三聚甲醛-甲醛-水-BMIMNO<sub>3</sub>的汽液相平衡研究

李飞; 张涛; 吕莉; 唐文翔; 唐盛伟

doi:10.14135/j.cnki.1006-3080.20231210001

三聚甲醛-甲醛-水-BMIMNO₃的汽液相平衡研究

Effects of BMIMNO₃ on the Vapor-Liquid Equilibrium of Trioxane-Formaldehyde-Water System

摘要

摘要: 研究了离子液体BMIMNO₃对甲醛-水、三聚甲醛-水体系的汽液相平衡的影响。结果表明，BMIMNO₃的加入可以有效改善体系的汽液相平衡，加入一定量的BMIMNO₃可以使共沸现象消失。将非随机双液(NRTL)模型用于关联实验数据，三聚甲醛-水-BMIMNO₃三元物系的平均相对偏差为1.32%，甲醛-水-BMIMNO₃三元物系的平均相对偏差为1.74%。测量了三聚甲醛-甲醛-水-BMIMNO₃的汽液平衡数据，结果表明，BMIMNO₃的加入可以使平衡时汽相中的三聚甲醛摩尔浓度升高17.49%。研究结果对提高三聚甲醛汽相浓度具有理论指导意义。

Abstract: The effects of ionic liquids BMIMNO₃ on the vapor-liquid equilibria of formaldehyde-trioxane-water systems were studied. The results showed that adding BMIMNO₃ could effectively improve the vapor-liquid equilibrium of the system, and adding a certain amount of BMIMNO₃ could eliminate the azeotrope phenomenon. The non-random two-liquid (NRTL) model was used to fit the experimental data, and the average relative deviation of the trioxane-water-BMIMNO₃ ternary system was 1.32%, and the average relative deviation of the formaldehyde-water-BMIMNO₃ ternary system was 1.74%. The vapor-liquid equilibrium data of trioxane-formaldehyde-water-BMIMNO₃ were measured. The results showed that the addition of BMIMNO₃ could increase the molar concentration of trioxane in the vapor phase by 17.49%. The results are significance for increasing the concentration of trioxane in vapor phase.

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三聚甲醛-甲醛-水-BMIMNO3的汽液相平衡研究

Effects of BMIMNO3 on the Vapor-Liquid Equilibrium of Trioxane-Formaldehyde-Water System

三聚甲醛-甲醛-水-BMIMNO₃的汽液相平衡研究

Effects of BMIMNO₃ on the Vapor-Liquid Equilibrium of Trioxane-Formaldehyde-Water System