1. B. P. Pattanaik1*, M. K. Mohanty2, B. K. Nanda1, S. K. Nayak1, R. Panua3, P. K. Bose3
1School
of Mechanical Engineering, KIIT University, Bhubaneswar, Odisha
2College of Agriculture Engineering & Technology, OUAT, Bhubaneswar, Odisha
3Department of Mechanical Engineering, National Institute of Technology, Agartala, Tripura
Presented at the 4th International Conference on “Advances in Energy Research (ICAER-2013)”
10 – 12 December 2013 , IIT Bombay

2. OBJECTIVES
 Development of Karanja biodiesel from neat Karanja oil
by base catalyzed transesterification method
 Characterization of fuel properties of Karanja oil, Karanja
biodiesel and comparison with diesel
 Preparation of test fuels in the form of biodiesel blends
 Application of the test fuels to a single cylinder low
compression ratio diesel engine
 Estimation of various engine performance and emission
parameters for various test fuels and comparison of those
with that of diesel fuel
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3. INTRODUCTION
Why Alternative Energy?
 Limited stock of present fossil fuel reserves which will
last for few more years to come
 Increasing rate of air-pollution from automobiles using
petroleum based fuels
 Alarming increase in Green House Gases in the
atmosphere
 Reducing health standards due to excessive automobile
pollution
 Continuous hike in crude petroleum prices
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4. Causes for Promotion of Biofuels
 Contribution to the Energy Security Policy
 Environmental Concerns
 Foreign Exchange Savings
 Socio-Economic Issues Related to Rural Sector
 Greater Use of Renewable Energy
 Less Green House Gas Emissions
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5. Biodiesel as a Renewable Fuel
 Biodiesel is a chemically derived fuel comprised of
Mono-alkyl ester / Methyl ester of long chain fatty acids
of the triglycerides present in the straight vegetable oil
(SVO) / animal fat obtained during the transesterification
Process.
 It possesses almost similar fuel properties as mineral
diesel
 Completely bio-degradable and non-toxic
 Requires no engine modifications when used in engines
 Produces less green house gas emissions as compared to
diesel
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6. Karanja as a potential source for
biodiesel production
 Suitable climatic and soil conditions for Karanja
plantation in the Indian context
 Can grow in unused and infertile lands
 Higher oil content in the harvested seeds
 Completely non-edible vegetable oil
 Higher conversion yield potential for biodiesel production
 Low cost biodiesel production
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7. Photograph of Karanja Tree
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8. Harvested Karanja fruits and seeds
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9. Structure of Neat Vegetable Oil
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10. The Transesterification Reaction
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11. Transesterification Process
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12. EXPERIMENTAL
Biodiesel Production Methodology
 Heating & Grease Removal of Vegetable oil
 Acid Esterification of Vegetable oil
 Reagent Mixture Preparation (KOH+CH3OH)
 Base Catalyst Transesterification below 65 C
 Biodiesel Separation
 Methanol Recovery
 Glycerol Collection
 Biodiesel Collection, Washing & Purification
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13. Schematic diagram of a small biodiesel reactor
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14. Process Parameters used during Transesterification
Sl No.
Process parameters
Description
1
Process selected
Alkali catalyzed transesterification
2
Reaction temperature
55 – 60 oC
3
Sample oil used
1250 ml of neat Karanja oil
4
Methanol used
200 ml / kg of oil
5
Catalyst used (KOH)
0.5 – 1 % per kg of oil
6
Reaction time
1.5 hours
7
Settling time
8 – 10 hours
8
Water washing
8 – 24 hours
9
Stirring speed
550 – 700 rpm
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15. Biodiesel & Glycerol Separation
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16. Variation in viscosity of Karanja oil with temperature
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17. Comparison in density at various stages of biodiesel
production
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18. Comparison of viscosity of Karanja oil at various
stages
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19. Comparison in FFA composition of Karanja oil at
various stages
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20. Biodiesel Conversion Yield
0.92
Conversion Yield (%)
0.9
0.88
0.86
0.84
0.82
0.8
0.78
0
20
40
60
80
100
120
140
Reaction Time (Min.)
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21. Characterization of Fuel Properties
Properties
Karanja oil
Karanja biodiesel
Diesel
ASTM Methods
Density at 25oC (kg/m3)
910
880
860
D 1298
Kinematic Viscosity at
40oC (cSt.)
