a guy showed me an article in the most recent motor trend on using ammonia as a motor fuel in a spark ignition engine. so i did a search and found this AWSOME idea. they simply had something as simple ball vale meter ammonia vapor into the engine, post turbo (since ammonia will vaporize in the tank and travel as a vapor to the engine at ~150PSI) and were able to replace up to 90% of the diesel while maintaining torque. cuts back on C02 output since "NH3" has no "C "in it.
a few problem with the idea though, if you buy a lot of anhydrous ammonia at the farmer's coop (if they will even sell it to you), the sherrif will think your making drugs in a mobile lab (the jeep). anhydrous ammonia is toxic, lethal in certain doses (say a leak in a confined garage) and pretty nasty smelling stuff. it attacks zinc and copper alloys so you cannot put it in "regular" DOT approved propane tanks with brass valves.
I could not find out how much it costs per gallon, but if its less than ~$3.00/gallon it could pay for itself in a few years, hold me over untill the Chevy volt comes out.
http://pubs.acs.org/cgi-bin/abstract.cg ... 0140f.html
I looked at this article at work and I could read it, but at home I could not. its weird website they must have checked my IP to see if my company was a paid member of the website. for a mortal it cost $25 to read the 9 pages, I have it downloaded to my work laptop.