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Bioethanol
BIOLOGY
Taiyo Hamada
What is Ethanol ? Ethanol - also known as ethyl alcohol
Its the intoxicating agent in fermented and distilled liquors; used pure or denatured as a solvent
Ethanol from corn It is made by yeast from
sugars. Fuel ethanol is highly concentrated to remove the water and blended with other compounds.
It is done from the process called fermentation, yeast produces CO2 after eating sugars and produce ethanol as a waste.
Ethanol pollution
Ethanol is releasing lots of carbon monoxide and also Volatile organic compounds (VOC) is being released by the ethanol plants, this is dangerous and pollutes the water supplies.
Ethanol pollution 2
The FUMES are produced when fermented corn is dried and selling for sale as a food for animal. Thermal oxidizers can be attached to the plants to burn off the dangerous gases.fume = a gas or vapor that smells strongly or is dangerous to inhale.
BIOLOGY II
Stephen Huang
CHEMISTRY
Suyeon So
Property of Ethanol Molecular formula: C2H50H
Colorless, inflammable liquid
Burns with smokeless blue flame
Hydroxyl group Hydrogen Bonding
Ethylene Hydration and Fermentation
Flash point: 13°C
Density: 0.789 g/cm3
Property of Gasoline
Molecular formula: C8H18
Yellow color, volatile and inflammable liquid
Vaporizes at the low temperature
Burns with black smoke and red flame
Oil refineries (distillation)
Flash point: 43°C
Density: 0.720 g/cm3
Combustion of Ethanol C2H50H(l) + 3O2(g) 2CO2(g) + 3H20(l)
50 L of Ethanol ≈ 50000cm3
50000 × 0.789 = 39450g
Number of Ethanol moles: 39450÷46.08 ≈ 856.120 moles
Mole ratio of Ethanol and CO2 gas – 1:2
Number of CO2 moles: 1712.240 moles
Amount of CO2 gas produced
1712.240 mol × 44.01g = 75355.6824g
≈ 75.356 kg
Combustion of Gasoline C8H18(l) + 12.5 O2(g) = 8CO2(g) + 9H2O(l)
50L of Gasoline ≈ 50000cm3
50000 × 0.720 = 36000g
Number of Gasoline moles: 36000÷114.26 ≈ 315.071 moles
Mole ratio of Gasoline and CO2 gas – 1:8
Number of CO2 moles: 2520.568 moles
Amount of CO2 gas produced
2520.568mol × 44.01g = 110930.198g
≈ 110.930 kg
35.574 kg
MORE!!
PHYSICS
Aileen Frotten
Efficiency of Energy
2.6 gallons of corn 1 gallon of ethanol
131,000 BTU = corn production, conversion to 1 gallon pure ethanol.
3 sets of distillation processes to separate 8% ethanol from 92% water. More treatment+energy to produce ethanol (99.8% pure)
77,000 BTU = energy 1 gallon ethanol provides
131,000 - 77,000 = 54,000 BTU net energy loss
It takes more energy to produce the ethanol than the ethanol actually provides! EXTREMELY inefficient!
Ethanol Fermentation and Purification Experiment
Purpose: To understand the amount of energy input required to produce ethanol
Fermentation
(get materials info from Suuchan)
Therefore, original mass is XXXXX
Purification
Blah….
Final mass: 26/50 mL Ratio: x/XXX mL (XXX=beginning mass) X=
This means that XX% of the entire process became waste
Experiment
Experiment ResultsTrial Mass of
EthanolDensity
1 9.99 0.999
2 9.82 0.982
3 9.79 0.979
4 9.74 0.974
5 9.26 0.926
Average Density of our purified ethanol = 0.9712
Density = Mass/VolumeVolume is a constant (10cm cubed)
Self Reflection