Jian Chen,Mengjing Zhu,Fuwei Xiang,Junfeng Li,Hongjun Yang,Zhipeng Mao,Ganggang Chang,Shaoping Li
(2-methyl-6-ethylphenyl)-1-methoxypropyl-2-imine (MEMI) is an important intermediate for the synthesis of commercial pesticide S-metolachlor. However, the research on heterogeneously catalytic kinetics of MEMI, and further the catalytic distillation simulation aiming at continuous operation, have never been reported. Herein, the catalytic kinetics for the synthesis of MEMI by HPW/Al-MCM-41 have been systematically investigated, and further fitted by using a pseudo-homogeneous kinetic model, based on which, the reaction equilibrium constant, activation energy, and rate constant are obtained. Furthermore, simulation of the continuous process of MEMI synthesis was carried out using the software Aspen Plus V10. Sensitivity analysis of operating parameters such as feed stage, distillation rate, number of reactive theoretical stages, and the best operating conditions were also obtained. An excellent product purity (>98.9%) of MEMI could be achieved when operated at the optimum conditions. Compared with the batch method, catalytic distillation provided continuous synthesis of MEMI, and the reaction was more thorough, achieving process integration and optimization. Our results provide substantial theoretical and empirical supports for the industrial synthesis of MEMI.
Although perovskite solar cells (PSCs) have achieved significant success, there are still some barriers to their commercialization , such as poor stability and unsatisfactory power conversion efficiency (PCE). Here, we report low-dimensionality engineering of perovskites using mercaptoethylammonium iodide (MEMI). Two-dimensional (2D) perovskite materials can simultaneously passivate the interface defects of the perovskite film and enhance carrier extraction. The PCE of the device increased from 20.85% for the control device to a resultant of 22.41% for the target device. Meanwhile, device stability was ameliorated after MEMI modification, and the stability of unencapsulated target devices decreased by 7.5% after aging in the dark air condition for 300 h. Finally, the notorious lead leakage was significantly suppressed. This work guides to create efficient and stable environmentally friendly PSCs through low-dimensional engineering.
危险品化学品经营许可证（带存储）