In this study, the microwave-assisted solution combustion method was utilized for the fabrication of Ca₁₂Al₁₄O₃₃ as support and the amount of urea was assessed as an important parameter during synthesis of the sample. Synthesized Ca₁₂Al₁₄O₃₃ with different fuel amounts was impregnated by KOH and used in the biodiesel production process with canola oil under microwave irradiation. The results presented that the crystallinity, crystalline size, specific surface area, and elemental composition of the final nanocatalysts are affected by the fuel amount. Moreover, during impregnation of potassium components, the structure of support was interestingly transformed from CaAl₂O₄ to Ca₁₂Al₁₄O₃₃ structure due to the incorporation of potassium in an alumina lattice and more diffusion of calcium cations into a support lattice. On the other hand, when the amount of fuel passed the optimum amount (2 times the stoichiometric amount), the crystallinity was reduced due to the formation of high amounts of smoke during combustion and prevention of the entry of air (oxygen) into the system. The results of the microwave-enhanced transesterification reaction confirmed the results of the analyses that the conversion of 94.5% was obtained using an optimum sample at 450 W, 12 molar ratios of methanol/oil, 4 wt.% catalyst, and 60 min reaction time. According to the stability of the optimum sample [at least three times (>75%)], along with its unique mesoporous structure, uniform dispersion of potassium components, and high basicity sites, it can be considered as a comparable solid base nanocatalyst for biodiesel production.

在这项研究中，微波辅助溶液燃烧法被用于制造Ca ₁₂ Al ₁₄ O ₃₃作为载体，尿素的量被认为是样品合成过程中的重要参数。KOH浸渍了不同燃料量的合成Ca ₁₂ Al ₁₄ O ₃₃，并在菜籽油的微波辐射下用于生物柴油的生产过程。结果表明，最终纳米催化剂的结晶度，晶体尺寸，比表面积和元素组成受燃料量的影响。此外，在钾成分的浸渍过程中，有趣的是，载体结构从CaAl ₂转变了O ₄至Ca ₁₂ Al ₁₄ O ₃₃由于钾在氧化铝晶格中的结合以及钙阳离子向支撑晶格中的更多扩散而导致的结构。另一方面，当燃料量超过最佳量（化学计量的2倍）时，由于燃烧过程中形成大量烟气并防止空气（氧气）进入系统，结晶度降低。 。微波增强的酯交换反应的结果证实了分析结果，即使用最佳样品在450 W，12摩尔比的甲醇/油，4 wt％的催化剂和60分钟的反应时间下，转化率为94.5％。 。根据最佳样品的稳定性[至少三倍（> 75％）]，以及其独特的介孔结构，钾成分的均匀分散和高碱度位点，