Abstract
In the present study, the combined effect of alumina nanoparticles into the Calophyllum inophyllum biodiesel blend and exhaust gas recirculation on the combustion, performance, and emission characteristics of a diesel engine was investigated. The alumina (Al2O3) nanoparticles with the mass fraction of 40 ppm were dispersed into the C. inophyllum biodiesel blend (20% of C. inophyllum biodiesel + 80% of diesel (CIB20)) by the ultrasonication process. Further, the exhaust gas recirculation was adopted to control the oxides of nitrogen (NOx) emissions of a diesel engine. The experiments were conducted on a single cylinder diesel engine with the diesel, CIB20, 20% of C. inophyllum biodiesel + 80% of diesel + 40 ppm Al2O3 nanoparticles (CIB20ANP40), CIB20 + 20% exhaust gas recirculation (EGR), and CIB20ANP40 + 20% EGR fuel samples at different load conditions. The results reveal that brake thermal efficiency of CIB20ANP40 fuel increased by 5.04 and 7.71% compared to the CIB20 and CIB20ANP40 + 20% EGR fuels, respectively. The addition of alumina nanoparticles to the CIB20 fuel, CO, and hydrocarbon (HC) emissions were was reduced compared to the CIB20 fuel. The smoke opacity was decreased with the addition of alumina nanoparticles to the CIB20 fuel by 7.3% compared to the CIB20 fuel. The NOx emissions for the CIB20ANP40 + 20% EGR fuel was decreased by 36.84, 31.53, and 17.67% compared to the CIB20, CIB20ANP40, and CIB20 + 20% EGR fuel samples at full load condition.
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Abbreviations
- ASTM:
-
American Society for Testing and Materials
- CI:
-
Compression ignition
- DI:
-
Direct injection
- CA:
-
Crank angle
- bTDC:
-
Before top dead center
- Al2O3 :
-
Aluminum oxide
- CIB20:
-
20% of C. inophyllum biodiesel + 80% of diesel
- CIB20ANP40 :
-
20% of C. inophyllum biodiesel + 80% of diesel + 40 ppm Al2O3 nanoparticles
- CIB20 + 20% EGR:
-
20% of C. inophyllum biodiesel + 80% of diesel + 20% EGR
- CIB20ANP40 + 20% EGR:
-
20% of C. inophyllum biodiesel + 80% of diesel + 40 ppm Al2O3 nanoparticles + 20%EGR
- CTAB:
-
Cetyltrimethyl ammonium bromide
- SEM:
-
Scanning electron microscopy
- XRD:
-
X-ray diffractometer
- EDS:
-
Energy dispersive spectrum
- FTIR:
-
Fourier transform infrared
- ppm:
-
Parts per million
- EGR:
-
Exhaust gas recirculation
- BTE:
-
Brake thermal efficiency
- BSFC:
-
Brake-specific fuel consumption
- EGT:
-
Exhaust gas temperature
- CO:
-
Carbon monoxide
- HC:
-
Hydrocarbon
- NOx:
-
Oxides of nitrogen
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Acknowledgements
The authors acknowledge the Department of Metallurgical and Materials Engineering, IIIT, Basara, TS, India for providing the SEM, XRD, and EDS reports of Al2O3 nanoparticles.
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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
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Anchupogu, P., Rao, L.N. & Banavathu, B. Effect of alumina nano additives into biodiesel-diesel blends on the combustion performance and emission characteristics of a diesel engine with exhaust gas recirculation. Environ Sci Pollut Res 25, 23294–23306 (2018). https://doi.org/10.1007/s11356-018-2366-7
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DOI: https://doi.org/10.1007/s11356-018-2366-7