Abstract
In order to study the effect of H(2)S on gas adsorption in a coal seam, the adsorption characteristics of single-component CO(2), CH(4), N(2), and H(2)S and multicomponent H(2)S mixed with CO(2), CH(4), and N(2) by anthracite were simulated by using the Grand Canonical Ensemble Monte Carlo (GCMC) method. The results show that the adsorption capacity of CO(2), CH(4), N(2), and H(2)S in anthracite decreases with increasing temperature and increases with increasing pressure. The isothermal adsorption curves of CO(2), CH(4), N(2), and H(2)S and different proportions of H(2)S/CH(4), H(2)S/N(2), and H(2)S/CO(2) are highly consistent with the Langmuir equation, and the R (2) is above 0.99. Under different temperature and pressure conditions, the adsorption capacity of H(2)S and CO(2) is stronger than that of coal for N(2) and CH(4), and the adsorption capacity difference is about 3 mmol/g. There is competitive adsorption among H(2)S, CO(2), CH(4), and N(2), and H(2)S has a superior adsorption property. When H(2)S and other gases exist at the same time, the adsorption capacities of CH(4), N(2), and CO(2) are reduced by 48-60%, 81-91%, and 51-66%, respectively.