采用新型固体酸Zr(SO4)2·4H2O替代传统的液体酸、碱催化剂，催化大豆油与甲醇的酯交换反应，制备生物柴油。考察了醇油摩尔比，催化剂用量，反应时间等因素对转化率的影响。采用气相色谱跟踪反应进程中各组分含量分布。优化出该反应最适宜的操作条件为：醇-油摩尔比6∶1，催化剂用量占原料油质量的3%，反应时间6h，反应温度65℃.在此条件下生物柴油的收率可达96.6%。制得的生物柴油与中国0#柴油(GB 252—1994优级品)的主要性能指标接近。
Abstract
In this work, biodiesel was obtained through transesterification of soy bean oil, using Zr(SO4)2·4H2O as a solid acid catalyst. Three principal factors affecting the yield of methyl esters (biodiesel): molar ratio of methanol to oil, amount of catalyst and reaction time were investigated. The methyl est ers composition was determined by gas chromatography (GC) at a certain interval, 2h. The optimized factors: 6:1 methanol/oil (molar ratio) with 3% Zr(SO4)2·4H2O (mass fraction) reacted at 65℃ for 6h, gave a maximum ester yie ld of 96.6%.
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参考文献
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