Investigating the cyclic breaking of butyl-, methylandudethyl-biodiesel from waste vegetable oil usingudultraviolet-visible spectrophotometry

摘要

The main advantage of biodiesel to fossil-diesel is attributed to theudester functional group in its structure. Many researchers have affirmed that theudfunctional group assists the diesel engine to function at its peak. However, the efficiencyudof the biodiesel to keep the mechanical piston-strokes in the diesel engineudis experimentally presumed low especially if the engine works for a long time. Inudthis research, it was proposed that the cyclic break down of the ester functionaludgroup of biodiesel is a major disadvantage. Butanol, ethanol and methanol biodieseludwere produced in the laboratory using waste vegetable oil from restaurant.udThe Ultraviolet-visible spectroscopy or spectrophotometer (UV–Vis) was usedudto investigate the cyclic break down in the Butyl-, Methyl- and Ethyl- biodiesel.udThe Ultraviolet-visible spectroscopy or spectrophotometer (UV–Vis) was usedudto probe the various biodiesel samples with a start and stop wavelength of 500udand 900 nm respectively. The wavelength interval was 1 nm at a high scanningudspeed. Between 500–550 and 800–850 nm, the Ethyl- and Butyl- biodiesel had anudabsorbanceudof 2.7 and 1.6 respectively with 3 peaks each. Methyl-biodiesel hadudthe highest absorbance of 1.7 at 600–650 nm with 1 peak. The computationaludextrapolation of all outcomes affirms that cyclic breaking is highest in Butylbiodiesel.udThe most resilient biodiesel type was the Ethyl-biodiesel. However,udit was recommended that cyclic breaking may be preserved by ratio-mixing ofudbiodieseludwith fossil-diesel.