Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
Chemosphere. 2023 May;322:138078. doi: 10.1016/j.chemosphere.2023.138078. Epub 2023 Feb 7.
Conventional homogeneous-based catalyzed transesterification for the production of biodiesel can be replaced with a membrane reactor that has an immobilized heterogeneous catalyst. Combining reaction with separation while utilizing membranes with a certain pore size might boost conversion process. this investigation to study the effectiveness of membrane reactor in combination with heterogeneous green nano catalysis of MnO. Techniques such as XRD, EDX, FTIR, SEM, and TGA were used to characterize the synthesized MnO nano catalyst. The highest conversion of around 94% Trachyspermum ammi oil was obtained by MnO. The optimum process variables for maximum conversion were catalyst loading of 0.26 (wt.%), 8:1 M ratio, 90 °C reaction temperature, and time 120 min. The green nano catalyst of MnO was reusable up to five cycles with minimum loss in conversion rate of about 75% in the fifth cycle. Nuclear magnetic resonance validated the synthesis of methyl esters. It was concluded that membrane reactor a promising technique to efficiently transesterify triglycerides into methyl esters and enable process intensification uses MnO as a catalyst.
传统的基于均相的酯交换法可用于生产生物柴油，但可以用具有固定化多相催化剂的膜反应器来代替。在利用具有一定孔径的膜进行反应和分离的同时，可以提高转化率。本研究旨在研究膜反应器与 MnO 多相绿色纳米催化相结合的效果。采用 XRD、EDX、FTIR、SEM 和 TGA 等技术对合成的 MnO 纳米催化剂进行了表征。MnO 对胡荽籽油的转化率最高可达 94%左右。在最大转化率下，最佳工艺参数为催化剂用量 0.26（wt.%）、8:1 M 摩尔比、90°C 反应温度和 120 min 反应时间。绿色纳米 MnO 催化剂在第五次循环中可重复使用 5 次，转化率最低损失约 75%。核磁共振验证了甲酯的合成。结论是，膜反应器是一种很有前途的技术，可有效地将甘油三酯转化为甲酯，并通过使用 MnO 作为催化剂实现过程强化。
