2. What is Biodiesel?
It is a renewable and natural domestic
fuel extracted from animal fats or
vegetable oils, mostly soya
bean,rapeseed,corn, etc.
Biodiesel is a general name for methyl
esters from organic feedstock.
3. Biodiesel: What isn’t it ?
Non- esterified oils and fats
Non- esterified oils and fats blended
with petroleum-diesel
Partially esterified oils and fats
A blend of biodiesel and petroleum
diesel
4. Properties Of Biodiesel
A liquid of different colors, from golden to dark brown
variants
non-miscible with water with a high boiling point
higher flash point than that of petroleum diesel.
less denser then water with density of about ~ 0.88 g/cm.
higher cetane ratings.
Its calorific value is recorded to be about 37.27 MJ/L, which is
9% less than veritable petro diesel.
Sulphur free emissions.
Non-Toxic
5. Raw Materials
Rapeseed, the major source (>80%)
Sunflower oil (10%, Italy and Southern France)
Soybean oil (USA)
Palm oil (Malaysia)
Linseed, olive oils (Spain)
Cottonseed oil (Greece)
Jatropha (Asia)
6. Biodiesel Production Process
Biodiesel is produced from vegetable oils or animal fats and
an alcohol, through a Transesterification reaction.
Stages of Transesterification:
Treatment of Raw Material
Alcohol Catalyst Mixing
Chemical Reaction
Separation of Reaction Products
Purification of Reaction Products
7. Transesterification
Transesterification is a chemical reaction where
triglyceride is reacted with alcohol in the presence of
catalyst to produce alkyl esters.
Every 100 gallons of oil produces about 100 gallons of
biodiesel and 10 gallons of glycerol.
10. B100
B100 refers 100% biodiesel and 0%
diesel fuel.
Biodiesel is a very good solvent.
B100 freezes at much higher
temperature than conventional
diesel.
Biodiesel is not compatible with
certain hoses and gaskets.
Biodiesel is not compatible with
certain metals and plastics.
11. Blending Of Biodiesel
0 50 100
B2
B5
B10
B20
B100
Biodiesel Petroleum diesel
Biodiesel blend-blend of
biodiesel fuel with
petroleum-based diesel fuel ,
designated BXX, where XX is
the volume percent of
biodiesel.
12. Advantages of Biodiesel
Biodegradable, nontoxic, renewable
High flash point (300°F or higher)
Biodiesel reduces life-cycle greenhouse gas
emissions.
Lower emissions than petroleum diesel
Locally produced biodiesel supports the local
economy
Biodiesel improves engine operation and
easy to blend.
13. Environmental & Socio-
Economic Benefits
Reduction of waste
Extremely low emission of greenhouse gases compared to
fossil fuels
Growing variety of crops increases bio-diversity
Increase in trade balance (Indian perspective) due to lesser
dependence on foreign resources
Biodiesel can be used as supplement for home heating oil
14. Disadvantages of Biodiesel
Some biodiesel may begin to cloud and gel at temperatures as
high as 15°C.
Old fuel can become acidic and form sediments and varnish.
Rubber hoses of some old engines are attacked by biodiesel.
fuel efficiency is reduced by 1 to 2% if conventional diesel is
replaced by blended B20.
Biodiesel may be reactive with brass and copper.
15. Conclusion
It is significant to remember that as biodiesel may be considered as a
better alternate for petro diesel
Lesser use of non-renewable resources is lastly the only solution to the
problems like climatic changes, green house effect and other similar global
issues.
Appropriate use of technology greater efficiency of production and
conservation of resources are only the pathways for our society to extend
enjoyment of quality life.