Where applicable, the AlcoDens calculators will allow you to specify the strength (concentration) of the alcohol blend using Alcohol Proof, ABV (Volume %), Mass %, Ethanol Density, or Molar %. They will give you quick, easy and accurate determinations of your alcohol stocks and calculations of your alcohol blending, proofing, dilution and fortification ratios, plus a few extra calculations that go beyond what the tables can do for you. These programs replace the manual calculations that are usually done in conjunction with the TTB Tables, the Practical Alcohol Tables and Ethanol Density Tables. Another benefit of cellulosic ethanol is that it results in lower levels of life cycle greenhouse gas emissions.AlcoDens is a collection of 6 powerful and flexible calculators designed for distillers, blenders and bottlers of potable alcohol (ethanol). When biomass is used to power the process of converting non-food-based feedstocks into cellulosic ethanol, the amount of fossil fuel energy used in production is reduced even further. Ethanol produced from corn demonstrates a positive energy balance, meaning that the process of producing ethanol fuel does not require more energy than the amount of energy contained in the fuel itself.Ĭellulosic ethanol improves the energy balance of ethanol because the feedstocks are either waste, co-products of another industry (wood, crop residues), or are dedicated crops-such as switchgrass and miscanthus-with low water and fertilizer requirements compared to corn. Energy is required to turn any raw feedstock into ethanol. In the United States, 94% of ethanol is produced from the starch in corn grain. Ethanol’s impact on fuel economy is dependent on the ethanol content in the fuel and whether an engine is optimized to run on gasoline or ethanol. Denatured ethanol (98% ethanol) contains about 30% less energy than gasoline per gallon. Lower-octane gasoline is blended with 10% ethanol to attain the standard 87 octane.Įthanol contains less energy per gallon than gasoline, to varying degrees, depending on the volume percentage of ethanol in the blend. Minimum octane number requirements for gasoline prevent engine knocking and ensure drivability. It is also known as ethyl alcohol, grain alcohol, and EtOH (see Fuel Properties search.) Ethanol has the same chemical formula regardless of whether it is produced from starch- or sugar-based feedstocks, such as corn grain (as it primarily is in the United States), sugar cane (as it primarily is in Brazil), or from cellulosic feedstocks (such as wood chips or crop residues).Įthanol has a higher octane number than gasoline, providing premium blending properties. E15 is available from fuel terminals or through a blender pump dispenser that draws from E10 and E85 tanks at a station.Įthanol (CH 3CH 2OH) is a clear, colorless liquid.E10 is sourced from fuel terminals whereas E85 is sourced from a terminal or directly from an ethanol production facility.Feedstocks are converted to ethanol at a production facility and then transported to a fuel terminal or end-user by rail, truck, or barge.Biomass feedstocks are grown, collected, and transported to an ethanol production facility.There are several steps involved in making ethanol available as a vehicle fuel: Another blend, E15, is approved for use in model year 2001 and newer light-duty vehicles. Typically, gasoline contains E10 (10% ethanol, 90% gasoline), which reduces air pollution.Įthanol is also available as E85 (or flex fuel), which can be used in flexible fuel vehicles, designed to operate on any blend of gasoline and ethanol up to 83%. gasoline contains ethanol to oxygenate the fuel. Ethanol is a renewable fuel made from various plant materials collectively known as " biomass." More than 98% of U.S.
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