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A Comprehensive Review on Rare Biodiesel Feedstock Availability, Fatty Acid Composition, Physical Properties, Production, Engine Performance and Emission

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Abstract

The world is now experiencing the first real global energy crisis, the effects of which will be felt for many years to come. Fossil fuels have accounted for more than 80% of the world’s energy requirements for decades. The cost of coal has reached record highs, while the price of oil reached at it’s peak in the middle of 2022 at well over 100 US dollars per barrel before declining. Rising energy costs of fossil fuels are driving a significant wealth shift from consumers to producers. The primary causes of the growing level of carbon dioxide in the atmosphere are fossil fuels. Stated Policy Scenario predicts a 1% annual growth in primary energy demand through 2030, which will be mostly satisfied by greater usage of renewable energy sources. Biodiesel is gaining popularity as a means of supplying energy since it is a renewable fuel, non-toxic, biodegradable, and locally available using recycled or agricultural materials with a lesser environmental effect. Biodiesel refers to a non-petroleum-based diesel fuel consisting of short-chain esters, made by using numerous resources, which can be used (alone or blended with conventional diesel) in an unmodified diesel engine. The greenhouse gas emission for biodiesel is 74% lesser as compared to diesel fuel. With the widespread implementation of blending rules, the usage of biofuels rises to 5.5 million barrels of oil equivalent per day (mboe/day) in 2030 from 2.2 mboe/day in 2022. This study explores the numerous rare biodiesel feedstock, production, fatty acid content, physical properties and their effect on diesel engine output behaviour. These resources contain a large amount of free fatty acids and triglycerides which are usually used in the preparation of biodiesel. Since biodiesel has a higher oxygen content and a lower energy content than diesel fuel, it often offers better brake thermal efficiency, brake specific fuel consumption, NOx emission, and decreased HC, CO and smoke emissions at some blending ratio. The exhaust gas recirculation assembly in the engine reduces the NOx emission. The incorporation of non-additive in biodiesel blend acts as a catalyst during the combustion process and improves engine combustion by increasing the surface area of combustion. Biodiesel is clean energy and can be a promising future energy source for diesel engines.

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Data Availability

The data used to support the findings of this study are included in the article.

Abbreviations

KAC:

Potassium hydroxide (KOH)-activated Ailanthus cake

CAC:

Calcined Ailanthus cake

CdS:

Cadmium sulphide

FMAE:

Fatty acid methyl ester

BSEC:

Brake specific energy consumption

BSFC:

Brake specific fuel consumption

DMC:

Dimethyl carbonate

RSM:

Response surface methodology

CCD:

Central composite design

VCR:

Variable compression ratio

BTE:

Brake thermal efficiency

EGT:

Exhaust gas temperature

EGR:

Exhaust gas recirculation

HRR:

Heat release rate

CR:

Compression ratio

UHC:

Unburned hydrocarbon

US:

United States

HC:

Hydrocarbon

CO:

Carbon monoxide

GO:

Graphene oxide

DI:

Direct injection

CI:

Compression ignition

IEA:

International Energy Agency

WCO:

Waste cooking oil

IP:

Injection pressure

IT:

Injection timing

bTDC:

Before top dead centre

B00:

100% Biodiesel

B10:

10% Biodiesel + 90% diesel

B15:

15% Biodiesel + 85% diesel

B20:

20% Biodiesel + 80% diesel

B30:

30% Biodiesel + 70% diesel

B40:

40% Biodiesel + 60% diesel

D100:

Neat diesel

BP:

Brake power

CuO:

Copper oxide

Al2O3 :

Aluminium oxide

ppm:

Parts per million

PV:

Photovoltaic

EU:

European Union

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Acknowledgements

The author would like to acknowledge Center for Alternative and Renewable Energy and Department of Mechanical Engineering, Rajkiya Engineering College, Azamgarh for the work.

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Correspondence to Brihaspati Singh.

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Singh, B., Srivastava, A.K. & Prakash, O. A Comprehensive Review on Rare Biodiesel Feedstock Availability, Fatty Acid Composition, Physical Properties, Production, Engine Performance and Emission. Process Integr Optim Sustain 7, 1081–1116 (2023). https://doi.org/10.1007/s41660-023-00343-w

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  • DOI: https://doi.org/10.1007/s41660-023-00343-w

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