July 14, 2025 Thesis Open Access

Yordanos Tarko

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  <identifier identifierType="DOI">10.20372/nadre:8603</identifier>
  <creators>
    <creator>
      <creatorName>Yordanos Tarko</creatorName>
      <affiliation>Woldia University</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Experimental Investigation of Essential Oil Extraction Using Hydro-Distillation from Eucalyptus (Eucalyptus Globulus) Leaves for Liquid Biofuel Application</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2025</publicationYear>
  <subjects>
    <subject>Eucalyptus globulus leaves, Hydro-distillation, Liquid Biofuel, Central Composite Design, Characterization, optimization</subject>
  </subjects>
  <dates>
    <date dateType="Issued">2025-07-14</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Thesis</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://nadre.ethernet.edu.et/record/8603</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.20372/nadre:8602</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&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;</description>
  </descriptions>
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