In order to reveal the competitive adsorption characteristics of CH4 /CO2 mixed gas in coal. the isothermal adsorption experiments of five different ratios of CH4 /CO2 mixed gas in coal were carried out. Experiments show that the relationship between the adsorption amount of pure CH4 and pure CO2 and the gas pressure satisfies the Langmuir equation. Under the same conditions. https://allfixelectricales.shop/product-category/appliance-descaler/