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测定了压力0.5~3.0 MPa、温度233.15~293.15 K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C2H4的溶剂。
The binary vapor-liquid equilibrium data of CH4 / m-C9H12 (ie, mesitylene) at pressures of 0.5-3.0 MPa and at 233.15-293.15 K were measured. The vapor-liquid phase of CH4 / m- Balance data to obtain the binary interaction parameters. The deviation analysis of the experimental data proves that the PR equation is suitable for describing the system. Based on the above results and the literature data, the phase equilibrium data of CH4 / C2H4 / m-C9H12 ternary system were calculated and the phase diagram of the ternary system was drawn. The results show that the compatibility of CH4 and m-C9H12 is quite different from that of C2H4 and m-C9H12, and m-C9H12 is a suitable solvent for C2H4 absorption.