Effect of Ammonium Salt on the Adsorption Behavior and Surface Characteristics of Sub-Bituminous Coal and Silica

Li, Yonggai; Nie, Qingmin; Chen, Jianzhong; Li, Jiawei

doi:10.1021/acsomega.9b00466

Cited by 2 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liu et al 18 proposed a technical solution for cooling and injecting nitrogen to prevent spontaneous combustion of coal in goaf and developed corresponding deep cooling equipment systems. Li et al 19 improved the existing gas injection equation using CO 2 dissipation theory, providing new ideas for CO 2 prevention and fire extinguishing work in goaf. Through practice, 20 it has been proven that liquid CO 2 has a significant fire prevention effect.…”

Section: Introductionmentioning

confidence: 99%

Study on Inerting Characteristics of Gas Coal by the Inerting Concentration and Ratio of an Inert Gas Mixture

Yu,

Sha,

Jin

et al. 2024

ACS Omega

View full text Add to dashboard Cite

To study the effect of the inert gas mixture concentration and ratio on the spontaneous combustion reaction of gas coal, a combination of experimental research and theoretical analysis was used to study the pyrolysis and combustion kinetics characteristics of gas coal and further explore the influence of inert gas on the inerting characteristics of gas coal. Research has shown that during the entire heating reaction process of gas coal, the concentration of inert gases has little effect on the drying and desorption stages, but there is a significant lag phenomenon in the characteristic temperature points of active decomposition and degassing stages. Under the same concentration of mixed inert gases, the higher the relative percentage content of CO 2 , the more significant the change and the better the inhibitory effect. The higher the volume fraction of the inert gas, the higher the cross-temperature point. In the late stage of rapid heating of coal samples, when the volume fraction of inert gas is 40%, the rate of temperature rise increases rapidly. In a pure air environment, CO begins to be released at 80 °C, and when the temperature rises to 130 ∼ 140 °C, the concentration of CO begins to rapidly increase. Under inert conditions, the higher the relative percentage content of inert gas is, the higher the temperature point at which CO is generated. When the experimental conditions are a mixture of 30% N 2 and 10% CO 2 as inert gas, the optimal inerting effect has been achieved. The research results provide a theoretical basis for determining the optimal ratio of inert gas inerting concentrations to achieve fire prevention and extinguishing.

show abstract

Section: Introductionmentioning

confidence: 99%