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7/23/2019 Biofuel production process
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BIO-FUELS PRODUCTION PROCESSES
BY
NAVED AHMED
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PRODUCTION PROCESS
BIOETHANOL
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BIOETHANOL PRODUCTION
Pretreatment Process:a. To soften the cellulosic material, reduction of
cellulose crystallinity, increase in the surface area
and porosity of pretreated substrate resulting inincreased hydrolysis rate.
b. Goal is to remove lignin and hemicellulose.
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BIOETHANOL PRODUCTION
Process reactions
C12H22O11+H2O 2C6H12O6.
C6H12O6+Zymase 2C2H5OH+2CO2. Distillation (EtOH BP=78.3,Water=100).
Dehydration (concentrate up to 99%).
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BIODIESEL
Produced from Lipids such as
1.Vegetable Oil
2. Soya bean Oil
3.Animal Fat
4. Jatropha plant(Non Edible)
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WHAT IS JATROPHA? Shrub: 2-3meters in height
Starts producing after 2-3 years of plantation
(produces for 35-40 years)
Seeds contain 50% oil (approx. 40% is extractable).
Oil: non-edible.
Seed production: 0.8 to 5.2 tons per acre per annum
(depending on soil and irrigation).
1kg of fruit contains 1100 seeds . 794kg fruits are grown in one hectare of land.
1 hectare of Jatropha produces 1892lit of fuel.
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PRODUCTION FROM JATROPHA
Biodiesel produced from Jatropha by three
processes.
Plantation stage
Extraction stage Transesterification
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PRODUCTION FROM JATROPHA
Extraction stage
) Mechanicaly
Oil presses have been used for the purpose of oil
extraction.
Yield=60-70%
) Chemically(Solvent extraction Process)
After grinding, use N- Haxane solvent for extractingoil.
Yield=90-95%
) Ultrasonication process
This process save time and give high yield.
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PRODUCTION FROM JATROPHA
Transesterification
Remove glycerol from triglycerides.
Chemical reaction of oil(Triglycerides)with an
alcohol in the presence of catalyst. Catalyst : NaOH/KOH
Products : Bio Diesel + Glycerin
Reaction temperature: (55-60)C
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PRODUCTION FROM JATROPHA
Transesterification:
Separating Glycerol from Jatropha Oiland form
Methyl Ester(Biodiesel).
(CH2-O-CO-R)3 + 3(CH3-0H )NaOH/( 55-60)C
Triglycerides Methanol
3(CH3-O-CO-R ) + (CH2OH)2-CHOH
Methyl Ester(Biodiesel) Glycerol
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PURIFICATION PROCESS
Glycerin is separated from methyl ester by gravity
separator.
After separation biodiesel contains 3%-6% CH3OH and
some soap.
CH3OH can be removed by vaporization and recycle
back to reaction.
Then biodiesel is washed with water to remove
residual free glycerin,CH3OH,soaps and catalyst.
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PURIFICATION PROCESS
Biodiesel:water=1:2 we can reduce water
quantity by adding acid with water.
Flash vessel is used for remove water from oil.
As water boiling point is 100C and boiling pointof biodiesel is 255C so water is converted in
vapour and biodiesel is separated.
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BIODIESEL VS CONVENTIONAL
DIESEL
Property Jatropha Oil Biodiesel Diesel
Density ----------- 0.87 0.84
Viscosity@30C 55 5.35 4.0
Calorific Value
MJ/Kg
39.5 41 45
Cetane No 43 57-62 47
Solidifying
PointC
-10 ------------- -14
Boiling PointC 286 255 248
Flash PointC 66-70 52-67
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GREEN DIESEL
Produce from
1. Soyabean oil
2. Rapeseed oil
3. Palm oil4. Tallow oil
5. Jatropha
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GREEN DIESEL
Process:
Hydro-processing of Jatropha oil with refinery
gas in the presence of hydrotreating catalyst
namely Titanium, Molybdenium and Nickle.
