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Review of physicochemical properties and spray characteristics of biodiesel

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Abstract

The United Nations Sustainable Development Goals by 2030 deal with seventeen goals for the planet’s sustainability. The present review focuses on affordable and clean energy through the effective combustion of fuels with minimal pollution. Effective fuel spray characteristics are essential for combustion among various parameters and fuel properties. The inherent nature of the fuel has a functional relationship with the injection and injectors’ conditions. Therefore, the study of fuels’ physicochemical properties is essential. This review deals with the spray characteristics of biodiesel. Biodiesels in its purest form and blended with diesel, di-n-butyl ether, dimethyl ether, diethyl ether, ethanol, and butanol are considered for the study. The physicochemical properties of biodiesels, injection conditions, and injector constraints are analyzed to understand the spray process. The atomization features such as spray tip penetration, Sauter mean diameter, spray cone angle, spray area, and spray volume are analyzed. The chemical properties of biodiesel are utilized to describe the spray’s transient behavior. In addition, supporting systems for spray diagnostics and models are also discussed. The highlighted significant spray challenges features and future research direction benefit the fuel and combustion community.

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Abbreviations

BD:

Biodiesel

BD100:

100% biodiesel

BD20:

20% biodiesel

BD70DBE30:

70% biodiesel and 30% dibutyl ether

BD80E20:

80% biodiesel and 20% ethanol

CN:

Cetane number

D100:

100% diesel

DBE:

Dibutyl ether

DEE:

Diethyl ether

DME:

Dimethyl ether

D o :

Orifice diameter

HC:

Hydrocarbon

HFO:

Heavy fuel oil

HV:

Heating value

HVL :

Lower heating value

L:

Orifice length

P:

Injection pressure

P a :

Ambient pressure

SCA:

Spray cone angle

SMD:

Sauter mean diameter

STP:

Spray tip penetration

T amb :

Ambient temperature

T f :

Fuel temperature

ρ amb :

Ambient density

ν :

Kinematic viscosity

ρ :

Density

ε:

Belongs to

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Acknowledgements

The authors are grateful to the SRM Institute of Science and Technology for contributing the required infrastructure to carry out this research work.

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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Ramalingam Senthil and Gunasekaran Arun Vijay. The first draft of the manuscript was written by Gunasekaran Arun Vijay and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Ramalingam Senthil.

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The authors declare no competing interests.

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Responsible Editor: Ta Yeong Wu

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Senthil, R., Vijay, G.A. Review of physicochemical properties and spray characteristics of biodiesel. Environ Sci Pollut Res 30, 66494–66513 (2023). https://doi.org/10.1007/s11356-023-27250-4

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  • DOI: https://doi.org/10.1007/s11356-023-27250-4

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