I forwarded some of the homebrew information for making your own biodiesel to my brother who is a chemical engineer. This is what I got back this morning…too funny not to post:
“Hi Kerry,
It pisses me off that competent, prudent people can be sued and lose their life savings when they did everything right, and then you see wackos manufacturing biodiesel in their living rooms and promoting the practice! First of all, I don’t know much about biodiesel, but here is my quickie assessment:
Regarding performance claims - I find it hard to believe that a homemade product with variable quality can “make your diesel motor run better, last longer, and run cleaner.” I’m sure a refinery engineer would beg to differ in opinion. By the way, it’s an engine, not a motor.
Regarding the economics – I can’t understand how one can take ingredients costing over $1.00/gal, blend them up, generate a 20% waste stream, use lots of energy for heat and mixing, and end up with a product that costs $0.60/gal. I guess the oil is considered free (though here in Houston, spent cooking oils are sold for around $1/gal and recycled as low grade lube oils such as chain lube). Also, I guess these environmentalist-types are dumping the 20% glycerine stream and the 100% vol/vol wash water emulsion down their kitchen drains.
Regarding the legal aspects – it appears the home-based manufacturers of biodiesel don’t intend to pay fuel taxes. This could be the single reason the economics work – but it could get them in trouble.
Regarding the technical aspects – biodiesel may be common in the future, but I WOULD NOT be manufacturing it anywhere around my house. Think of it as a modern day moonshine still. Find some remote mountain land and make it there. It scares me that this article claims to be disclosing all the safety requirements you need to know, then they script a procedure that involves heating methanol mixtures. Holy Cow! Methanol has a flash point of 50F and is poisonous. It is one of the most dangerous chemicals I sell and all equipment around it must be explosionproof – no arcing light switches, blenders and the like.
Regarding the practicality – who has 2 days of manufacturing and 3 weeks of “drying” time on their hands? Obviously, you’ll need several batch reactor vessels and a storage tank – unless of course this is just a curiosity.
Regarding one last nit-pick – the following quote surprised me: “Still, for every gallon of vegetable oil you use, that’s one gallon of fossil-fuel saved, and that much less carbon in the atmosphere.” Either the author doesn’t realize that SVO contains hydrocarbons, or he is smarter than I think and he expects your vehicle to be stranded on the side of the road – which might just be one step toward saving this planet.
Later.”
I sent him some more biodiesel info and can’t wait for the next response.
Last biodiesel article…