Simulation of competitive adsorption of CO2/O2 in bituminous coals with different water contents
ZHOU Shengqi
ZHANG Yazhou
TANG Xiaochen
CHENG Genyin
CAI Chuncheng
Abstract：In order to study the competitive adsorption characteristics of CO2/O2 gas mixture in bituminous coals with different water contents,molecular models of bituminous coals with water contents of 1.42%,3.48%,and 5.45%were established,and the adsorption simulation study of coal on CO2/O2 gas mixture was carried out under different temperature and pressure conditions.The results showed that the adsorption capac-ity of CO2 in coals with different water contents was better than that of O2,and the increase in water content in coal inhibited the adsorption of CO2 and O2 gases,and the inhibition of CO2 was stronger.The interaction en-ergy of the whole system is proportional to the proportion of CO2 and inversely proportional to the moisture con-tent of coal.It indicates that when CO2 is injected into the coal seam,the higher the water content,the more un-favorable the adsorption of the gas by the coal,and the low-pressure and low-temperature state are conducive to the enhancement of the effect of preventing spontaneous combustion of coal.
Keywords：CO2/O2 gas mixturecompetitive adsorptionmoisture contentinteraction energy
Publication Date：2024-06-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 10-15 )