水-乙酸-乙酸戊酯体系的等压汽液平衡  

Isobaric vapor-liquid equilibria for water+acetic acid+ n-penyl acetate

作　　者：畅伟贤[1] 徐欣荣[1] 李新利[1] 管国锋[1] 姚虎卿[1] 时钧[1] 

机构地区：[1]南京工业大学化学化工学院,江苏南京210009

出　　处：《化工学报》2005年第8期1379-1384,共6页CIESC Journal

摘　　要：用改进的Rose釜测定了水-乙酸、乙酸-乙酸戊酯、水-乙酸-乙酸戊酯在101.33kPa下的等压汽液平衡数据.考虑了乙酸在汽相中的缔合效应,用维里方程和Hayden-O’connell关联式修正了汽相的非理想性,用非线性最小二乘法关联了水-乙酸和乙酸-乙酸戊酯体系的汽液平衡数据,得出了NRTL和UNIQUAC方程的模型参数.用NRTL模型参数预测了三元汽液平衡数据,计算值与实验值吻合良好.Isobaric vapor-liquid equilibria （VLE） data for water-acetic acid, acetic acid-n-pentyl acetate, and water-acetic acid-n-pentyl acetate systems were measured at 101.33 kPa using an improved Rose still. The quality of the measured binary data was verified by using the thermodynamic consistency test. The association of acetic acid in vapor phase was considered. And the nonideality of vapor phase was corrected by Virial and Hayden-O＇ connell equations. The binary interaction parameters for the determination of liquid phase activity coefficients, expressed by the UNIQUAC and NRTL models, were obtained by applying the nonlinear least square method. The obtained NRTL model parameters from binary data were used to predict the ternary VLE data. For ternary system, the average absolute deviations （AAD） in vapor-phase mole fraction of water and acetic acid were independently 0. 0230 and 0. 0222 and AAD in the equilibrium temperature was 1.15 ℃.

关 键 词：汽液平衡 水 乙酸 乙酸戊酯 

分 类 号：O642.4[理学—物理化学]