3. Results and discussion
3.1. Characterization of the crude roselle oil
The crude roselle oil used in this study was clear, viscous, and
yellow in color, without having undergone any further refining
for use as a biodiesel feedstock. Its properties were determined
to ascertain suitability for biodiesel production and to determine
a suitable production process for this feedstock. The predominant
fatty acids in the oil and its various important properties are shown
in Table 1