Estimation And Optimization Of The Adiabatic Performance In Accelerating Rate Calorimetry

The accelerating rate calorimeter is an important instrument for thermal runaway research,and it provides an experimental basis for the development of chemical process safety assessment by simulating the thermal behavior of chemical adiabatic conditions.In view of the fact that the specific heat and heat dissipation of the sample in the reaction process are neglected in the thermal analysis kinetics based on accelerating rate calorimetry,which leads to errors or even distortions in the solution results,the adiabatic performance evaluation and optimization of the accelerating rate calorimeter are studied in this paper.Firstly,based on the accelerating rate calorimetry principle and thermal analysis kinetics theory,an adiabatic reaction model is established to quantify the quantitative relationship between the dynamic tracking effect of furnace body and the change of thermal inertia factor.According to the thermal equilibrium equation,an improved expression of thermal inertia factor is proposed,and an adiabatic performance evaluation device based on Joule thermal simulation of sample thermal behavior is built to realize the dynamic evaluation of thermal inertia factor.Besides,an improved accelerating rate calorimeter with dynamic thermal inertia correction characteristics is designed,and a method for solving the dynamic parameters of kinetic analysis considering dynamic thermal inertia factor is studied,which eliminates the dynamic calculation error caused by the traditional accelerating rate calorimeter considering thermal inertia factor as a constant.The validity of the method is verified respectively by simulation and experiment.Finally,when the sample has a large reaction rate,the dynamic characteristic compensation of temperature measurement and control system is studied,the adiabatic tracking algorithm is optimized,and the simulation and experimental verification are carried out.The results show that the optimization algorithm can effectively improve the dynamic response characteristics of the system,significantly improve the adiabatic performance of the sample,and make the dynamic solution more accurate.In conclusion,the research in this paper is of great significance to enrich the evaluation methods of adiabatic performance of accelerating rate calorimeter and improve the method of solving adiabatic reaction kinetics,and the promotion of improved calorimeter and kinetic analysis method can provide powerful tools for the effective development of chemical process safety assessment.