Investigating the cyclic breaking of butyl-, methyland ethyl-biodiesel from waste vegetable oil using ultraviolet-visible spectrophotometry
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Abstract
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The main advantage of biodiesel to fossil-diesel is attributed to the
ester functional group in its structure. Many researchers have affirmed that the
functional group assists the diesel engine to function at its peak. However, the efficiency
of the biodiesel to keep the mechanical piston-strokes in the diesel engine
is experimentally presumed low especially if the engine works for a long time. In
this research, it was proposed that the cyclic break down of the ester functional
group of biodiesel is a major disadvantage. Butanol, ethanol and methanol biodiesel
were produced in the laboratory using waste vegetable oil from restaurant.
The Ultraviolet-visible spectroscopy or spectrophotometer (UV–Vis) was used
to investigate the cyclic break down in the Butyl-, Methyl- and Ethyl- biodiesel.
The Ultraviolet-visible spectroscopy or spectrophotometer (UV–Vis) was used
to probe the various biodiesel samples with a start and stop wavelength of 500
and 900 nm respectively. The wavelength interval was 1 nm at a high scanning
speed. Between 500–550 and 800–850 nm, the Ethyl- and Butyl- biodiesel had an
absorbance
of 2.7 and 1.6 respectively with 3 peaks each. Methyl-biodiesel had
the highest absorbance of 1.7 at 600–650 nm with 1 peak. The computational
extrapolation of all outcomes affirms that cyclic breaking is highest in Butylbiodiesel.
The most resilient biodiesel type was the Ethyl-biodiesel. However,
it was recommended that cyclic breaking may be preserved by ratio-mixing of
biodiesel
with fossil-diesel.
Keywords
Q Science (General), QC Physics