Reaction Temperature=300-400C
Pressure=60-80 bar
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PRODUCTION OF GREEN DIESEL
1.Hydro processing (Hydro-deoxygenation)
. Oxygen must be removed from the feedstock to achieve liquid
fuel with a high thermal stability and combustion property
similar to petroleum fuels.. remove oxygen as water by adding hydrogen.
. Reaction Temperature=300-600C
Reaction Pressure=70bar
Catalyst=Ni,Mo/Al2O3
Triglycerides +H2 GreenDiesel+H2O
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PRODUCTION OF GREEN DIESEL
2.Decarboxylation Carboxyl group is removed from a molecule as CO2 by Hydrogen
and catalyst.
Triglycerides+H2
3CO2 +Green diesel
+ light HC (Propane).
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DecarboxylationAdvantages:
Required H2only to saturate olefins
Catalytic stability increases because water does not
form in the reaction.Hydro-DeoxygenationDisadvantage:
HDO uses H2not only to saturate olefins but also to
remove O2as H2O.
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ADVANTAGES OF GREEN DIESEL
OVER BIODIESEL
High heating value and high energy density.
Have high Cetane number 80-90 as compared to
biodiesel 50.
Has lower Nox emission compared to biodiesel.
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BIO-ETHERS
Produced from
1.Glycerol(by product in biodiesel production).
Bioether produce by reacting TBA
(Tertiary butyl alcohol) with Glycerol usingdistillation.
2.Syn Gas (Produced from Jatropha Seed Husk)
CO+2H2 CH3OH
2CH3OH (CH3)2O+H2ODimethyl Ether substitute for propane in LPG or
DME as an economical alternative to LPG.
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BIOETHER PRODUCTION
DME PRODUCTION
This is two step process.
1.Methanol Synthesis
Syngas passed through cu based catalyst at a
temperature of 250C produce methanol.CO+2H2 CH3OH
2.Methanol Dehydration
2CH3OH CH3-O-CH3+H2O
This reaction occur in the presence of
alumina based catalyst at 310C.
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SYNGAS
Produced from
1.Coal
2.Material that would be rejected as waste.
3.Jatropha Seed HuskJatropha seed contains 42% seed husks.
Husk contain 4% ash,71% volatile matter and
25% fixed carbon. Its calorific value is 16MJ/kg.
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SYNGAS
Processes:
1. Briquetting via combustion.
2. Gasification.
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1. BRIQUETTING PROCESS
Raw materials are compressed under high
pressure to form a round or square briquette that
can be used for heating purpose.
briquettes made by extrusion.
The extrusion production technology of briquettes
is the process of extrusion Jatropha husk under
high pressure when heated from 160 to 350C.
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2. GASIFICATION PROCESS
A set of chemical reactions that uses limited oxygen to
convert a carbon-containing Jatropha seed husk into
a synthetic gas, or syngas.
Syngas produced in downdraft gasifier by several
different process.
1. Dehydration
2. Pyrolysis
3. Combustion C+O2 CO2
4. Gasification
C+H2O H2+CO
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GASIFICATION PROCESS
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BIOGAS
Produced From
1.Cattle Dung
2.Bagasse
3.Jatropha seed cake(Press-Cake)
RM CH4Content %
Cattle Dung 60
Bagasse 56.9
JCL seed cake 67.5
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BIOGAS
Jatropha Press-cake is high in organic matter
and has good potential for biogas production.
Biogas production from JCL (Jatropha carcass
leen)press-cake was about 60% higher than cattle
dung.
Biogas generated from Jatropha oil cake has
better calorific value than cattle excreta because
it has more methane.
Produced by two process
1.Pyrolysis
2.Anaerobic Digestion
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BIOGAS PRODUCTION
Anaerobic Digestion of Jatropha seed
cakeAccomplished in four stages.
1.Hydrolysislarge polymers converted into simpler monomers
2.Acidogenic Fermentation
simple monomers are converted into volatile fatty acids.
3.Acetogenesis
volatile fatty acids are converted into acetic acid, carbon dioxide,
and hydrogen.
4.Methanogenesis.
Acetates, formaldehyde, hydrogen and carbon dioxide are converted
to methane and water.
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Thank You
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