Don't see why, if you are looking for "less polluting," that you
would contemplate used fossil fuel products as part of the fuel
compliment. Manditorily this would increase PAHs over biodiesel,
and introduce the probability of heavy metals in the emissions.
As well, if you go to a vegetable oil based lubricating oil
("synthetic"), you reduce almost entirely any PAHs that can come
from crankcase oils.Further, the biodiesel is sulfur free, permitting the inclusion of a catalytic converter to reduce NOx, where one couldn't be introduced before. (You mention this below.) Particulate traps can further reduce emissions, a considerably more easily applied technology in situations where there are constant loads, such as gensets. You mention exhaust heat, which can be used to reduce loads elsewhere when complimented with other technologies such as such as indirect heat exchange for space heating, gas absorption cooling or Stirling engines. Personally? Were it me? I'd abandon the idea of used fossil oils as a fuel compliment. Even with a turbocharger, you will not achieve as high an air to fuel ratio as is needed for highly efficient combustion. Best to use these fuels in something along the lines of combustion in a high pressure air stream, as in a boiler or space heat application for which it was designed. Todd Swearingen ----- Original Message ----- From: Christopher Witmer <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Saturday, August 03, 2002 7:37 PM Subject: [biofuel] WTK: tweaks and add-ons to make *stationary* diesels less polluting > O Fuelish Ones, > > I am trying to discover ways of making stationary diesels (e.g., > permanently installed electrical generator engines) less polluting, and > I would greatly appreciate any suggestions, ideas, avenues to pursue and > other tidbits of wisdom that might be useful. > > It stands to reason that there are a lot of things one would hesitate to > try on an automobile, but which would't present any great problems for a > diesel engine that was never moved around. > > Some possibilities that occur to me (I'm thinking out loud here and > would appreciate other ideas as well as comments if any of those listed > would seem to be unfruitful): > > * Combustion of biofuels (doh!) and (*if* they can be burned cleanly > enough) waste petroleum based lubricating oils > > * Addition of water at just the right point in the cycle > > * Addition of methane at the air intake > > * Careful filtration of both lubricants and fuels > > * Optimum use of heat coming off the engine (also cools engine better) > > * Addition of a turbocharger > > * Addition of exhaust filtration/scrubbing device(s) -- preferably > buildable and maintainable by the user! -- again, bulky size isn't so > much of an issue with the stationary engine > > * Addition of an exhaust catalytic converter *if* durable and cheap enough! > > Thanks, > > Christopher Witmer > The Fuelish Acolyte > Tokyo > > > Yahoo! Groups Sponsor > ADVERTISEMENT > > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > 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 the Yahoo! Terms of Service. > > Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ 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/
