[Gasification] SVO emissions (was Re: Torrified woodchips as a gasifier fuel)

[Harmon Seaver]

Rolf Uhle wrote:
> Hallo Max,
> 
> I�ve read your mail twice to make shure.Does it say you have no clue on why 
> you feel " wvo or svo is much, much more pollutant than mineal diesel" ?
>

    Max's arguments about all the hidden costs is irrelevant as far as
I'm concerned. We could go on in infinitum about the hidden costs of
everything. What we were talking about here was Ken's exhaust when
burning veggie oil. I then made the statement that SVO or WVO is much
more polluting than fossil diesel or biodiesel. There are any number of
studies to support that, here's one:

http://www.eng.yale.edu/images/StudResearchInfo/ME_ELLIS_GEIST_WIZNIA.PDF

   If you google "SVO emissions" you'll find many more. However, what
you also will find is that there is a lot of variation in how the
conversion was done and who did it, and to what diesel engine. How hot
the oil is kept, even what brand injection pump and injectors -- all can
make a difference. But generally, yes, SVO puts a lot more pollution out
the exhaust pipe than fossil diesel, and biodiesel is a lot cleaner
burning than either.
   Now there is a newer conversion technology which looks like it solves
that problem.
http://journeytoforever.org/biodiesel_svo.html#Elsbett
   But if it's just the older conversion of simply heating the oil and
starting and stopping on diesel/biodiesel, then yes, I think the
research shows pretty clearly that burning SVO is pretty dirty. No
sulfur, but plenty of PM and unburnt hydrocarbons, and also a lot of
phosphorus.
   And to add to the confusion, it also looks like "how" the oil was
extracted even makes a difference.
http://search.atomz.com/search/?sp-q=SVO+emissions&sp-a=000807b3-sp00000000





-- 
Harmon Seaver