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We present the adsorption data of CO 2 , CH 4 , and N 2 ternary mixtures on anthracite from 293.15 to 353.15 K and pressures up to 7 MPa obtained via a volumetric method. The experimental data are given at different conditions, and simple analysis is made. The results show that the excess adsorption capacity of the CO 2 /CH 4 /N 2 mixture and its component gases decreases linearly with the increase of temperature for constant composition. The total adsorption capacity is between pure CO 2 and pure N 2 in the entire pressure range. The effect of total pressure on total adsorption capacity is mainly influenced by the CO 2 mole fraction in the feed gas. However, the adsorption capacities of CH 4 and N 2 decrease, and CO 2 presents a maximum with the decrease in total pressure. For the feed gases of 10% CH 4 and 16% CO 2 , the total adsorption capacity increases when the ratio of CO 2 and CH 4 increases, respectively, and the increasing magnitudes for 10% CH 4 are larger than that of 16% CO 2 . The obtained experimental data are in agreement with the extended three-parameter Ono-Kondo model.

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Adsorption Characteristics of CO2/CH4/N2 Ternary Mixtures on Anthracite from 293.15 to 353.15 K and Pressures Up to 7 MPa