マイクロ化学プロセスの設計と操作

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Micro devices have large specific surface area. This feature can be effectively used to control the residence time and the temperature in the devices. In the manuscript, the feature of the design and operation problems of micro chemical plant is discussed. First, it is explained that the temperature and residence time can be controlled precisely in micro devices by using examples. Then, the importance of optimal shape design is stressed using a case study of exothermic reaction.In most cases, the flow rate of single channel is not enough for real production. The numbering-up is dominant method for micro plant to increase the flow rate. The feature of several numbering-up method is explained and the desirable numbering-up procedure is proposed. The blockage of the channels is a dominant abnormal condition for micro devices. Therefore, to achieve the stable long-term operation of micro chemical plants it is very important to detect the blockage of the channels as early as possible. It is not practical to install the sensors in all the parallel channels from the standpoint of measuring device cost. A distributer structure that can detect and diagnose a blocked channel has been proposed. In the proposed system, two flow sensors are enough for detecting the blocked channel even when the process consists of 4 to 8 parallel channels. Furthermore, a flow control system that ensures the steady state operation for each of the parallel devices during the replacement of the device in the blocked channel is proposed.
2011-05-01

マイクロ化学プロセスの設計と操作

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