CIESC Journal ›› 2020, Vol. 71 ›› Issue (8): 3444-3451.DOI: 10.11949/0438-1157.20191577
• Thermodynamics • Previous Articles Next Articles
Jinhui TAN(),Jumei XU,Yunhai SHI()
Received:
2019-12-25
Revised:
2020-05-25
Online:
2020-08-05
Published:
2020-08-05
Contact:
Yunhai SHI
通讯作者:
施云海
作者简介:
谈金辉(1994—),男,硕士研究生,基金资助:
CLC Number:
Jinhui TAN, Jumei XU, Yunhai SHI. Measurement and correlation of vapor-liquid equilibria for ethanol-water-potassium acetate system under atmospheric pressure[J]. CIESC Journal, 2020, 71(8): 3444-3451.
谈金辉, 徐菊美, 施云海. 常压下乙醇-水-醋酸钾系统汽液平衡数据的测定与关联[J]. 化工学报, 2020, 71(8): 3444-3451.
原料 | 纯度/ %(质量) | 原料及纯度来源 | 沸点/℃ | Antoine常数① | 温度范围, t /℃ | |||
---|---|---|---|---|---|---|---|---|
文献值 | 测定值 | A | B | C | ||||
无水乙醇,AR | >99.7 | 上海泰坦科技股份有限公司 | 78.29 | 78.15 | 8.0449 | 1554.3 | 222.65 | 1~197 |
无水醋酸钾,AR | >99.0 | 上海碧云天生物技术有限公司 | — | — | — | — | — | — |
超纯水 | >99.9 | 自制,气相色谱检测未见杂峰,经ICP检测,钙镁离子 总量低于0.1%(质量) | 100.00 | 99.87 | 8.0713 | 1730.6 | 233.42 | 1~100 |
Table 1 Chemical source and physical properties of pure components[7]
原料 | 纯度/ %(质量) | 原料及纯度来源 | 沸点/℃ | Antoine常数① | 温度范围, t /℃ | |||
---|---|---|---|---|---|---|---|---|
文献值 | 测定值 | A | B | C | ||||
无水乙醇,AR | >99.7 | 上海泰坦科技股份有限公司 | 78.29 | 78.15 | 8.0449 | 1554.3 | 222.65 | 1~197 |
无水醋酸钾,AR | >99.0 | 上海碧云天生物技术有限公司 | — | — | — | — | — | — |
超纯水 | >99.9 | 自制,气相色谱检测未见杂峰,经ICP检测,钙镁离子 总量低于0.1%(质量) | 100.00 | 99.87 | 8.0713 | 1730.6 | 233.42 | 1~100 |
t /℃ | x1 | y1 | γ1 | γ2 |
---|---|---|---|---|
99.48 | 0.0000 | 0.0000 | — | 1.0000 |
93.71 | 0.0225 | 0.2326 | 5.8912 | 0.9859 |
87.75 | 0.0646 | 0.3850 | 4.1914 | 1.0329 |
84.17 | 0.1146 | 0.4576 | 3.2006 | 1.1056 |
81.99 | 0.1942 | 0.5334 | 2.3880 | 1.1390 |
80.80 | 0.2684 | 0.5675 | 1.9227 | 1.2194 |
80.04 | 0.3751 | 0.6041 | 1.5074 | 1.3474 |
79.04 | 0.4987 | 0.6524 | 1.2722 | 1.5357 |
77.82 | 0.7093 | 0.7541 | 1.0836 | 1.9692 |
77.60 | 0.7936 | 0.8149 | 1.0555 | 2.1069 |
77.48 | 0.8858 | 0.8889 | 1.0363 | 2.2973 |
77.40 | 0.8882 | 0.8925 | 1.0410 | 2.2781 |
77.25 | 0.9803 | 0.9868 | 1.0489 | 1.5977 |
Table 2 VLE data for the system of EtOH(1)-H2O(2) at 101.325 kPa
t /℃ | x1 | y1 | γ1 | γ2 |
---|---|---|---|---|
99.48 | 0.0000 | 0.0000 | — | 1.0000 |
93.71 | 0.0225 | 0.2326 | 5.8912 | 0.9859 |
