三聚甲醛-甲醛-水-[BMIM][NO3]的气液相平衡研究

Vapor-Liquid Equilibrium of Trioxane-Formaldehyde-Water-[BMIM][NO3]System

李飞 ¹张涛 ¹吕莉 ¹唐文翔 ¹唐盛伟¹

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作者信息

1. 四川大学化学工程学院,成都 610065
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摘要

研究了离子液体 1-丁基-3-甲基咪唑-硝酸盐([BMIM][NO3])对甲醛-水(FA-H2O)、三聚甲醛-水(TOX-H2O)体系的气液相平衡的影响.结果表明,[BMIM][NO3]的加入可以有效改善体系的气液相平衡,加入摩尔分数为 0.070的[BMIM][NO3]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,TOX-H2O-[BMIM][NO3]三元物系计算值与实验值的平均相对偏差为 1.32%,FA-H2O-[BMIM][NO3]三元物系计算值与实验值的平均相对偏差为1.74%.测定了TOX-FA-H2O-[BMIM][NO3]的气液平衡数据,结果表明,[BMIM][NO3]的加入可以使平衡时气相中的TOX摩尔分数增加 17.49%.研究结果对提高气相中TOX的摩尔分数具有理论指导意义.

Abstract

The effects of ionic liquids[BMIM][NO3]on the vapor-liquid equilibria of formaldehyde-trioxane-water(FA-TOX-H2O)systems were studied.The results showed that adding[BMIM][NO3]could effectively improve the vapor-liquid equilibrium of the system,and adding a certain amount of[BMIM][NO3]could eliminate the azeotrope phenomenon.The non-random two-liquid(NRTL)model was used to fit the experimental data.The average relative deviation between experimental and calculated values of the TOX-H2O-[BMIM][NO3]ternary system was 1.32%,and that of the FA-H2O-[BMIM][NO3]ternary system was 1.74%.The vapor-liquid equilibrium of TOX-FA-H2O-[BMIM][NO3]was measured.The results showed that the addition of[BMIM][NO3]could increase the molar fraction of TOX in the vapor phase by 17.49%.The results are significant for increasing the molar fraction of TOX in vapor phase.

关键词

三聚甲醛/甲醛/气液平衡/离子液体/NRTL模型

Key words

trioxane/formaldehyde/vapor-liquid equilibrium/ionic liquid/NRTL model

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出版年

2024

华东理工大学学报(自然科学版)

华东理工大学

华东理工大学学报(自然科学版)

CSCDCHSSCD北大核心

影响因子：0.289

ISSN：1006-3080

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