아날로그 회로를 채용한 고속 응답형 등온 열량계 개발 = Development of high speed type Isothermal Calorimeter using Analog Circuits

다국어 초록 (Multilingual Abstract)

High speed type isothermal calorimeter was designed and constructed using an analog circuit and a digital computer. The analog circuit measures the differential variations in temperature of the isothermal calorimeter in real time, and the computer receives the changes via an interface (IEEE-488). The information comming from the circuit is used to computer simulation which is analysing the heat of reaction, the heat capacity of the reaction mixture, and finally the change of compositions in the calorimeter. In order to trace and control the dynamic differential change of the physical and chemical properties in the calorimeter, an algorithm was developed which is necessary for the receiving input signal from the analog circuit, for the simulations of the reaction scheme ,and for the calorimeter actions, respectively.
After the estimation of the parameters affecting the calorimeter's action by employing water as an standard material for the calibration, the sample run employing both of 2-methyl furan and maleic anhydride in dioxane medium as a sample reaction was performed. The response data obtained from the calorimeter were compared with the simulated ones. Consequently the energy storage capacity of the mixture, the heat of reaction of the reaction, the equilibrium constant of the reaction, and the reaction rate could estimated within 0.5 % accuracy.