34.78
6.5
2.56
D 445
Acid value (mg KOH/g) 30.8
1.12
-
D 664
FFA (mg KOH/g)
15.4
0.56
-
D 664
Calorific value (MJ/kg) 36.4
40.2
44.2
D 240
Cetane number
32.22
56.64
47
D 613
Flash point (oC)
219
124
76
D 93
Fire point (oC)
228
146
78
D 93
Cloud point (oC)
9
5
-10
D 2500
Pour point (oC)
3
-2
-18
D 97
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22. Preparation of Biodiesel Blends (Test Fuels)
 B-20 (20% Biodiesel + 80% Petro Diesel)
 B-50 (50% Biodiesel + 50% Petro Diesel)
 B-100 (100% Biodiesel)
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23. Photograph of various test fuel samples
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24. Schematic Presentation of the Test Engine
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25. Photograph of the Test Engine Setup
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26. Test Engine Specification
Parameter
Description
Make/Model
Kirloskar oil engines India Ltd / AV-1
Engine type
Four-Stroke diesel engine
No. of cylinder
One
Bore × Stroke
80 × 110 mm2
Compression ratio
16.5:1
Injection pressure
220 bar
Injection nozzle opening
23obTDC
Rated power
6.25 kW
Rated speed
1500 rpm
Cooling type
Water cooled
Lubricating oil
SAE 20 W40
Dynamometer
Eddy current type (10kW, 43.5 A)
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27. RESULTS
Engine Performance Analysis
1. Brake Thermal Efficiency
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28. 2. Brake Specific Energy Consumption
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29. 3. Exhaust Gas Temperature
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30. Engine Emission Analysis
4. CO Emission
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31. 5. HC Emission
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32. 6. CO2 Emission
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33. 7. Smoke Emission
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34. 8. NOX Emission
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35. CONCLUSIONS
 The BTE was found to be increasing and the BSEC found to be
decreasing with increase in engine power output. The BTE was
highest for diesel and the BSEC was highest for Karanja
biodiesel at all loads.
 The CO and HC emission decrease initially at lower loads and
then increases when the load is increased above 50%. The CO
and HC emissions were also found to be higher for diesel.
 The CO2 emission in g/kWh decreases with increase in engine
power and the smoke emission increases with engine power
and load. Smoke emission was higher in case of B50 and B100.
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36. Continued….
 The EGT increases with increase in engine power and NOx
emission in g/kWh was found to be decreasing with increase in
engine power and load. Both EGT and NOx emission were
higher for Karanja biodiesel.
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37. FUTURE SCOPE
 Biodiesel being more viscous than diesel may require frequent
cleaning of engine components. Use of preheated biodiesel
blends in engines may be studied.
 Biodiesel if used for longer time in engines causes corrosive
effects. Studies on engine wear and corrosion due to the use of
biodiesel must be carried out.
 Biodiesel combustion causes higher combustion and exhaust
temperatures. Studies must be carried out for suitable engine
modifications resulting in low temperatute biodiesel
combustion.
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38. Continued….
 Higher NOx emission due to biodiesel combustion is a great
matter of environmental concern. Investigation must be
undertaken for reduction of the same using newer methods like
exhaust gas recirculation.
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39. ACKNOWLEDGEMENT
The authors are extremely thankful to the Department of
Mechanical Engineering, Jadavpur University, Kolkata
and the College of Agriculture Engineering & Technology,
OUAT, Bhubaneswar, Odisha for providing laboratory
facilities for conduct of the experiments.
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40. REFERENCES
1. Kerschbaum, S, Rinke, G: Measurement of the temperature dependent viscosity of biodiesel fuels. Fuel 83, 287–91(2004)
2. Stavarache, C, Vinatoru, M, Nishimura, R, Maed, Y: Fatty acids methyl esters from vegetable oil by means of ultrasonic
energy. Ultrason Sonochem 12, 367–72(2005)
3. Wang YD, AZ-Shemmeri T, Eames P, McMullan J, Hewitt N, Huang Y: An experimental investigation of the performance
and gaseous exhaust emission of a diesel engine using blends of a vegetable oil. Appl Therm Eng 26, 1684–91 (2006)
4. Sundarapandian S, Devaradjane G. Experimental investigation of the performance on vegetable oil operated CI engine.
19th National Conference on I.C. engine and combustion, Annamalai University, Chidambaram, December 21–23, 87–94
(2005).
5. Barnwal BK, Sharma MP. Prospects of bio-diesel production from vegetable oils in India. Renew Sust Energy Rev 9,
363–78 (2005)
6. Goff, MJ, Bauer, NS, Lopes, S, Sutterlin, WR, Suppes, GJ: Acid-catalyzed alcoholysis of soybean oil. J Am Oil Chem
Soc 200481, 415–20
7. Lotero, E, Goodwin, JG, Bruce, DA, Suwannakarn, K, Liu, Y, Lopez, DE: The catalysis of bio-diesel synthesis. Catalysis
19, 41–83 (2006)
8. Dmytryshyn, SL, Dalai AK, Chaudhari, ST, Mishra, HK, Reaney, MJ: Synthesis and characterization of vegetable oil
derived esters: evaluation for their diesel additive properties. Bioresour Technol 92, 55–64 (2004)
9. Ramadhas, AS, Jayaraj, S, Muraleedharan, C: Biodiesel production from high FFA rubber seed oil. Fuel 84, 335-340
(2005)
10. Misra, RD, Murthy, MS. Performance, emission and combustion evaluation of soapnut oil- diesel blends in a
compression ignition engine. Fuel 90, 2514-2518 (2011)
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