化工学报 ›› 2020, Vol. 71 ›› Issue (S1): 1-6.doi: 10.11949/0438-1157.20191346

• 热力学 • 上一篇    下一篇

聚甲醛二甲醚体系汽液平衡数据的测定与关联

宋卓栋(),张作毅,潘学龙,王云芳()   

  1. 中国石油大学(华东) 化学工程学院,山东 青岛 266580
  • 收稿日期:2019-11-06 修回日期:2019-12-06 出版日期:2020-04-25 发布日期:2020-05-22
  • 通讯作者: 王云芳 E-mail:song13061413380@163.com;yfwang@upc.edu.cn
  • 作者简介:宋卓栋(1992—),男,硕士研究生,song13061413380@163.com
  • 基金资助:
    国家重点研发计划项目(2018YFB06044800)

Determination and correlation of vapor-liquid equilibrium for polyoxymethylene dimethyl ether system

Zhuodong SONG(),Zuoyi ZHANG,Xuelong PAN,Yunfang WANG()   

  1. College of Chemical Engineering, China University of Petroleum, Qingdao 266580, Shandong, China
  • Received:2019-11-06 Revised:2019-12-06 Online:2020-04-25 Published:2020-05-22
  • Contact: Yunfang WANG E-mail:song13061413380@163.com;yfwang@upc.edu.cn

摘要:

通过改进的Rose汽液平衡釜在常压条件下测定了PODE2-PODE3二元体系的汽液平衡数据,对所测得的实验数据进行热力学一致性检验,结果表明所测汽液平衡可通过热力学一致性检验。使用Aspen Plus v8.8 模拟软件,分别对NRTL、Wilson、UNIQUAC活度系数模型进行关联,通过回归得到对应的二元交互作用参数,并将三种模型拟合所得到的汽液平衡数据与实验所得的数据相对比,得到拟合值与实验值的温度和气相组成的平均绝对偏差均不大于0.37 K和0.0044,表明3种模型的拟合结果与实验数据吻合均较好,偏差均在合理范围内。这些工作为化工数据库增添了精馏的基础数据,也为含PODE2和PODE3体系的精馏设计与工程设计的进一步深入研究奠定了基础。

关键词: 汽液平衡, 精馏数据, 聚甲醛二甲醚, 柴油添加剂, 关联

Abstract:

The vapor-liquid equilibrium data of the PODE2-PODE3 binary system was determined by the modified Rose vapor-liquid equilibrium reactor under normal pressure conditions. The thermodynamic consistency test was carried out on the measured experimental data, and the results showed that the measured vapor-liquid equilibrium could pass the thermodynamic consistency test. The Aspen Plus v8.8 simulation software was used to correlate the NRTL, Wilson, and UNIQUAC activity coefficient models respectively, and the corresponding binary interaction parameters are obtained through regression. By comparison, the average absolute deviations of the temperature and vapor phase composition between the fitted and experimental values are not more than 0.37 K and 0.0044, respectively, indicating that the fitted results of the three models are in good agreement with the experimental data, and the deviations are all within a reasonable range. This work adds basic data for distillation to the chemical database, and also lays the foundation for further research on distillation design and engineering design with PODE2 and PODE3 systems.

Key words: vapor-liquid equilibrium, rectification data, polyoxymethylene dimethyl ether, diesel addictive, correlation

中图分类号: 

  • O 642.42

表1

气相色谱分析条件"

色谱条件操作参数色谱条件操作参数
检测器氢离子火焰检测器分流比150∶1
色谱柱型号PONA(30 m×0.32 mm×0.5 μm)氮气流速/(ml/min)25
柱温初始温度60℃,保持1 min,然后以10℃/min的速率升温到220℃,保持5 min

氢气流速/(ml/min)

空气流速/(ml/min)

25

250

进样口温度/℃200进样量/μl0.2
检测器温度/℃220

表2

101.3 kPa下PODE2-PODE3汽液平衡数据及模型关联结果"

序号Texp/Kx1,expy1,expγ1γ2NRTLWilsonUNIQUAC
ΔT/KΔy1ΔT/KΔy1ΔT/KΔy1
1429.050.00000.00001.09061.00000.000.00000.000.00000.000.0000
2422.620.06400.23221.08651.00000.560.00210.560.00210.530.0027
3417.890.10640.35551.08401.00000.300.00270.310.00310.280.0024
4414.030.14810.43771.08171.00010.510.01060.540.00980.510.0105
5413.020.16990.48111.08061.00020.170.00990.130.00900.150.0097
6409.120.21390.55661.07821.00030.310.01020.370.00900.350.0096
7406.460.25580.61791.07601.00040.080.00860.150.00730.130.0080
8403.550.28790.66341.07421.00050.780.00320.870.00190.840.0026
9402.710.30770.68731.07301.00060.450.00100.530.00010.510.0005
10401.460.34040.70951.07111.00080.140.01120.050.01010.070.0108
11399.200.37040.73931.06921.00120.370.00870.460.00780.440.0085
12395.790.44680.79911.06381.00180.020.00560.050.00530.030.0060
13393.770.48940.82711.06031.00420.050.00370.100.00370.080.0044
14392.580.51850.84391.05771.00640.000.00280.030.00300.010.0037
15390.090.57450.86821.05221.00840.240.00550.240.00610.220.0067
16388.130.62960.89661.04611.01380.210.00560.170.00650.150.0071
17386.850.65960.90221.04241.02190.450.00530.390.00640.380.0069
18385.360.70210.92441.03691.02800.550.00240.470.00130.460.0008
19384.330.74070.93601.03151.05260.430.00210.340.00100.330.0006
20382.640.78710.95041.02471.07480.770.00320.660.00230.660.0020
21382.090.81480.95711.02051.09220.590.00250.480.00180.490.0015
22380.780.85130.96701.01501.12150.910.00300.810.00250.820.0024
23380.020.88590.97551.01001.15820.800.00300.720.00280.730.0027
24379.130.92290.98591.00531.21110.780.00440.720.00450.730.0044
25378.640.96740.99221.00111.30220.270.00010.240.00040.250.0003
26378.480.97810.99421.00051.33040.180.00040.170.00020.170.0003
27378.151.00001.00001.00001.40030.000.00000.000.00000.000.0000
最大绝对偏差0.910.01120.870.01010.840.0108
平均绝对偏差0.370.00440.350.00400.350.0043

表3

纯物质的Antoine方程参数"

物质ABCDEFTmin/KTmax/K
PODE219.285712124.74104.2000310.00380.00
PODE375.19498042.3146.137.4100313.83429.05

图1

lnγ1/γ2-x1图"

表4

热力学模型参数"

热力学模型模型参数
aijajibijbjiα
NRTL00537.23-333.040.3
Wilson00255.47-491.780.3
UNIQUAC00-284.29194.200.3
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