Paper Title
Oxidation Stability, Engine Performance and Emissions Investigations of Karanja, Neem and Jatropha Biodiesel and Blends
Keywords
- Biodiesel
- Oxidation Stability
- Poor Oxidation Stability
- Commercial Acceptance
- EU Standard
- EN14214
- Induction Period
- Rancimat Instrument
- Antioxidants
- Storage Stability
- Exothermic Oxidation
- Thermo Gravimetric Analysis
- TGA
- Differential Scanning Calorimetry
- DSC
- Methyl Esters
- Karanja Biodiesel
- Neem Biodiesel
- Jatropha Biodiesel
- Onset Temperature
- Pyrogalol
- Antioxidant Dosage
- Biodiesel-Diesel Blends
- Pongamia Pinnata
- Azadirachta Indica
- Jatropha Curcas
- Performance Testing
- Emission Testing
- IDI Diesel Engine
- Total Hydrocarbon Emissions
- Carbon Monoxide Emissions
- Brake Specific Fuel Consumption
- Thermal Efficiency
- Renewable Fuels
- Alternative Energy
- Fuel Stability
- Sustainable Combustion
- Biofuel Emissions
- Engine Performance
- Exhaust Emissions
- Biofuel Degradation
- Oxidative Stability Enhancement
Research Impact Tools
Publication Info
Volume: 4 | Issue: 1 | Pages: 76-83
Published On
January, 2011
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Abstract
ABSTRACT Poor oxidation stability is the central problem associated with the commercial acceptance of the biodiesel. The EU standard (EN14214) specifies a minimum value of 6 h for biodiesel induction period at 110°C, measured with Rancimat instrument. Most of the freshly prepared biodiesel generally have lower induction periods than prescribed by the standards. Anti-oxidants are therefore added to enhance the oxidation/ storage stability of biodiesel. Oxidation is an exothermic process, and the reaction heat evolved makes it possible to use thermo gravimetric analysis (TGA). In the present study, the oxidation stability of methyl esters derived from Karanja oil and Neem oil, stabilized with antioxidant pyrogalol (PY) was studied by DSC. Onset temperature of freshly prepared Karanja biodiesel (KOME) and Neem biodiesel (NOME) was observed to be 148 and 153°C respectively. The stability increases with increasing anti-oxidant dosage. A comparative analysis of oxidation stability of biodiesel/diesel blends was done on biodiesel derived from Karanja (Pongamia pinnata), Neem (Azadirachta indica) and Jatropha (Jatropha curcas) oil using Rancimat instrument. Jatropha biodiesel (JOME)/ diesel blends were observed to be most stable compared to KOME and NOME/ diesel blends. Further in this study, emissions and performance tests were conducted on an IDI diesel engine for diesel, B100, and biodiesel dosed with 1000 ppm of PY to experimentally evaluate adverse effects of antioxidants on biodiesel performance and emissions. With antioxidants dosed biodiesel, THC and CO were found to be slightly higher compared to diesel and B100. However the difference was not significant. Thermal efficiency and BSFC of anti-oxidants dosed biodiesel was comparable to diesel and B100.
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