Abstract
Biodiesel is an alternative energy sources to petroleum and its quantity is continuously decreasing due to an increase in demand, and produced through a chemical process called transesterification, which refers to a synthesizing the extracted oil, catalyst with methanol to produce biodiesel and a byproduct (glycerin). The production of biodiesel is carried out from non-edible oil extracted from Rumex Crispus leaves and root oils and optimizing the effects of independent process variables. For the optimization study, a Response Surface Methodology centered on Central Composite Design was used to optimize the independent process variables such as methanol/oil molar ratio, reaction time, reaction temperature, and catalyst concentration. A quadratic model was used to predict the performance of biodiesel yield. The optimal conditions were obtained at a molar ratio of methanol to oil of 8:1, a reaction time of 3 h, reaction temperature of 65 ℃, and catalyst concentration of 1.5 wt%. Under these conditions the predicted and experimental biodiesel yields were 93.72% and 94.18% respectively. The R2 value of the model was 0.9855, indicating the accuracy of the model. The properties of produced biodiesel from Rumex Crispus leave and root oil meets the requirements of American Society of Testing Material and European standard for biodiesel, and characterized by Gas Chromatography-Mass Spectroscopy and Fourier transform infrared analysis. The study investigated the potential of Rumex Crispus leaves and roots oil to biodiesel, using a heterogeneous catalysis system to bypass current demand issues.
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Availability of Data and Material
The availability of data, i.e. experimental design, data analysis (RSM), FTIR, Gas chromatography-mass spectrometry (GC–MS) used to support the results of this study are incorporated in the article.
Abbreviations
- ANOVA:
-
Analysis of variance
- CaO:
-
Calcium oxide
- CCD:
-
Central composite design
- FTIR:
-
Fourier transforms infrared
- GC–MS:
-
Gas chromatographs mass spectroscopy
- FAC:
-
Fatty acid
- RSM:
-
Response surface methodology centered
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All the authors: TAB wrote the main parts of the manuscript, YMB, MSB, KBH DAA and DGG have made a substantial contribution in conceptualization, data curation, formal analysis, methodology, designed the study and procedure, interpretation of the data, conducting lab testing, visualization, validation, analysis of FT-IR spectroscopy, and GC–MS analysis. All authors read and approved the final manuscript.
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Bullo, T.A., Bayisa, Y.M., Hundie, K.B. et al. Optimization, Characterization and Production of Biodiesel from Rumex Crispus Leaves and Roots Oil Using Central Composite Design (CCD). Chemistry Africa 7, 749–761 (2024). https://doi.org/10.1007/s42250-023-00784-3
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DOI: https://doi.org/10.1007/s42250-023-00784-3