>On fuel quality we have to be "whiter than white" and be seen to be >so. > >Dave
Hi Dave Indeed yes. You raised some previous questions about quality. >High FFA fats can be acid esterified - see Alecs Kak's recipe on >www.journeytoforever.org. However, I would add that you do need to >titrate. High levels of FFA need longer in the acid stage so how long >is enough if you don't know the FFA content. <snip> >I'm not convinced the calorific value is as good as plain base >reacted ester so would appreciate what you find out on that. Also: >I have tested some ester made using the acid/base/base process. It >worked fine and I got less byproduct than when I use the normal >base/base process. However, on base/base ester, my car's fuel trip >computer will register about 44 mpg after about 5 miles of 70mph >driving. > >With the acid/base product it would struggle to 40mpg under the same >conditions. Yesterday I added 4 gals of base/base to the tank which >already contained about 4 gals of acid/base fuel. Within 5 miles, my >trip computer was showing 44mpg and rising. This is the second time I >have had this result, so it's not a oneoff event. > >We need to be careful. If we try to sell acid/base fuel as being the >same as base/base fuel then we have to be sure it really IS the same. > >I'm sure my acid reacted fuel lost something - oxygens maybe? Is it >simply stripping the glycerols from FFA, leaving the FFA to mix in >with the ester made by the base reaction process? This could explain >the low calorific value. > >Proper research is needed on this question. I forwarded this to Aleks. Here's his response. "Biodiesel has a lower calorific value per litre than triglics mixes (oil/fat). If he does make more mpg on base bio, this means that he is driving on something else than methyl esters. I presume that this would be a mix of methyl/mono-/di-/(possible tri-) glcerids. That's called sloppy biodiesel. True, it packs more carbon into the cylinders, but it also emits acroleins. I'm (almost) ashamed to say : I use it (offroad). It really packs more power because it has a higher density. On the other hand, I can see my exhaust fumes and this isn't quite good. "Re titration - determinig exact reaction time is a pain because ffa levels vary wildly. I established two categories: 1. up to heavily used liquid fat and medium used solid fat : 1.75 hrs 2. more than medium used solid fat and up : 2.25 hrs Longer reaction times just cost time and energy. You get a little better results, but the price is high." Best Keith Addison Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.com/2000/biofuel/biofuel.htm To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
