| Summary: | 碩士 === 高苑科技大學 === 化工與生化工程研究所 === 98 === In this study, soybean oil and methanol as raw materials, sodium hydroxide as catalyst, the use of high power ultrasound to improve the mixing speed up the mixture of soybean oil and methanol, to accelerate the preparation of the conversion rate of biodiesel.
The results showed that ultrasound power range of 55 to 275 W, the conversion rate first increases and then decreases; raising the oil/methanol can enhance the conversion ratio; sodium hydroxide addition range of 0.1 to 3.0 wt% , adding sodium hydroxide amount of 0.5 wt% in the highest, not been addition of conversion rate than higher ; change in different temperature range of 20 to 70 oC, the reaction temperature exceeds 60 oC, the conversion rate would decrease; at different reaction time range of 0.1 to 3.0 hrs, the highest conversion rate in 1.0 hrs.In addition, the improvement of stirring rate range of 100 to 600 rpm , the stirring has no too greatly change, the conversion rate has remained above 90 %.
The study found that use of ultrasound to accelerate soybean oil and methanol production biodiesel optimization conditions are: the intensity of ultrasonic of 165 W, the ratio of 1︰6 oil/methanol, the amount of sodium hydroxide of 0.5 wt%, reaction temperature 60 oC, the reaction time of 1.0 hr and stirring rate of 200 rpm, the conversion rate was 97.5 %.
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