Dynamic parameters of low temperature oxidation of weakly viscous coal at different gas concentration conditions
WANG Fei
JING Changbao
YU Bo
LIU Hongliang
ZHANG Baodi
WANG Zhenping
Abstract：In order to study the characteristics of low-temperature oxidation of weakly viscous coal under different gas concentration conditions inside the mining area and the change law of kinetic parameters,this paper adopts the coal spontaneous combustion tem-perature programming experimental system to test and analyze the change law of gaseous products with temperature during the low-temperature oxidation of weakly viscous coal under different gas concentration conditions,and calculate the limit parameters and ac-tivation energy during the low-temperature oxidation of weakly viscous coal.The results show that:CO gas can be used as the main predictor gas for spontaneous combustion prevention and control of weakly viscous coal,and C2H4 gas and R2 can be used as auxili-ary indicators for predicting the degree of spontaneous combustion of weakly viscous coal;the maximum limit parameters of meth-ane samples with different gas concentration conditions are distributed in the temperature range of 60-85℃,which is similar to the critical temperature of spontaneous combustion of coal.With the methane volume fraction increasing from 0 to 4%,the apparent ac-tivation energy of weak sticky coal shows a gradual increasing trend,increasing by 35.061,18.426 and 25.837 kJ/mol,respectively.
Keywords：coal spontaneous combustiongas concentrationtemperature programminglow temperature oxidationactivation en-ergy
Publication Date：2023-12-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 64-72 )