测定了压力0.5~3.0MPa、温度233.15~293.15K条件下CH4/m—C9H12(即均三甲苯)体系的二元汽液相平衡数据,用PR方程对CH4/m—C9H12体系的汽液相平衡数据进行关联,得到了二元交互作用参数。实验数据的偏差分析证明PR方程适合描述该体系。基于以上结果,并结合文献数据,计算了CH4/C2H4/m—C9H12三元体系的相平衡数据,并绘制了该三元体系的相图。结果表明,CH4和m—C9H12的相容性与C2H4和m—C9H12相比差异较大,m—C9H12是一种适合吸收C3H4的溶剂。
Isothermal vapor-liquid equilibrium (VLE) data for the CH4/m-C9H12 ( i. e. mesitylene) binary system have been measured under pressures of 0.5 to 3.0 MPa, and temperatures of 233.15 to 293.15 K. The VLE data were correlated by means of the Peng-Robinson equation and the interaction coefficient was calculated. Combination of the results with other data in the literature allowed the phase equilibrium data of the CH4//C2H4/m-C9H12 ternary system to be calculated. The phase diagram was also derived. The ternary system phase diagram showed that C2H4 dissolves to a much larger extent in m-C9H12 than in CH4, which means that m-C9H12 has the potential to absorb ethylene.