化工学报 ›› 2019, Vol. 70 ›› Issue (11): 4113-4122.DOI: 10.11949/0438-1157.20190360
收稿日期:
2019-04-08
修回日期:
2019-07-01
出版日期:
2019-11-05
发布日期:
2019-11-05
通讯作者:
桂霞
作者简介:
徐学满(1992—),男,硕士研究生,基金资助:
Received:
2019-04-08
Revised:
2019-07-01
Online:
2019-11-05
Published:
2019-11-05
Contact:
Xia GUI
摘要:
采用恒定容积法,在温度353.15、363.15、373.15 K下,测定了CO2在丙二醇甲醚醋酸酯(PMA)、二丙二醇甲醚醋酸酯(DPMA)、乙二醇丁醚醋酸酯(BAC)以及乙二醇苯醚醋酸酯(EPA)中的溶解度数据,压力最高可达11.73 MPa。结果表明CO2在醚酯体系中溶解度受温度、压强的影响较大,压强一定时,CO2在醚酯中溶解度随温度升高而减小;温度一定时,随着压强增大而增大;相同条件下,CO2在四种醚酯中溶解度大小为PMA< EPA<BAC<DPMA。通过变形Clausius - Clapeyron方程,计算得到CO2在醚酯溶剂中的Gibbs自由能Δsol G,溶解焓变Δsol H和熵变 Δsol S等热力学性质,从宏观热运动角度进一步解释了CO2的溶解机理,为开发新型CO2物理吸收剂提供理论支撑。
中图分类号:
徐学满, 桂霞, 云志. CO2在醚酯溶剂中的溶解度测定及热力学计算[J]. 化工学报, 2019, 70(11): 4113-4122.
Xueman XU, Xia GUI, Zhi YUN. Solubility determination and thermodynamic calculation of CO2in several ether esters[J]. CIESC Journal, 2019, 70(11): 4113-4122.
试剂 | 分子结构 | CAS | 纯度 | 来源 |
---|---|---|---|---|
CO2 | | 124-38-9 | 0.9999 | 创达气体 |
PMA | | 108-65-6 | 分析纯 | 阿拉丁 |
DPMA | | 88917-22-0 | 分析纯 | 阿拉丁 |
BAC | | 112-07-2 | 分析纯 | 阿拉丁 |
EPA | | 6192-44-5 | 分析纯 | 阿拉丁 |
表1 实验试剂
Table 1 Experimental reagents
试剂 | 分子结构 | CAS | 纯度 | 来源 |
---|---|---|---|---|
CO2 | | 124-38-9 | 0.9999 | 创达气体 |
PMA | | 108-65-6 | 分析纯 | 阿拉丁 |
DPMA | | 88917-22-0 | 分析纯 | 阿拉丁 |
BAC | | 112-07-2 | 分析纯 | 阿拉丁 |
EPA | | 6192-44-5 | 分析纯 | 阿拉丁 |
图1 实验装置流程图
Fig.1 Schematic diagram of apparatus 1—CO2 gas cylinder; 2—gas buffer tank; 3—temperature control apparatus;4—phase equilibrium kettle; 5—liquid injector; 6—atmospheric valve; 7—digital pressure transducer; 8—digital temperature transducer; 9—magnetic stirrer
设备 | 规格 | 精度 | 供应商 |
---|---|---|---|
高压相平衡釜 | 95 ml/35 MPa | ±0.05 ml | 海安华达 |
气体缓冲室 | 130 ml/50 MPa | ±0.05 ml | 海安华达 |
Pt-100铂电阻温度计 | 253~473 K | ±0.1 K | OMEGA |
硅芯片压力传感器 | 0~50 MPa | ±1 KPa | OMEGA |
表2 仪器规格
Table 2 Equipment specification
设备 | 规格 | 精度 | 供应商 |
---|---|---|---|
高压相平衡釜 | 95 ml/35 MPa | ±0.05 ml | 海安华达 |
气体缓冲室 | 130 ml/50 MPa | ±0.05 ml | 海安华达 |
Pt-100铂电阻温度计 | 253~473 K | ±0.1 K | OMEGA |
硅芯片压力传感器 | 0~50 MPa | ±1 KPa | OMEGA |
图2 CO2(1) + 正辛烷(2)二元体系的P-x-y相图(实心点表示实验值;空心点表示文献[28]值)
Fig.2 P-x-y phase diagram for CO2 (1) + n-octane (2) binary system(Filled symbols correspond to experimental values, open symbols correspond to literature values[28])
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.64 | 0.0771 | 0.9994 | 12.9624 | 0.0007 | 0.0007 |
1.38 | 0.1053 | 0.9987 | 9.4843 | 0.0015 | 0.0004 |
