The solubility of two single gases, CO₂ and CH₄, was measured in the ionic liquid 1-benzyl-3-methylimidazolium nitrate ([Bzmim][NO₃]), at temperatures ranging from 298.15 to 343.15 K and pressures up to 4.52 MPa for CO₂ and 4.22 MPa for CH₄, where the CO₂ and CH₄ mole fractions reached to 0.29 and 0.09, respectively. The solubility measurements were performed in a stainless steel equilibrium cell. Under the experimental conditions, CO₂ showed a significantly higher solubility than CH₄. The CO₂ solubility decreased in [Bzmim][NO₃], when temperature was raised, while in the case of CH₄, the solubility increased slightly with the increase of temperature. In addition, the CO₂ solubility was compared to that of CH₄ using the ratio of the Henry’s constants of CH₄ over that of CO₂. The changes in ideal selectivity vs temperature showed that by the increase in temperature the ideal selectivity decreases.

_{在离子液体 1-benzyl-3-methylimidazolium nitrate ([Bzmim][NO 3} ])中测量了两种单一气体 CO ₂和 CH ₄的溶解度，温度范围为 298.15 至 343.15 K，压力高达 4.52 CO ₂的MPa和CH ₄的4.22 MPa ，其中CO ₂和CH ₄的摩尔分数分别达到0.29和0.09。溶解度测量是在不锈钢平衡池中进行的。在实验条件下，CO _{2 的}溶解度明显高于CH ₄。CO ₂在[Bzmim][NO _{3中的溶解度降低}]，当温度升高时，CH ₄的溶解度随着温度的升高而略有增加。此外，使用CH _{4的亨利常数与CO 2}的亨利常数之比将CO _{2溶解度与CH 4}的溶解度进行比较。理想选择性随温度的变化表明，随着温度的升高，理想选择性会降低。