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The effect of biodiesel production method on its combustion behavior in an agricultural tractor engine

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Abstract

In this study, biodiesel fuel was produced from waste cooking oil (WCO) using a heterogeneous catalyst under microwave (MB) and conventional (CB) heating, and fueled in an agricultural tractor engine to evaluate the engine performance as well as emissions. The biodiesels presented different fatty acid methyl ester (FAME) profiles where MB had lower unsaturated FAME chains. Beyond the transesterification reaction time, the energy consumed for MB biodiesel production diminished by around eight times compared to that required for CB production. The engine results confirmed the positive influence of blending net diesel fuel with biodiesel for enhancing the engine performance and reducing the emissions. More than 20% increment in the engine power and torque was detected at all engine loads (the engine speed was adjusted at 1500 rpm). The hydrocarbon (HC), carbon monoxide (CO), and smoke opacity (SO) indicated significant reductions compared to when net diesel fuel was used. According to statistical analysis, CB25 and MB25 fuels presented a suitable combination as fuel where MB25 provided better engine performance, lower HC and SO emissions, with CO emissions reaching the minimum amount by CB fuels.

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Data availability

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

ANOVA:

Analysis of variance

ASTM:

American Society for Testing and Materials

BSFC:

Brake specific fuel consumption

Bx:

Biodiesel blend level

CO:

Carbon monoxide

CO2 :

Carbon dioxide

IC:

Internal combustion

FAME:

Fatty acid methyl ester

FFA:

Free fatty acid

FID:

Flame ionization detector

GC:

Gas chromatography

HC:

Hydrocarbon

CB:

Biodiesel produced via conventional heating method

MB:

Biodiesel produced via microwave heating method

NOx:

Nitrogen oxides

rpm:

Rotation per minute

SO:

Smoke opacity

WCO:

Waste cooking oil

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Funding

The authors gratefully acknowledge the Esfarayen University of Technology for the financial support of the research (grant number: 93/11167).

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Contributions

Hamed Nayebzadeh: conceptualization, data curation, visualization, review and editing. Hassanain AbdulRahman Allami: methodology, investigation, data curation, writing. Shiva Motamedi: methodology, statistical analysis, writing the first draft of the manuscripte. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Hamed Nayebzadeh.

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The authors declare no competing interests.

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Responsible editor: Philippe Garrigues

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Allami, H.A., Nayebzadeh, H. & Motamedi, S. The effect of biodiesel production method on its combustion behavior in an agricultural tractor engine. Environ Sci Pollut Res 30, 5955–5972 (2023). https://doi.org/10.1007/s11356-022-22347-8

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  • DOI: https://doi.org/10.1007/s11356-022-22347-8

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