Biodiesel Production from Subcritical Methanol Transesterification of Soybean Oil with Sodium Silicate
Biodiesel Production from Subcritical Methanol Transesterification of Soybean Oil with Sodium Silicate
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DOI：
10.1021/ef100101m
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发表时间：
2010-04
期刊：
影响因子：
5.3
通讯作者：
Jianzhong Yin;Zhen Ma;Da-Peng Hu;Z. Xiu;Tonghua Wang
中科院分区：
文献类型：
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作者：
Jianzhong Yin;Zhen Ma;Da-Peng Hu;Z. Xiu;Tonghua Wang
超临界甲醇反应制备生物柴油是一种高效的非催化方法。由于高温高压，该技术的实际应用受到限制。为了改善操作条件，开发温和的方法已成为生物柴油生产的新趋势。本文以亚临界甲醇为原料，以少量硅酸钠（Na2SiO3）为催化剂，对大豆油进行酯交换反应制备生物柴油进行了研究。Na2SiO3作为催化剂可以改善大豆油在超临界甲醇中的酯交换反应。考察了反应温度、催化剂用量、反应速率、大豆油与甲醇的摩尔比等因素对酯交换反应中脂肪酸甲酯（FAME）收率的影响，并与无催化剂实验进行了比较。结果表明，在催化剂用量为0.5 wt %、反应温度为220℃、反应时间为30 min的条件下，FAME收率可达95.6%。
Biodiesel from supercritical methanol reaction is a high-efficiency method of noncatalysis. Due to high temperature and pressure, this technology has been limited to practical applications. To improve the operation conditions, developing a mild method has become a new trend for biodiesel production. In this paper, the transesterification of soybean oil in subcritical methanol was studied with a small amount of catalyst of sodium silicate (Na2SiO3) to obtain biodiesel. Na2SiO3 as a catalyst can improve the transesterification reaction of soybean oil in supercritical methanol. The variables affecting the fatty acid methyl ester (FAME) yield during the transesterification reaction, such as the reaction temperature, catalyst content, reaction rate, and the molar ratio of soybean oil to methanol, were investigated and compared with those of noncatalyst experiments. The test results show that a FAME yield of 95.6% was achieved when the reaction was performed with a catalyst content of 0.5 wt % at 220 °C for 30 min.