Omranpour Sajad, Larimi Afsanehsadat
Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
Department of Chemical and Process Engineering, Niroo Research Institute, Tehran, Iran.
Sci Rep. 2024 May 2;14(1):10153. doi: 10.1038/s41598-024-60757-5.
In this study, modeling and simulation of biodiesel synthesis through transesterification of triglyceride (TG) over a heterogeneous catalyst in a packed bed membrane reactor (PBMR) was performed using a solid catalyst and compared with a fixed bed reactor (FBR). The kinetic data for the transesterification reaction of canola oil and methanol in the presence of solid tungstophosphoric acid catalyst was extracted from the published open literature. The effect of reaction temperature, feed flow rate, disproportionation of the reactants, and reactor length on the product performance was investigated. Two-dimensional and heterogeneous modeling was applied to PBMR and the resultant equations were solved by the Matlab software. Moreover, the velocity profile in the membrane reactor was obtained. The results showed the best conditions for this reaction are 180 °C, the molar ratio of methanol to oil equal 15:1, and the input flow rate of 0.5 mL/min. In this condition, a conversion of 99.94% for the TG can be achieved in the PBMR with a length of 86 cm while a length of 2.75 m is required to achieve this conversion of the FBR. Finally, the energy consumption for the production of 8000 ton/y biodiesel in a production plant using the PBMR and the FBR was obtained as is 1313.24 and 1352.44 kW, respectively.
在本研究中，使用固体催化剂在填充床膜反应器（PBMR）中通过甘油三酯（TG）的酯交换反应进行生物柴油合成的建模与模拟，并与固定床反应器（FBR）进行比较。从已发表的公开文献中提取了在固体钨磷酸催化剂存在下菜籽油与甲醇酯交换反应的动力学数据。研究了反应温度、进料流速、反应物的歧化以及反应器长度对产物性能的影响。对PBMR应用二维非均相建模，并通过Matlab软件求解所得方程。此外，获得了膜反应器中的速度分布。结果表明，该反应的最佳条件为180℃、甲醇与油的摩尔比为15:1、输入流速为0.5 mL/min。在此条件下，长度为86 cm的PBMR中TG的转化率可达99.94%，而FBR达到此转化率则需要2.75 m的长度。最后，得出在生产工厂中使用PBMR和FBR生产8000吨/年生物柴油的能耗分别为1313.24和1352.44千瓦。
