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Effect of Pongamia pinnata leaves extracted natural antioxidant doped in biodiesel–diesel blend run low heat rejection engine

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Abstract

A thermal barrier-coated (TBC) piston-fitted engine is used to form a low heat rejection (LHR) mode, which helps in the enhancement of thermal efficiency by retaining heat energy. Research reports indicate that generally LHR diesel engines run on Jatropha biodiesel and its diesel blends show improved performance and higher oxides of nitrogen (NOx) in comparison with unmodified engines. This work is aimed at reducing nitric oxide (NO) emission in the LHR by using a natural antioxidant to JME20 (20% JME + 80% diesel). For this purpose, a natural antioxidant is extracted from the Pongamia pinnata leaves (PL). The antioxidant is characterized to ensure its antioxidant ability and doped to JME20 in different concentrations, including 500, 1000, 1500, and 2000 ppm. The cylinder pressure is reduced by about 5.9% and the heat release rate by 6.9%, for JME20 at a concentration of 2000 ppm in the LHR engine. The delay period and combustion duration are shortened by 23.6% and 7.3%, respectively, at maximum load for JME20 PLA4 in the LHR engine. The brake-specific fuel consumption (BSFC) of the tested fuel is improved by 21.1% at full load for JME20 PLA3. The engine emissions are reduced by 17.5% and 16.3% for unburnt hydrocarbon (HC) and smoke, respectively, at maximum load for JME20 PLA4, in the LHR engine. The nitric oxide (NO) emission is decreased by 16% for JME20 with 2000 ppm at a higher load in the coated engine.

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Abbreviations

BTE:

Brake thermal efficiency

BSFC:

Brake-specific fuel consumption

CO:

Carbon monoxide

CeO2 :

Cerium oxide

EDS:

Energy-dispersive spectroscopy

EGT:

Exhaust gas temperature

FAME:

Fatty acid methyl ester

FFA:

Free fatty acid

FTIR:

Fourier transform infrared spectroscopy

HC:

Hydrocarbon

HRR:

Heat release rate

JME:

Jatropha methyl ester

JME20:

20% JME + 80% diesel

LHR:

Low heat rejection

NA:

Natural antioxidant

NO:

Nitric oxide

NOx :

Oxides of nitrogen

PLA:

Pongamia pinnata leaves antioxidant

PLP:

Pongamia pinnata leaves powder

PPM:

Parts per million

P max :

Maximum cylinder pressure

SEM:

Scanning electron microscope

TBC:

Thermal barrier coating

XRD:

X-ray powder diffraction

YSZ:

Yttria stabilized zirconia

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There is no funding received for this research work.

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Correspondence to K. K. Pandey.

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The authors hereby declare that no conflicts of interest for this paper submission.

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Editorial responsibility: Chongqing Wang.

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Pandey, K.K., Murugan, S. Effect of Pongamia pinnata leaves extracted natural antioxidant doped in biodiesel–diesel blend run low heat rejection engine. Int. J. Environ. Sci. Technol. 20, 13159–13178 (2023). https://doi.org/10.1007/s13762-023-04777-0

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  • DOI: https://doi.org/10.1007/s13762-023-04777-0

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