biodisel vehicle compatiability
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Biodiesel Vehicle compatibility
Veerakumar & M. A. Aravindh
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How does a diesel engine work?.
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Bio-Diesel as a performance fuel-
parameters considered
Antifoaming
Cetane No.- 45 to 70 (40 to 53 for natural
diesel)
Chemical structure and oxygen content
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Cold Flow Properties.
Viscosity Similar to mineral diesel( ASTM1.9 mm2/s at 40oC)
In Mineral Diesel it is a gradual process but inBiodiesel it is rapid due to the presence of similarcompounds.
Corrosion Lesser corrosion due to lesser sulphur content.
Density Higher density860-900 kg/m3 as compared to
mineral diesel800-860 kg/m3.
Conductivity Better than Mineral diesel hence reduces risk of static
induced spark and fire.
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Blending with Diesel & Additization
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Antifoaming Cetane No.
Cold Flow Properties
Conductivity
Density
Lubricity
Viscosity
Stability
Performance Additives
Additives
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Performance Additives
Corrosion Inhibitors
Prevent degradation and acid formation
Injector Deposits
Detergents are used50% Improvement
Water Separation
DemulsificationPrevent growth of microbes and
degradation due to absorbance of water
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Vehicle Compatibility and Emissions
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Diesel Vehicle Requirement Fuel system Effects
Swelling of Elastomers.
Reduces life of Fuel Filter due to absorbance of rust andwater by bio fuel.
Improved injection system.
Metals like bronze, brass etc have an catalytic effect on the
oxidation of biodiesel. Hence need to be avoided. Softens certain types of paints.
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Engine Performance using Biodiesel
Blends Gels at higher temp. than diesel and may cause
starting problem in subzero temperature.
Easy cleaning of cylinder head and piston.
Engine Oil contamination.
Increases lubricity
Insignificant change in maintenance cost.
Power produced depends on the type of bio
diesel, injection system, air fuel ratio etc.
Lesser injection timing can reduce the effect ofhigher cetane no.
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Emission
i f d b d bi di l
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Properties of rapeseed based biodiesel
that can cause vehicle problem
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Relevance for APEC vehicle
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APEC biodiesel Standard
Requiring diesel blends that contain biodiesel tocomply with Applicable diesel specification
Applicable bio-diesel specification
A new bio-diesel blend standard
Establishing a B100 standard that can Ensure successful use in the market as B100
The blend rate limits would be set.
Agreed quality standards to be blend with otherbiodiesel components.
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