ฉันรักแปลภาษาA study was performed of the transesterification reaction of used frying oil by means of methanol,
using sodium hydroxide, potassium hydroxide, sodium methoxide, and potassium methoxide as
catalysts. The objective of the work was to characterize the methyl esters for use as biodiesels
in compression ignition motors. The operation variables used were methanol/oil molar ratio
(3:1-9:1), catalyst concentration (0.1-1.5 wt %), temperature (25-65 °C), and catalyst type.
Also, experiments in two stages of reaction, with separation of the glycerol in the first stage,
were carried out. The evolution of the process was followed by gas chromatography, determining
the concentration of the methyl esters at different reaction times. The biodiesel was characterized
by its density, viscosity, high heating value, cetane index, cloud and pour points, characteristics
of distillation, flash and combustion points, saponification value, and iodine value according to
ISO norms. The biodiesel with the best properties was obtained using a methanol/oil molar ratio
of 6:1, potassium hydroxide as catalyst (1%), and 65 °C temperature. This biodiesel had properties
very similar to those of no. 2 diesel. The two-stage transesterification was better than the onestage
process.
ฉันรักแปลภาษาA study was performed of the transesterification reaction of used frying oil by means of methanol,using sodium hydroxide, potassium hydroxide, sodium methoxide, and potassium methoxide ascatalysts. The objective of the work was to characterize the methyl esters for use as biodieselsin compression ignition motors. The operation variables used were methanol/oil molar ratio(3:1-9:1), catalyst concentration (0.1-1.5 wt %), temperature (25-65 °C), and catalyst type.Also, experiments in two stages of reaction, with separation of the glycerol in the first stage,were carried out. The evolution of the process was followed by gas chromatography, determiningthe concentration of the methyl esters at different reaction times. The biodiesel was characterizedby its density, viscosity, high heating value, cetane index, cloud and pour points, characteristicsof distillation, flash and combustion points, saponification value, and iodine value according toISO norms. The biodiesel with the best properties was obtained using a methanol/oil molar ratioof 6:1, potassium hydroxide as catalyst (1%), and 65 °C temperature. This biodiesel had propertiesvery similar to those of no. 2 diesel. The two-stage transesterification was better than the onestageprocess.
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