Propane and Natural gas are both excellent fuels for engines. Both have higher octane than gasoline and would allow for very high compression and therefore efficient engines. In addition natural gas is the lowest in CO2 emissions of the fossil fuels. Propane has seen periods of popularity in tractors etc. however natural gas has not. The deal breaker for natural gas is that it remains a gas even at very high pressures, propane is easily converted to liquid. For example, at an ambient temperature of 100 degrees natural gas remains a gas 5000 psi, propane is a liquid and 190 psi at this temperature. Even at 5000 psi a tank of natural gas contains much less energy than a similar tank of liquid fuel, limiting the range or run time between fill ups. In addition equipment to handle the high pressures is costly. That's it in a nut shell.
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Today's Featured Article - Reflections of the Fifties - by "Country" Elliott. I remember rowing up in the 1950�s in a small, rural town in northwestern New Jersey. The closest town to ours was only 3 miles away, and there were seven dairy farms in the areas of these two country towns. We had 5 acres, and because my Dad was a salesman and not a dairy farmer, he let the Bockovens, who owned the Willow Tree Dairy farm most of our land.
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