摘要
实验测定了仲丁醇-正丁烷体系在0.5MPa和0.7MPa压力下的恒压汽液相平衡数据。温度和压力的测量精度分别为±0.05K和±6.4KPa。汽、液相组成分析的相对误差为±0.5％。用热力学方法对实测相平衡数据进行了关联,结果表明:非电解质溶液NRTL模型能较好描速仲丁醇-正丁烷体系的非理想行为。ASOG基团贡献模型对研究体系汽液相平衡组成的予测值与实测结果吻合较好。
The Vapor-Liquid equilibrium (VLE) data for the system 2-butano--nbutane were measured at 0.5 MPa and 0.7 MPa using an isobaric method.The estimated uncertainties in the measured temperature and prasure are ±0.05K and±6.4kPa, separately. The data of compositions in vapor and liquid phase have an estimated precision in ±0.5%,The experimental data were correlated by using thermodynamic method. The correlation results showed that nonelectrolyte solutions NRTL equation is satisfactory for the svstem 2-butanol--nbutane to represent the nonideality. The VLE composition data can be estimated from the group-contribution method ASOG.Agreement with experiment is good.
基金
石化总公司重点科学技术研究项目
关键词
相平衡
仲丁醇
正丁烷
equilibrium
2-Butanol
n-Butane
