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Ethiopia’s Jatropha plantation set to produce biodiesel

Ethiopia is expanding its Jatropha plantation to produce 500 million litres of biodiesel from...
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CSU receives $1.5 million to develop biofuels

Colorado State University (CSU) has been awarded nearly $1.5 million (€1.1 million) from...
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CEC gives $43.6 million in awards to advanced biofuels projects

The California Energy Commission (CEC) has awarded $43.6 million (€32.4 million) to 11...
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NASCAR reaches 6 million mile mark

The US' NASCAR race has now seen 6 million miles of competitive racing completed using an...
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Biofuels International Conference 2014
24 September 2014 - 25 September 2014
Ghent, Belgium
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3 November 2014 - 6 November 2014
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Volume 3, Issue 6

Feature: Hydrous ethanol: opportunities for supply and demand
Ethanol is produced and used in hydrous (wet) and anhydrous (dry) forms, the latter requiring an additional costly and energy consuming drying process. An opportunity therefore exists for both producers and end users in maximising the use of hydrous ethanol, this increasingly having stimulated R&D on both the supply and demand sides. Ethanol as a fuel today Hydrous ethanol is produced from distillation as an azeotropic mixture of ethanol and approximately 5% water. Due to the formation of an azeotrope, removal of the remaining water cannot be achieved by further simple distillation and an additional process is required, such as azeotropic distillation, adsorption or membrane separation. This additional process increases energy consumption, process time and both capital and operational expense. Hydrous ethanol is used as an engine fuel when unblended with hydrocarbons, although extensively only in Brazil for the passenger car fleet, and on a smaller scale in Sweden. When blended with petroleum, however, the complete miscibility observed between ethanol and water is disturbed and phase separation may occur. This requires ethanol blends to use anhydrous ethanol as a feedstock which consequently dominates fuel ethanol consumption.


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