In the present work, wild olive (Olea oleaster) plant oil was chosen as a hopeful feedstock for efficient biodiesel production. Mixed oxides of aluminium and chromium were modified with different amounts (10−40 wt.%) of 12-tungstophosphonic acid (TPA), used for biodiesel production from low cost local wild olive oil (WOO). Moreover, the physicochemical characteristics of the synthesized catalysts were elaborated with different analytical techniques such as XRD, SEM, EDX, BET. The biodiesel reaction was carried out in a single step via trans-esterification reaction using TPA impregnated Cr–Al mixed oxide catalyst. The maximum 93% biodiesel yield was obtained under the optimized conditions: oil/methanol molar ratio 1:21, reaction temperature 80 °C, catalyst dosage 4 wt% and reaction times 5 hrs with stirring speed of 600 rpm. Interestingly, the reusability experiments showed that the synthesized catalyst sustained remarkable stability and reusability up to 5 runs in the biodiesel production from wild olive oil. Furthermore, the synthesized biodiesel completely complied with international standards.

在本作品中，野橄榄（Olea oleaster) 植物油被选为高效生物柴油生产的有希望的原料。用不同量（10-40 wt.%）的 12-钨膦酸 (TPA) 改性铝和铬的混合氧化物，用于从低成本的当地野生橄榄油 (WOO) 生产生物柴油。此外，采用XRD、SEM、EDX、BET等不同的分析技术详细阐述了合成催化剂的物理化学特性。生物柴油反应通过使用 TPA 浸渍的 Cr-Al 混合氧化物催化剂的酯交换反应一步进行。在优化条件下获得最大93%的生物柴油收率：油/甲醇摩尔比1:21，反应温度80°C，催化剂用量4 wt%，反应时间5小时，搅拌速度600 rpm。有趣的是，可重复使用性实验表明，合成的催化剂在从野生橄榄油生产生物柴油中可保持显着的稳定性和可重复使用性高达 5 次。此外，合成的生物柴油完全符合国际标准。