Abstract
An experimental investigation was carried out to study the performance, emissions and combustion characteristics of a compression ignition (CI) engine fuelled with waste chicken fat biodiesel with alumina nanoparticles as an additive. The disposal of waste chicken creates environmental pollution, hence it is decided to extract oil from the waste chicken fat and produce biodiesel through transesterification process. As the chicken fat contains 13.6 % free fatty acid (FFA), a pre-treatment process was carried out using Ferric sulphate as a catalyst in order to reduce the FFA content less than 1 % to prevent soap formation during the process. Potassium hydroxide was used as catalysts for the effective conversion of triglycerides of waste chicken fat into methyl ester. Various diesel–biodiesel–alumina blends were prepared by varying the biodiesel proportions of 20 and 40 % by volume and 25 and 50 ppm of alumina nanoparticles to study its operating characteristics on a computerized single cylinder, constant speed CI engine. Aluminium oxide (Al2O3) nanoparticles were used as fuel born catalyst in order to enhance the combustion characteristics and reduce the harmful emissions. The engine test results showed less improvement in brake thermal efficiency and significant reduction on the hydrocarbons and carbon monoxide emissions. However, higher nitrogen oxide emissions were recorded due to the increase in combustion temperature as the nanoparticles enhanced the surface area to volume ratio which improves the thermal conductivity of the fuel blend resulted in improved combustion. Smoke reduction of 52.8 % was observed in B40 fuel blend with 50 ppm alumina nanoparticles under full load conditions.
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Abbreviations
- Al2O3 :
-
Aluminium oxide
- B20Al25:
-
Diesel 80 % + Biodiesel 20 % + Alumina nanoparticles 25 ppm
- B20Al50:
-
Diesel 80 % + Biodiesel 20 % + Alumina nanoparticles 50 ppm
- B40Al25:
-
Diesel 60 % + Biodiesel 40 % + Alumina nanoparticles 25 ppm
- B40Al50:
-
Diesel 60 % + Biodiesel 40 % + Alumina nanoparticles 50 ppm
- bmep:
-
Brake mean effective pressure
- BSFC:
-
Brake specific fuel consumption
- BTE:
-
Brake thermal efficiency
- CI:
-
Compression ignition
- CNT:
-
Carbon nanotubes
- CO:
-
Carbon monoxide
- FFA:
-
Free fatty acid
- HC:
-
Hydrocarbon
- HRR:
-
Heat release rate
- ID:
-
Ignition delay
- NOx :
-
Nitrogen oxides
- PM:
-
Particulate matter
- ppm:
-
particles per million
- RoPR:
-
Rate of pressure raise
- TDC:
-
Top dead center
- WCF:
-
Waste chicken fat
- WCFME:
-
Waste chicken fat methyl ester
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Acknowledgments
The authors are grateful to Dr. Srinivasan Sundarrajan, Director, National Institute of Technology, Tiruchirapalli for granting permission to establish Advanced I.C. Engines Research Laboratory in the Mechanical Engineering Department with modern computerized experimental facilities to the international standards. The authors are thankful to Dr. R.B. Anand and Mr. Dominic for their continuous support and encouragement in conduction the experiments. Also special thanks are given to Mr. Palanisamy, Mr. Kaliyaperumal and Mr. Durairaj for their help rendered during experimentation.
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Gurusala, N.K., Selvan, V.A.M. Effects of alumina nanoparticles in waste chicken fat biodiesel on the operating characteristics of a compression ignition engine. Clean Techn Environ Policy 17, 681–692 (2015). https://doi.org/10.1007/s10098-014-0825-5
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DOI: https://doi.org/10.1007/s10098-014-0825-5