Acid-Functionalized Magnetic Nanoparticle as Heterogeneous Catalysts for Biodiesel Synthesis
Acid-Functionalized Magnetic Nanoparticle as Heterogeneous Catalysts for Biodiesel Synthesis
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DOI：
10.1021/acs.jpcc.5b08743
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发表时间：
2015-11
影响因子：
3.7
通讯作者：
Hongwang Wang;J. Covarrubias;Heidy Prock;Xiaorong Wu;Donghai Wang;S. Bossmann
中科院分区：
文献类型：
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作者：
Hongwang Wang;J. Covarrubias;Heidy Prock;Xiaorong Wu;Donghai Wang;S. Bossmann
我们合成了氨基磺酸和磺酸功能化的二氧化硅包覆的结晶Fe/Fe 3 O 4核/壳磁性纳米粒子（MNP），表现出优异的稳定性。以油酸酯化反应和三油酸甘油酯酯交换反应为模型反应，研究了它们的催化活性。两种酸功能化的MNP在油酸酯化反应中表现出优异的催化活性。然而，氨基磺酸官能化的MNP在三油酸甘油酯的酯交换反应中表现出更好的反应性。两种酸官能化的MNP都可以通过磁沉淀回收。氨基磺酸官能化的MNP在整个5个连续反应运行中保持高反应性（>95%转化率），表明它们从含有高水平游离脂肪酸的低级原料（例如废食用油）生产生物柴油的潜力。
We have synthesized sulfamic acid and sulfonic acid functionalized silica-coated crystalline Fe/Fe3O4 core/shell magnetic nanoparticles (MNPs), which exhibited excellent stability. We have studied their catalytic activities with respect to the esterification of oleic acid and the transesterification of glyceryl trioleate as model reactions for biodiesel production. Both acid-functionalized MNPs demonstrated excellent catalytic activities in the reaction of esterification of oleic acid. However, the sulfamic acid functionalized MNPs showed better reactivity in the reaction of transesterification of glyceryl trioleate. Both acid-functionalized MNPs can be recovered by magneto-precipitation. The sulfamic acid functionalized MNPs retained high reactivity (>95% conversion) throughout 5 continuous runs of reactions, indicating their potential for biodiesel production from low grade feedstock, such as waste cooking oil, containing a high level of free fatty acids.