集束式对流微通道反应器的构建与二氧化锰材料制备

发布时间：2018-03-21 15:53

  本文选题：微反应器　切入点：微观混合　出处：《北京化工大学》2017年硕士论文　论文类型：学位论文

【摘要】：过程强化是提高化工生产效能的重点,微反应器因其优越的混合性能、简单的结构成为过程强化领域的热点。相较于传统反应器,微反应器不存在明显的“放大效应”且操作简单安全,可简单的通过单元结构复制集成的方式对微反应器进行放大,提高产能实现工业化应用。本文构建了一种新型的集束式对流微通道反应器(C-CFMCR),对其微观混合性能进行探究,并运用该反应器制备电容材料二氧化锰。本课题的主要研究内容及结论如下:(1)基于I-/IO3-反应体系,对单束式对流微通道反应器(S-CFMCR)的结构进行优化,得出微通道内径0.5 mm、开孔大小1.0 mm和微通道内径0.8 mm,开孔大小1.3 mm的两种规格的微通道反应器混合效果较优。以S-CFMCR为复制结构单元,进行集束放大构建C-CFMCR,对C-CFMCR体积流量、体积流量比、放大倍数等参数进行了实验研究,得出:随着体积流量的增大,微观混合性能先增强再减弱,存在一个较优操作区间;体积流量比为1时,反应器混合性能最佳;放大倍数对反应器的混合效果影响不大,不存在明显的放大效应。(2)将C-CFMCR应用于MnO2的制备,探究操作条件、反应器结构和后处理步骤对MnO2性能的影响,得出:控制操作条件,可以得到形貌与性能较好的MnO2;陈化时间为2h,220℃下对MnO2进行2 h煅烧,得到的样品的比电容为175 F·g-1,循环充放电500次损失约10%。
[Abstract]:Process strengthening is the key to improve the efficiency of chemical production. Because of its superior mixing performance, the simple structure of microreactor has become a hot spot in the field of process strengthening. There is no obvious "amplification effect" in the microreactor and the operation is simple and safe. The microreactor can be amplified simply by the way of unit structure replication and integration. In this paper, a new type of cluster convection microchannel reactor (CCFMCR-C) was constructed and its microscopic mixing performance was investigated. The main contents and conclusions of this study are as follows: 1) based on the I / R 3 reaction system, the structure of single beam convection microchannel reactor (SCFMCRs) was optimized. The results showed that the mixing effect of two kinds of microchannel reactors with 0.5 mm inner diameter, 1.0 mm hole size and 0.8 mm internal diameter of microchannel and 1.3 mm hole size was better. Using S-CFMCR as the replicating structure unit, the C-CFMCRs were constructed by cluster amplification, and the volume flow rate of C-CFMCR was calculated. The experimental results show that with the increase of volume flow rate, the microcosmic mixing energy increases first and then weakens, and there is a better operation interval, and the volume flow ratio is 1:00, and the reactor mixing performance is the best. The amplification factor has little effect on the mixing effect of the reactor, and there is no obvious amplification effect. (2) the C-CFMCR is applied to the preparation of MnO2, and the effects of operation conditions, reactor structure and post-treatment steps on the performance of MnO2 are explored. MNO _ 2 with good morphology and properties can be obtained, and the specific capacitance of the sample is 175F 路g ~ (-1), and the cyclic charge / discharge loss of 500 times is about 100.The sample is calcined for 2 hours at 2hu ~ (220 鈩，

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