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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Application of kaolin-based catalysts in biodiesel production via transesterification of vegetable oils in excess methanol
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Application of kaolin-based catalysts in biodiesel production via transesterification of vegetable oils in excess methanol

机译：高岭土基催化剂在植物油与过量甲醇的酯交换反应中在生物柴油生产中的应用

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摘要

Biodiesel production from transesterification of vegetable oils in excess methanol was performed by using as-prepared catalyst from low-cost kaolin clay. This effective heterogeneous catalyst was successfully prepared from natural kaolin firstly by dehydroxylation at 800. °C for 10. h and, subsequently, by NaOH-activation hydrothermally at 90. °C for 24. h and calcined again at 500. °C for 6. h. The as-obtained catalytic material was characterized with instruments, including FT-IR, XRD, SEM, and porosimeter (BET/BJH analysis). The as-prepared catalyst was advantageous not only for its easy preparation, but also for its cost-efficiency and superior catalysis in transesterification of vegetable oils in excess methanol to produce fatty acid methyl esters (FAMEs). Conversion efficiencies of soybean and palm oils to biodiesel over the as-prepared catalysts reached 97.0. ±. 3.0% and 95.4. ±. 3.7%, respectively, under optimal conditions. Activation energies of transesterification reactions of soybean and palm oils in excess methanol using these catalysts are 14.09. kJ/mol and 48.87. kJ/mol, respectively.
机译：通过使用廉价的高岭土粘土制备的催化剂，由植物油在过量甲醇中的酯交换反应生产生物柴油。这种有效的多相催化剂是由天然高岭土成功制备的，首先是在800.°C下进行10个小时的脱羟基反应，然后在90.°C下进行24小时的水热NaOH活化反应，然后在500.°C下再次煅烧6次。 。 H。所获得的催化材料用包括FT-IR，XRD，SEM和孔隙率计（BET / BJH分析）在内的仪器进行表征。所制备的催化剂不仅有利于其容易制备，而且还因为其在植物油在过量甲醇中的酯交换反应以生产脂肪酸甲酯（FAME）中的成本效率和优异的催化作用。在制备的催化剂上，大豆油和棕榈油向生物柴油的转化效率达到97.0。 ±。 3.0％和95.4。 ±。在最佳条件下分别为3.7％。使用这些催化剂，大豆和棕榈油在过量甲醇中的酯交换反应的活化能为14.09。 kJ / mol和48.87。 kJ / mol。

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