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| 超声波-微波辅助浓硫酸催化油酸制备生物柴油 |
| Ultrasound-microwave-assisted preparation of biodiesel from oleic acid using concentrated sulfuric acid as catalyst |
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| DOI： |
| 中文关键词: 酯化法 超声波-微波 生物柴油 响应面 |
| 英文关键词:esterification ultrasound-microwave biodiesel response surface |
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| 中文摘要: |
| 引入超声波-微波辅助技术，以植物油脂水解物油酸为原料，浓硫酸为催化剂，与甲醇酯化制备生物柴油。考察了微波功率、反应时间、催化剂用量、醇油摩尔比对油酸转化率的影响，并利用响应面实验对工艺条件进行了优化。结果表明：超声波-微波的引入强化了传质传热过程，能显著缩短反应时间；最佳工艺条件为超声波功率50 W、微波功率125 W、反应时间17 min、催化剂用量25%、醇油摩尔比19∶?1，在此条件下油酸转化率可达98%以上。 |
| 英文摘要: |
| With concentrated sulfuric acid as catalyst, biodiesel was prepared by esterification of oleic acid (vegetable oil hydrolysate) and methanol by ultrasound-microwave-assisted technology. The effects of microwave power, reaction time, catalyst dosage, molar ratio of methanol to oleic acid on conversion rate of oleic acid were investigated. The process conditions were optimized by response surface methodology. The results showed that the introduction of ultrasound and microwave enhanced the mass transfer and heat transfer process and shortened the reaction time. The optimal process conditions were obtained as follows: ultrasonic power 50 W, microwave power 125 W, reaction time 17 min, catalysts dosage 25% and molar ratio of methanol to oleic acid 19∶?1. Under these conditions, the conversion rate of oleic acid reached above 98%． |
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