Originally posted by Mr. Boston: If they can do 85 why not 100?
quote:I read gas was added for safety to make any fire visible. Alcohol fires are practically invisible. I don't think alcohol is that hard to ignite.
Originally posted by Shannow: They can do 100%, but fuels with a single boiling point are notorious for hard starting.
quote:My sources tell me it takes 70% of the energy to produce ethanol -- a bit of a gain. Methanol has a net negative energy return. Petrol has an extremely high rate of energy return. The amount of energy used to pump, refine, and distribute petrol is negligible compared with the energy it provides. I forget the numbers, but it's orders of magnitude better than ethanol. That's why we still use oil. We're looking for alternative fuels mainly for geopolitical reasons. You won't find the Arab world using alternative fuels for a long while. Brazil has a long growing season. They can grow double the crops with the same amount of land when compared with the US.
Originally posted by thooks: It is expensive to produce Ethanol from Corn because the end product (Ethanol) has a negative BTU rating....
quote:Nobody ever thinks about how much energy it takes to refine crude into gasoline or diesel when presenting this arguement. I'd be safe to say the refining process is much more involved than that of ethanol production, and would quite possibly require more energy to produce than it does ethanol. Without knowing, this is only a hunch, but I'd like to see the same numbers used against ethanol for its "negative energy content" compared to gasoline, then we'll compare notes.
Originally posted by thooks: It is expensive to produce Ethanol from Corn because the end product (Ethanol) has a negative BTU rating. Plain engrish: It takes more BTU's (Diesel fuel, gasoline, etc.) expended to grow the corn, harvest it, process it, transport it than you get out of it buy selling it to the consumer. Does that make sense? Bottom line is we need to move to producing it from other sources (switch grass, wood chips, etc).