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以活性炭(AC)负载酸性离子液体[Hmim-BS][HSO4]制备的[Hmim-BS][HSO4]/AC为催化剂,以大豆油和甲醇为原料,通过酯交换反应生成生物柴油。考察了离子液体负载量、催化剂用量、反应时间、反应温度以及醇油摩尔比等因素对生物柴油收率的影响。研究结果表明:在催化剂负载量为30%,催化剂用量为大豆油质量的7.5%,140℃下反应5h,生物柴油收率超过92%。重复使用4次后,生物柴油收率仍可达到83%左右,表现出良好的催化性能。
[Hmim-BS] [HSO4] / AC prepared from activated ionic liquid (AC) loaded acidic ionic liquid [Hmim-BS] [HSO4] was used as a catalyst to produce biodiesel through transesterification using soybean oil and methanol as raw materials. The effects of ionic liquid loading, catalyst dosage, reaction time, reaction temperature and molar ratio of alcohol to oil on the yield of biodiesel were investigated. The results showed that the yield of biodiesel was over 92% when the catalyst loading was 30%, the amount of catalyst was 7.5% of the mass of soybean oil, and the reaction was carried out at 140 ℃ for 5h. After repeated use for 4 times, the yield of biodiesel can still reach about 83%, showing good catalytic performance.