Abstract
The purpose of this study is to construct metal-organic framework (MOF) synthesis heating systems based on fuzzy method for monitoring and automatic control. In this study, the temperature sensing module for measurements sensed values that it through a wireless ZigBee chips and wired DAQ device for real-time data transmission. Because MOF synthesis, often due to different modes of heating or heating instability caused by its nucleation and crystal growth rate, is an important influence, leading to different crystallinity, the use of fuzzy theory to predict the temperature parameter and instant heating MOF synthesis parameters can be adjusted to improve the accuracy of the system. The research system to RS-232 interface module for infrared emission control packets issued and automated control of the furnace through the infrared receiver module. This study is based on a terminal interface window of Visual Basic programming and LabView graphical diagram for control system design. Finally, this research, through a number of experiments to validate the use of fuzzy system development methods and networks, can improve the accuracy of the reaction efficiency MOF sensing and control the heating system.
Highlights
This project is the monitoring and automatic control system for metal-organic framework (MOF) synthesis heating, which required a temperature controller for heating between 90∘C and 140∘C
The factors affecting the structure of MOF include the coordination of geometry environment that is favored by metal, synthesis temperature history, the ions to balance the number of charge, solvent system, the proportion of metal ion and organic ligands, and the pH value of reaction solution
The coordination ability of carboxyl is different between hot water condition under high temperature and warm condition in green house
Summary
This project is the monitoring and automatic control system for MOF synthesis heating, which required a temperature controller for heating between 90∘C and 140∘C. Metalorganic framework, MOF, so called metal-organic coordination polymers, MOCPs, is a porous framework formed by functional groups of organic ligands, such as terephthalic acid, and the metal ion with empty d orbit (such as zinc, nickel, and cobalt) through coordination bond and other interactions, such as hydrogen bond and van der Waals forces. This porous framework can maximize the surface area of material, like porous sponge. In a factory in Chunghwa County, a reactor was out of control, and a thermal explosion took place. Carboxyl is coordinated with multichelating, easy to form multidimensional structure; in room temperature, it is coordinated with single-chelating, easy to form a single-dimensional structure
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