2.19 | 0.1456 | 0.9982 | 6.8558 | 0.0021 | 0.0005 |
3.01 | 0.1787 | 0.9979 | 5.5842 | 0.0026 | 0.0003 |
3.78 | 0.2217 | 0.9975 | 4.4993 | 0.0032 | 0.0002 |
4.62 | 0.2618 | 0.9969 | 3.8079 | 0.0042 | 0.0009 |
5.52 | 0.3061 | 0.9963 | 3.2548 | 0.0053 | 0.0007 |
6.36 | 0.3361 | 0.9955 | 2.9619 | 0.0068 | 0.0006 |
7.17 | 0.3892 | 0.9942 | 2.5545 | 0.0095 | 0.0004 |
8.13 | 0.4348 | 0.9936 | 2.2852 | 0.0113 | 0.0002 |
9.28 | 0.4956 | 0.9924 | 2.0024 | 0.0151 | 0.0007 |
10.31 | 0.5525 | 0.9911 | 1.7938 | 0.0199 | 0.0003 |
11.12 | 0.6003 | 0.9905 | 1.6500 | 0.0238 | 0.0005 |
T = 363.15 K | |||||
0.63 | 0.0675 | 0.9979 | 14.7837 | 0.0023 | 0.0009 |
1.35 | 0.1012 | 0.9970 | 9.8518 | 0.0033 | 0.0002 |
2.29 | 0.1314 | 0.9962 | 7.5814 | 0.0044 | 0.0007 |
3.24 | 0.1651 | 0.9954 | 6.0291 | 0.0055 | 0.0005 |
4.15 | 0.2034 | 0.9946 | 4.8899 | 0.0068 | 0.0003 |
5.22 | 0.2518 | 0.9931 | 3.9440 | 0.0092 | 0.0004 |
6.47 | 0.3043 | 0.9925 | 3.2616 | 0.0108 | 0.0009 |
7.45 | 0.3528 | 0.9913 | 2.8098 | 0.0134 | 0.0007 |
8.64 | 0.4105 | 0.9904 | 2.4127 | 0.0163 | 0.0005 |
9.88 | 0.4684 | 0.9883 | 2.1099 | 0.0220 | 0.0003 |
10.81 | 0.5255 | 0.9876 | 1.8794 | 0.0261 | 0.0009 |
T = 373.15 K | |||||
0.82 | 0.0642 | 0.9971 | 15.5312 | 0.0031 | 0.0007 |
1.89 | 0.1035 | 0.9954 | 9.6174 | 0.0051 | 0.0004 |
2.83 | 0.1304 | 0.9946 | 7.6273 | 0.0062 | 0.0002 |
3.75 | 0.1604 | 0.9928 | 6.1895 | 0.0086 | 0.0006 |
4.86 | 0.2033 | 0.9921 | 4.8800 | 0.0099 | 0.0007 |
5.91 | 0.2537 | 0.9914 | 3.9078 | 0.0115 | 0.0002 |
6.97 | 0.2822 | 0.9889 | 3.5397 | 0.0155 | 0.0005 |
7.81 | 0.3235 | 0.9882 | 3.0547 | 0.0174 | 0.0003 |
8.65 | 0.3578 | 0.9868 | 2.7580 | 0.0206 | 0.0004 |
9.84 | 0.4092 | 0.9853 | 2.4079 | 0.0249 | 0.0007 |
10.84 | 0.4557 | 0.9842 | 2.1598 | 0.0290 | 0.0002 |
11.73 | 0.5019 | 0.9833 | 1.9592 | 0.0335 | 0.0009 |
表3 不同温度下CO2(1)+丙二醇甲醚醋酸酯(2)汽液平衡数据
Table 3 Phase equilibrium data of CO2 (1) + PMA (2) at different temperatures
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.64 | 0.0771 | 0.9994 | 12.9624 | 0.0007 | 0.0007 |
1.38 | 0.1053 | 0.9987 | 9.4843 | 0.0015 | 0.0004 |
2.19 | 0.1456 | 0.9982 | 6.8558 | 0.0021 | 0.0005 |
3.01 | 0.1787 | 0.9979 | 5.5842 | 0.0026 | 0.0003 |
3.78 | 0.2217 | 0.9975 | 4.4993 | 0.0032 | 0.0002 |
4.62 | 0.2618 | 0.9969 | 3.8079 | 0.0042 | 0.0009 |
5.52 | 0.3061 | 0.9963 | 3.2548 | 0.0053 | 0.0007 |
6.36 | 0.3361 | 0.9955 | 2.9619 | 0.0068 | 0.0006 |
7.17 | 0.3892 | 0.9942 | 2.5545 | 0.0095 | 0.0004 |
