carbon dioxide and water, with a small amount of nitrogen oxides emissions from crevice combustion. In short, normal diesel emissions. Finally, if your car were producing significant levels of acrolein in the exhaust, the stink would be overpowering, yet you describe it as "almost odorless." I wouldn't put too much credence in this "warning." It appears to be motivated by the fact that you're burning a mixture of veggie oil and kero, neither of which pays road fuel taxes in most countries. When a way is found to tax this blend as a motor fuel, the bureaucrats will no doubt discover that it's just fine after all. Best, Marc de Piolenc Iligan, Philippines PS. What are you paying for coconut oil? For kero? Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
