Non-adiabatic reaction calorimetric technique

Details Non-adiabatic reaction calorimetric technique Non-adiabatic reaction calorimetric technique

1978-06-28

1979-09-04

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

System

23230PC, 422 51, G01K 1700

Patent

active

041663853

ABSTRACT:
A nonadiabatic calorimetric technique useful broadly for quantifying the reaction kinetics of thermally unstable solids is based on the distinguishing mode of establishing, under near steady state conditions, a thermal gradient across a reaction sample contained between monitored hot and cold surfaces, stepwise or rampwise increasing the temperature of the hot surface, and quantifying the maximum temperature that is withstood by the sample at the inception condition of a thermal runaway reaction. The critical hot surface temperature recorded by the experiment is a function of the cold surface condition, i.e., the applied thermal gradient. At least two critical hot surface temperatures, which are required for calculations, are generated by repeating the experiment under differing cold surface conditions. Solution of the steady-state differential equation describing the system, utilizing the experimental data, yields the general kinetics of the decomposition reaction of the tested solid. These thusly known kinetics allow prediction of the unsteady-state adiabatic or nonadiabatic thermal decomposition of the solid for any product geometry and initial condition.

REFERENCES:
patent: 3667294 (1972-06-01), Schoenlaub
patent: 4054056 (1977-10-01), Wegstedt
patent: 4088447 (1978-05-01), Walker

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