8.13 | 0.4348 | 0.9936 | 2.2852 | 0.0113 | 0.0002 |
9.28 | 0.4956 | 0.9924 | 2.0024 | 0.0151 | 0.0007 |
10.31 | 0.5525 | 0.9911 | 1.7938 | 0.0199 | 0.0003 |
11.12 | 0.6003 | 0.9905 | 1.6500 | 0.0238 | 0.0005 |
T = 363.15 K | |||||
0.63 | 0.0675 | 0.9979 | 14.7837 | 0.0023 | 0.0009 |
1.35 | 0.1012 | 0.9970 | 9.8518 | 0.0033 | 0.0002 |
2.29 | 0.1314 | 0.9962 | 7.5814 | 0.0044 | 0.0007 |
3.24 | 0.1651 | 0.9954 | 6.0291 | 0.0055 | 0.0005 |
4.15 | 0.2034 | 0.9946 | 4.8899 | 0.0068 | 0.0003 |
5.22 | 0.2518 | 0.9931 | 3.9440 | 0.0092 | 0.0004 |
6.47 | 0.3043 | 0.9925 | 3.2616 | 0.0108 | 0.0009 |
7.45 | 0.3528 | 0.9913 | 2.8098 | 0.0134 | 0.0007 |
8.64 | 0.4105 | 0.9904 | 2.4127 | 0.0163 | 0.0005 |
9.88 | 0.4684 | 0.9883 | 2.1099 | 0.0220 | 0.0003 |
10.81 | 0.5255 | 0.9876 | 1.8794 | 0.0261 | 0.0009 |
T = 373.15 K | |||||
0.82 | 0.0642 | 0.9971 | 15.5312 | 0.0031 | 0.0007 |
1.89 | 0.1035 | 0.9954 | 9.6174 | 0.0051 | 0.0004 |
2.83 | 0.1304 | 0.9946 | 7.6273 | 0.0062 | 0.0002 |
3.75 | 0.1604 | 0.9928 | 6.1895 | 0.0086 | 0.0006 |
4.86 | 0.2033 | 0.9921 | 4.8800 | 0.0099 | 0.0007 |
5.91 | 0.2537 | 0.9914 | 3.9078 | 0.0115 | 0.0002 |
6.97 | 0.2822 | 0.9889 | 3.5397 | 0.0155 | 0.0005 |
7.81 | 0.3235 | 0.9882 | 3.0547 | 0.0174 | 0.0003 |
8.65 | 0.3578 | 0.9868 | 2.7580 | 0.0206 | 0.0004 |
9.84 | 0.4092 | 0.9853 | 2.4079 | 0.0249 | 0.0007 |
10.84 | 0.4557 | 0.9842 | 2.1598 | 0.0290 | 0.0002 |
11.73 | 0.5019 | 0.9833 | 1.9592 | 0.0335 | 0.0009 |
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.42 | 0.0816 | 0.9999 | 12.2537 | 0.0001 | 0.0002 |
0.95 | 0.1092 | 0.9997 | 9.1548 | 0.0003 | 0.0003 |
1.71 | 0.1459 | 0.9983 | 6.8424 | 0.0020 | 0.0007 |
2.46 | 0.1867 | 0.9979 | 5.3449 | 0.0026 | 0.0009 |
3.29 | 0.2286 | 0.9975 | 4.3635 | 0.0032 | 0.0005 |
4.27 | 0.2854 | 0.9971 | 3.4937 | 0.0041 | 0.0004 |
5.17 | 0.3334 | 0.9968 | 2.9898 | 0.0048 | 0.0009 |
6.09 | 0.3828 | 0.9966 | 2.6034 | 0.0055 | 0.0007 |
6.95 | 0.4342 | 0.9962 | 2.2943 | 0.0067 | 0.0002 |
7.79 | 0.4909 | 0.9957 | 2.0283 | 0.0084 | 0.0003 |
8.61 | 0.5448 | 0.9955 | 1.8273 | 0.0099 | 0.0009 |
9.46 | 0.5959 | 0.9949 | 1.6696 | 0.0126 | 0.0006 |
10.44 | 0.6497 | 0.9946 | 1.5309 | 0.0154 | 0.0007 |
T = 363.15 K | |||||
0.63 | 0.0781 | 0.9998 | 12.8015 | 0.0002 | 0.0004 |
1.48 | 0.1072 | 0.9995 | 9.3237 | 0.0006 | 0.0002 |
2.42 | 0.1473 | 0.9988 | 6.7807 | 0.0014 | 0.0003 |
3.39 | 0.1866 | 0.9981 | 5.3489 | 0.0023 | 0.0009 |
4.28 | 0.2468 | 0.9976 | 4.0421 | 0.0032 | 0.0007 |
