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"Food Grade" propylene glycol? - Page 3

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Posted by DJ on September 28, 2005, 5:24 pm

Steve Spence wrote:

Well there ya go. Should have read down a bit first... Didn't know
glycerin was in the glycol production tree... There. I learned
something today.

Kinda cool the way this all comes together, this renewable stuff. Make
biodiesel to burn in a generator, say, end up with glycerin. Make
glycol from the glycerin, and put it into a heat exchanger (simple
coiled loop) around the genny exhaust to do some space heating with
hydronics ;-).


Posted by Paul on September 29, 2005, 3:29 am

  Steve, do you do any cogeneration for heat with your diesel generator?

Posted by Steve Spence on September 29, 2005, 11:42 am
 Paul wrote:

Yes, the heat from the engine is used to keep the veggie oil liquid with
a coolant loop in the fuel drum.

Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net

Posted by nicksanspam on September 29, 2005, 12:40 pm

Sounds like that only uses a tiny fraction of the heat.


Posted by Brian Graham on September 28, 2005, 4:56 pm
 Making Biodiesel can be done too.  Check out this article.

In case you think that article is bogus, here's another site:

or do a search yourself.

(The inventor is now recanting his story.. lol)

FYI - I read that making biodiesel also produces glycol that can be used to
         make antifreeze. Even better payback.

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