Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Practicality of alcohols as motor fuel

Conference · · SAE Prog. Technol.; (United States)
OSTI ID:6610155
An economical and abundant feedstock for methanol manufacture is North Dakota lignite. In a plant consuming lignite and self-sufficient in utilities, energy in the methanol would represent about 45% of the energy in the feedstock. The cost of energy from the methanol produced would be about twice that from gasoline at 1979 prices. Liquefaction of lignite or coal to a synthetic crude with subsequent refining by conventional processes would provide motor fuel at somewhat higher energy efficiency and lower cost than by methanol synthesis. Municipal solid wastes could also be used as feedstock for methanol manufacture, but the cost would be even higher than with lignite as feedstock. The lowest cost and most abundant feedstock for ethanol manufacture is corn. With current farming and ethanol manufacturing practices, energy in the ethanol plus that in the byproducts is only about 55% of the energy in the petroleum fuels consumed. If the ethanol plant used only nonpetroleum fuels, the efficiency based on just the petroleum fuels used in farming and collection of wastes would range from 130 to 160%; overall efficiency would remain at 55% or less. Energy in the byproducts represents about 40% of the energy output. The cost of energy from the ethanol produced would be at least four times that from gasoline. While both methanol and ethanol have characteristics that complicate distribution and detract from product quality, poor energy yield and high cost are the most serious deterrents to commercialization of either alcohol. Methanol is definitely preferred, but neither represents a practical alternative unless the price of petroleum-based fuels rises markedly relative to that of the alcohols.
OSTI ID:
6610155
Conference Information:
Journal Name: SAE Prog. Technol.; (United States) Journal Volume: 19
Country of Publication:
United States
Language:
English