Abstract

KF-loaded CaO is known as a good solid base catalyst for biodiesel synthesis. KCaF₃ is generated when the KF/CaO catalyst is prepared, but its role in biodiesel synthesis is uncertain. Herein, we systematically investigated how KCaF₃ affected the transesterification reaction to yield biodiesel. We found that KCaF₃, by itself or as a component in KF/CaO, had no catalytic activity in biodiesel synthesis. Its real role was to improve the mechanical strength and structural robustness of the catalyst, thereby enhancing the catalytic activity of KF/CaO in transesterification reaction.

中文翻译：

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KCaF ₃结晶相对KF / CaO生物柴油合成催化剂活性的作用

摘要

负载KF的CaO被认为是生物柴油合成的良好固体基础催化剂。制备KF / CaO催化剂时会生成KCaF ₃，但不确定其在生物柴油合成中的作用。在本文中，我们系统地研究了KCaF ₃如何影响酯交换反应以产生生物柴油。我们发现，KCaF ₃本身或作为KF / CaO中的一种成分，在生物柴油合成中没有催化活性。它的真正作用是提高催化剂的机械强度和结构坚固性，从而增强KF / CaO在酯交换反应中的催化活性。