July 14, 2025 Thesis Open Access

Yordanos Tarko

DCAT Export

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        <foaf:name>Yordanos Tarko</foaf:name>
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            <foaf:name>Woldia University</foaf:name>
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    <dct:title>Experimental Investigation of Essential Oil Extraction Using Hydro-Distillation from Eucalyptus (Eucalyptus Globulus) Leaves for Liquid Biofuel Application</dct:title>
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    <dcat:keyword>Eucalyptus globulus leaves, Hydro-distillation, Liquid Biofuel, Central Composite Design, Characterization, optimization</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2025-07-14</dct:issued>
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    <dct:description>&lt;p&gt;Liquid biofuels are a type of renewable energy that can be used for electricity generation and heating applications. Eucalyptus globulus leaves, a lignocellulosic biomass, contain a significant amount of cellulose suitable for biofuel&lt;/p&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;p&gt;production. This study focused on optimising liquid biofuel production from&lt;/p&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt; &lt;p&gt;Eucalyptus globulus leaves using hydro-distillation. Key steps included raw material collection, proximate analysis, and biofuel extraction. The optimisation process examined the effects of temperature, particle size, and extraction time, applying a Central Composite Design within the RSM framework. The final biofuel was then characterised to assess its quality. A proximate analysis of Eucalyptus globulus leaves was conducted and revealed the following composition: moisture content (9.47%), volatile matter (76.50%), ash content (1.05%), and fixed carbon (12.98%). The experimental result indicated a maximum liquid biofuel yield of 3.40% (ml/g) at 100&amp;deg;C, 5 mm, and 3 hours. Under the optimum value predicted using the Central Composite Design model, the optimum yield of 3.32 % (ml/g) was achieved at 104.71&amp;deg;C, 4.45 mm, and 3.71 hours, and the validation value at the optimum parameter was 3.10 % (ml/g). The produced liquid biofuel exhibited desirable physicochemical and fuel properties, including a pale yellow colour, density of 0.77&amp;ndash; 0.90 g/mL, kinematic viscosity of 1.84&amp;ndash;2.35 mm&amp;sup2;/s, higher heating value of 37.54 MJ/kg, mass yield of 2.56%, energy density ratio of 1.82, energy yield of 46.60, acid value of 1.24&amp;ndash;1.82 mg KOH/g, flash point of 132 &amp;deg;C, and boiling point of 217.80 &amp;deg;C. FTIR analysis revealed key functional groups, including O&amp;ndash;H, C&amp;ndash;H, C=O, C=C, and C&amp;ndash;O. The findings suggest that hydro-distilled biofuel from EGL is a viable alternative energy source and could contribute significantly to addressing fuel shortages in rural areas.&lt;/p&gt;</dct:description>
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