Adsorption model and mechanism of coal under high-strength electrical excitation

Based on the electric effect,thermal effect and induced polarization effect of coal response under electric field strengthening,a coal adsorption test system under high strength electric field was designed and constructed. The adsorption characteristics of coal to different adsorbates under real-time electric field loading were studied experimentally,and the coal adsorption model suitable for electric field was constructed based on the classical Langmuir and D-R adsorption models. The results showed that,under real-time loading of highstrength electric field,with the increase of electric field intensity,the adsorption capacity of coal decreases linearly,and the change rate of carbon dioxide adsorption capacity affected by electric field was larger. When the electric field intensity was 30,60 and 90 kV/m,the adsorption capacity of coal to methane decreased by 10. 9%,15. 7% and 18. 9%,while the adsorption capacity of carbon dioxide decreased by 8. 5%,12. 1% and 22. 9%.Based on the Langmuir adsorption model and