Carbon Tetrachloride CCl4 (13.3 Lb/gallon) has a vapor pressure of 91.3 Torr at 20 F,
freezes at - 10 F, boils at 171 F and develops 132 PSIG pressure at 352 F,
a heat of vaporization of 90 BTU/LB, with a Carnot efficiency of 22.4% working between
those two temperatures. It's vapor would make a great "steam" for a Closed Cycle Solar powered
engine (even with the collector on top of a vehicle and a CNG backup heater).
There are safety risks that need to be taken into account though. In the military in early1950s
we used it like wash water. It was also used in the fire extinguisher in our one-room grade school
where I was in the top 3rd of our class (there were three of us)
"Carbon tetrachloride was produced in large quantities to make refrigerants and propellants for aerosol cans, as a solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins, and as a grain fumigant and a dry cleaning agent. Consumer and fumigant uses have been discontinued and only industrial uses remain."
Frederick
