Environmental pollution control is the challenge area of heterogeneous catalysts to avoid the use of harmful materials in chemical synthesis. So ZrO₂-based solid acid catalysts were prepared and used in environmental applications like production of biodiesel. ZrO₂ loading on different supports (Al₂O₃, Fe₂O₃, TiO₂ and SiO₂) prepared by a hybrid sol-gel auto combustion methods. The structural, surface and acidity properties are studied. The catalytic activity was evaluated by production of biodiesel through conversion of stearic acid to ester. ZrO₂/ SiO₂ has the highest conversion rate because of a high surface area and a high number of Lewis acid sites. Under the optimal reaction conditions of alcohol/ acid molar ratio 120:1, mass ratio of catalyst to acid 0.1, reaction time 3 h and reaction temperature 120 °C, the conversion rate reached 48.6%. Moreover, the catalysts reused over at least five runs without significant loss of activity.

控制环境污染是非均相催化剂要避免在化学合成中使用有害物质的挑战领域。因此，制备了基于ZrO ₂的固体酸催化剂，并将其用于环境应用中，例如生产生物柴油。ZrO ₂负载在通过混合溶胶-凝胶自燃方法制备的不同载体（Al ₂ O ₃，Fe ₂ O ₃，TiO ₂和SiO ₂）上。研究了结构，表面和酸度性质。通过将硬脂酸转化成酯来生产生物柴油来评估催化活性。ZrO ₂ / SiO ₂由于具有高表面积和大量路易斯酸位，因此具有最高的转化率。在醇/酸摩尔比为120：1，催化剂与酸的质量比为0.1，反应时间为3 h，反应温度为120°C的最佳反应条件下，转化率达到了48.6％。此外，催化剂在至少五次运行中重复使用，而活性没有明显损失。