87.75 | 0.0646 | 0.3850 | 4.1914 | 1.0329 |
84.17 | 0.1146 | 0.4576 | 3.2006 | 1.1056 |
81.99 | 0.1942 | 0.5334 | 2.3880 | 1.1390 |
80.80 | 0.2684 | 0.5675 | 1.9227 | 1.2194 |
80.04 | 0.3751 | 0.6041 | 1.5074 | 1.3474 |
79.04 | 0.4987 | 0.6524 | 1.2722 | 1.5357 |
77.82 | 0.7093 | 0.7541 | 1.0836 | 1.9692 |
77.60 | 0.7936 | 0.8149 | 1.0555 | 2.1069 |
77.48 | 0.8858 | 0.8889 | 1.0363 | 2.2973 |
77.40 | 0.8882 | 0.8925 | 1.0410 | 2.2781 |
77.25 | 0.9803 | 0.9868 | 1.0489 | 1.5977 |
t /℃ | x1 | y1 | γ1 | γ2 |
---|---|---|---|---|
99.85 | 0.0000 | 0.0000 | — | 1.0000 |
90.66 | 0.0451 | 0.3968 | 5.7746 | 0.9196 |
88.05 | 0.0974 | 0.5331 | 4.2918 | 0.9096 |
83.06 | 0.1530 | 0.5947 | 3.5628 | 0.9924 |
81.34 | 0.2564 | 0.6204 | 2.3333 | 1.1173 |
80.33 | 0.3376 | 0.6575 | 1.9050 | 1.1489 |
79.66 | 0.4124 | 0.6835 | 1.6729 | 1.2364 |
78.83 | 0.5168 | 0.7425 | 1.4935 | 1.2619 |
78.38 | 0.6456 | 0.7960 | 1.3099 | 1.3942 |
78.01 | 0.7989 | 0.8676 | 1.1723 | 1.6214 |
77.73 | 0.8768 | 0.9200 | 1.1304 | 1.5948 |
77.84 | 0.9427 | 0.9655 | 1.1007 | 1.4772 |
78.14 | 0.9946 | 0.9974 | 1.0751 | 1.1993 |
Table 3 VLE data for the system of EtOH(1)-H2O(2)-10%(mass) KAc(3) at 101.325 kPa
t /℃ | x1 | y1 | γ1 | γ2 |
---|---|---|---|---|
99.85 | 0.0000 | 0.0000 | — | 1.0000 |
90.66 | 0.0451 | 0.3968 | 5.7746 | 0.9196 |
88.05 | 0.0974 | 0.5331 | 4.2918 | 0.9096 |
83.06 | 0.1530 | 0.5947 | 3.5628 | 0.9924 |
81.34 | 0.2564 | 0.6204 | 2.3333 | 1.1173 |
80.33 | 0.3376 | 0.6575 | 1.9050 | 1.1489 |
79.66 | 0.4124 | 0.6835 | 1.6729 | 1.2364 |
78.83 | 0.5168 | 0.7425 | 1.4935 | 1.2619 |
78.38 | 0.6456 | 0.7960 | 1.3099 | 1.3942 |
78.01 | 0.7989 | 0.8676 | 1.1723 | 1.6214 |
77.73 | 0.8768 | 0.9200 | 1.1304 | 1.5948 |
77.84 | 0.9427 | 0.9655 | 1.1007 | 1.4772 |
78.14 | 0.9946 | 0.9974 | 1.0751 | 1.1993 |
热力学模型 | 二元系统的方程特点 | 适用范围 | 优势 | 文献来源 |
---|---|---|---|---|
Wilson | 双参数方程 | 互溶系统 | 精度高、计算简单 | [ |
NRTL | 三参数方程 | 互溶系统、部分互溶系统 | 应用范围广、精度接近Wilson | [ |
UNIQUAC | 双参数方程、算式复杂 | 互溶系统、部分互溶系统、大分子的聚合溶液 | 应用范围广,且适用于特殊系统 | [ |
Table 4 Characteristics of the models
热力学模型 | 二元系统的方程特点 | 适用范围 | 优势 | 文献来源 |
---|---|---|---|---|
Wilson | 双参数方程 | 互溶系统 | 精度高、计算简单 | [ |
NRTL | 三参数方程 | 互溶系统、部分互溶系统 | 应用范围广、精度接近Wilson | [ |
UNIQUAC | 双参数方程、算式复杂 | 互溶系统、部分互溶系统、大分子的聚合溶液 | 应用范围广,且适用于特殊系统 | [ |
