Characteristics Analysis of Temperature Rise Rate of Coal Oxidation at Low Temperature and Free Radicals Concentrations
Abstract：The self- developed adiabatic oxidation experimental system was used to simulate the adiabatic oxidation process of Yima coal, according to the research ,it was demonstrated that the development of oxidation process can be divided into several obvious stages,and kinetic parameter have changed two times, activation energy E and the p re - exponential factor A have not increased after 102~C ;The variation of free radicals concentrations were studied using an electron spin resonance （ESR）spectrograph in the changing temperature during oxidation. The results show that the variation of free radicals concentrations also can be divided into several obvious stages,as the temperature increase ,free radicals concentrations of Yima coal increase slowly firstly and then much rapidly , but decrease after 120℃. According to both results found that the trend of kinetic parameter correspond with the trend of variation of free radicals concentrations.
Keywords：adiabatic oxidationactivation energyfree radicals concentrations
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)