摘要
用改进的Rose釜测定了101.33kPa下醋酸-N-甲基乙酰胺、水-醋酸-N-甲基乙酰胺体系的汽液平衡数据,得到了N-甲基乙酰胺作为萃取剂时水与醋酸的平均相对挥发度。用NRTL、Wilson和UNIQUAC方程对醋酸-N-甲基乙酰胺体系的汽液平衡数据进行了关联,得到了相应的模型参数。用关联得到的醋酸-N-甲基乙酰胺体系的NRTL模型参数、三组水-醋酸体系的NRTL模型参数及二组水-N-甲基乙酰胺体系的NRTL模型参数推算了所测得水-醋酸-N-甲基乙酰胺体系的汽液平衡数据,水、醋酸及N-甲基乙酰胺汽相组成的平均偏差分别小于0.0176、0.0149、0.0064,温度的平均偏差小于1.91℃。
Isobaric vapor-liquid equilibria data for the binary system of acetic acid ＋ N-methylacetamide and the ternary system of water ＋ acetic acid ＋ N-methylacetamide were measured at 101,33 kPa by using an improved Rose still, The average relative volatility of water ＋ acetic acid system is 5,96 when N-methylacetamide is used as extractant. The measured VLE data of the binary system were verified by the thermodynamic consistency test and were correlated by NRTL, Wilson and UNIQUAC models, respectively, The obtained NRTL interaction parameters for the acetic acid ＋ N-methylacetamide system, 3 groups of NRTL interaction parameters of water ＋ acetic acid system and 2 groups of water ＋ N-methylacetamide system quoted from the literatures were used to predict the VLE data of the ternary system mentioned above. The predicted values of the ternary system agree well with the experimental results. The average absolute deviations of the vapor-phase mole fractions of water, acetic acid and N-methylacetamide are respectively less than 0,0176, 0.0149 and 0,0064, and the average absolute deviation of the equilibrium temperature is less than 1.91℃.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2007年第1期1-4,共4页
Journal of Chemical Engineering of Chinese Universities
关键词
水
醋酸
N-甲基乙酰胺
汽液平衡
water
acetic acid
N-methylacetamide
vapor-liquid equilibria
