Extension of Heat Exchange Calorimetry to Continuously Stirred Tank Reactor and the Calorimetric Evaluation

概要

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Heat exchange calorimetry is extended to continuously stirred tank reactor, CSTR, of flow type. Two glass vessels for sample and reference are fixed differentially in the precision water bath. Heat released in the sample vessel is exchanged freely with the ambient water. The temperature in each vessel is observed via a thermistor of small bead type constructed in Wheatstone bridge. The amplified output is introduced into analog computation circuit to calculate total heat effect. On the stopper of each vessel, solution inlet, heater element, thermistor and outlet for overflow are installed. In the present work, all examinations are carried out by water. As constancy of peristalsis pumps to send the solution was not so well for setting silicone tubing, the flow rate should be observed at every setting from time and mass measurements. Necessary evaluations for precision and reproducibility in the range from 3 to 73J are executed by electric heating and successful results were obtained for flow rate of 25, 16, 7 and 0g/min which corresponded to batch type calorimeter.
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