模型 | 模型参数 | RMSD | AAD | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A12 | A21 | B12/K | B21/K | C12 | |?t|/ ℃ | |?p|/kPa | |?x1| | |?y1| | |?t|/ ℃ | |?p|/kPa | |?x1| | |?y1| | |
eNRTL | 237.5640 | 14.5201 | -28855.48 | -4589.96 | 0.3 | 0.75 | 0.20 | 4.84×10-5 | 0.0095 | 0.72 | 0.29 | 3.73×10-5 | 0.0083 |
Wilson | 6.4947 | -0.5533 | -3115.36 | 188.88 | 0.82 | 0.22 | 9.59×10-5 | 0.0098 | 0.78 | 0.21 | 6.43×10-5 | 0.0077 | |
UNIQUAC | -18.0414 | 13.3354 | 6409.59 | -4905.56 | 0.80 | 0.23 | 6.58×10-5 | 0.0141 | 0.71 | 0.18 | 5.50×10-5 | 0.0101 |
Table 5 Parameters and deviations of activity coefficient models for the system of EtOH(1)-H2O(2) at 101.325 kPa
模型 | 模型参数 | RMSD | AAD | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A12 | A21 | B12/K | B21/K | C12 | |?t|/ ℃ | |?p|/kPa | |?x1| | |?y1| | |?t|/ ℃ | |?p|/kPa | |?x1| | |?y1| | |
eNRTL | 237.5640 | 14.5201 | -28855.48 | -4589.96 | 0.3 | 0.75 | 0.20 | 4.84×10-5 | 0.0095 | 0.72 | 0.29 | 3.73×10-5 | 0.0083 |
Wilson | 6.4947 | -0.5533 | -3115.36 | 188.88 | 0.82 | 0.22 | 9.59×10-5 | 0.0098 | 0.78 | 0.21 | 6.43×10-5 | 0.0077 | |
UNIQUAC | -18.0414 | 13.3354 | 6409.59 | -4905.56 | 0.80 | 0.23 | 6.58×10-5 | 0.0141 | 0.71 | 0.18 | 5.50×10-5 | 0.0101 |
组分 | 模型参数 | RMSD | AAD | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
i | j | Aij | Aji | Bij/K | Bji/K | Cij | |?t|/ ℃ | |?p|/ kPa | |?x1| | |?y1| | |?t|/ ℃ | |?p|/ kPa | |?x1| | |?y1| |
水 | [K+][Ac-] [K+][Ac-] | 5.4421 | -0.2720 | -0.7767 | -0.1618 | 0.2 | 0.30 | 0.073 | 6.23×10-5 | 0.0199 | 0.25 | 0.060 | 4.02×10-5 | 0.0168 |
乙醇 | 10.2812 | -2.5372 | 0.0866 | 179.4947 | 0.2 |
Table 6 Parameters and deviations of eNRTL activity coefficient model for the system of EtOH(1)-H2O(2)-10%(mass) KAc(3) at 101.325 kPa
组分 | 模型参数 | RMSD | AAD | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
i | j | Aij | Aji | Bij/K | Bji/K | Cij | |?t|/ ℃ | |?p|/ kPa | |?x1| | |?y1| | |?t|/ ℃ | |?p|/ kPa | |?x1| | |?y1| |
水 | [K+][Ac-] [K+][Ac-] | 5.4421 | -0.2720 | -0.7767 | -0.1618 | 0.2 | 0.30 | 0.073 | 6.23×10-5 | 0.0199 | 0.25 | 0.060 | 4.02×10-5 | 0.0168 |
乙醇 | 10.2812 | -2.5372 | 0.0866 | 179.4947 | 0.2 |
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Abstract 988
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