Recovery of near-anhydrous ethanol as gasoline additive from fermentation products

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Recovery of near-anhydrous ethanol as gasoline additive from fermentation products (EN)

Boukouvalas, C (EN)
Markoulaki, E (EN)
Tassios, D (EN)
Magoulas, K (EN)

N/A (EN)

The use of near-anhydrous ethanol, obtained from fermentation products through low pressure distillation, as a gasoline additive is examined. To this purpose, a reliable model for predicting the azeotropic composition of an ethanol-water mixture as a function of the pressure is presented. It is developed by considering the available thermodynamic consistent experimental data and using the Wilson and the Virial equations for the liquid- and vapor-phase nonideality, respectively. It is concluded that, for an area with no extremely cold winters-minimum ambient temperature - 20°C-alcohol with 96.5% (wt) purity can be used in a %/lo (vol) gasohol mixture. Such an alcohol can be produced with a single distillation column operating at 140 mmHg pressure with an energy consumption of 5150 kJ/kg of product; or with a system of two columns with lower energy consumption but higher capita1 cost. These energy consumptions are very sensitive to the accuracy of the predicted azeotropic composition at the operating pressures. © 1995 by Marcel Dekker, Inc. (EN)


Ambient temperatures (EN)
Gasohol mixtures (EN)
Distillation (EN)
Azeotropic composition (EN)
Energy consumption (EN)
Experimental data (EN)
Ethanol (EN)
Distillation columns (EN)
Lower energies (EN)
Organic polymers (EN)
Fermentation (EN)
Gasoline additives (EN)
Operating pressure (EN)
Energy utilization (EN)
Ethanol water mixtures (EN)
Gasoline (EN)
Vapor Phase (EN)
Anhydrous ethanol (EN)
Reliable models (EN)
Cold winter (EN)
Low pressures (EN)
Nonideality (EN)
Fermentation products (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Separation Science and Technology (EN)



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