5.33 | 0.2918 | 0.9972 | 3.4174 | 0.0040 | 0.0002 |
6.34 | 0.3489 | 0.9965 | 2.8561 | 0.0054 | 0.0004 |
7.51 | 0.4085 | 0.9952 | 2.4362 | 0.0081 | 0.0003 |
8.45 | 0.4605 | 0.9944 | 2.1594 | 0.0104 | 0.0006 |
9.52 | 0.5178 | 0.9931 | 1.9179 | 0.0143 | 0.0009 |
10.56 | 0.5672 | 0.9928 | 1.7504 | 0.0166 | 0.0005 |
11.38 | 0.6095 | 0.9909 | 1.6258 | 0.0233 | 0.0007 |
T = 373.15 K | |||||
0.71 | 0.0717 | 0.9985 | 13.9261 | 0.0016 | 0.0003 |
1.63 | 0.1014 | 0.9973 | 9.8353 | 0.0030 | 0.0004 |
2.59 | 0.1387 | 0.9967 | 7.1860 | 0.0038 | 0.0002 |
3.64 | 0.1758 | 0.9951 | 5.6604 | 0.0059 | 0.0009 |
4.71 | 0.2189 | 0.9944 | 4.5427 | 0.0072 | 0.0007 |
5.68 | 0.2613 | 0.9929 | 3.7998 | 0.0096 | 0.0002 |
6.88 | 0.3079 | 0.9913 | 3.2196 | 0.0126 | 0.0005 |
7.96 | 0.3611 | 0.9905 | 2.7430 | 0.0149 | 0.0003 |
8.98 | 0.4155 | 0.9885 | 2.3791 | 0.0197 | 0.0004 |
10.07 | 0.4668 | 0.9872 | 2.1148 | 0.0240 | 0.0002 |
11.36 | 0.5322 | 0.9864 | 1.8534 | 0.0291 | 0.0007 |
表4 不同温度下CO2(1)+乙二醇苯醚醋酸酯(2)汽液平衡数据
Table 4 Phase equilibrium data of CO2 (1) + EPA (2) at different temperatures
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.42 | 0.0816 | 0.9999 | 12.2537 | 0.0001 | 0.0002 |
0.95 | 0.1092 | 0.9997 | 9.1548 | 0.0003 | 0.0003 |
1.71 | 0.1459 | 0.9983 | 6.8424 | 0.0020 | 0.0007 |
2.46 | 0.1867 | 0.9979 | 5.3449 | 0.0026 | 0.0009 |
3.29 | 0.2286 | 0.9975 | 4.3635 | 0.0032 | 0.0005 |
4.27 | 0.2854 | 0.9971 | 3.4937 | 0.0041 | 0.0004 |
5.17 | 0.3334 | 0.9968 | 2.9898 | 0.0048 | 0.0009 |
6.09 | 0.3828 | 0.9966 | 2.6034 | 0.0055 | 0.0007 |
6.95 | 0.4342 | 0.9962 | 2.2943 | 0.0067 | 0.0002 |
7.79 | 0.4909 | 0.9957 | 2.0283 | 0.0084 | 0.0003 |
8.61 | 0.5448 | 0.9955 | 1.8273 | 0.0099 | 0.0009 |
9.46 | 0.5959 | 0.9949 | 1.6696 | 0.0126 | 0.0006 |
10.44 | 0.6497 | 0.9946 | 1.5309 | 0.0154 | 0.0007 |
T = 363.15 K | |||||
0.63 | 0.0781 | 0.9998 | 12.8015 | 0.0002 | 0.0004 |
1.48 | 0.1072 | 0.9995 | 9.3237 | 0.0006 | 0.0002 |
2.42 | 0.1473 | 0.9988 | 6.7807 | 0.0014 | 0.0003 |
3.39 | 0.1866 | 0.9981 | 5.3489 | 0.0023 | 0.0009 |
4.28 | 0.2468 | 0.9976 | 4.0421 | 0.0032 | 0.0007 |
5.33 | 0.2918 | 0.9972 | 3.4174 | 0.0040 | 0.0002 |
6.34 | 0.3489 | 0.9965 | 2.8561 | 0.0054 | 0.0004 |
7.51 | 0.4085 | 0.9952 | 2.4362 | 0.0081 | 0.0003 |
8.45 | 0.4605 | 0.9944 | 2.1594 | 0.0104 | 0.0006 |
9.52 | 0.5178 | 0.9931 | 1.9179 | 0.0143 | 0.0009 |
10.56 | 0.5672 | 0.9928 | 1.7504 | 0.0166 | 0.0005 |
11.38 | 0.6095 | 0.9909 | 1.6258 | 0.0233 | 0.0007 |
T = 373.15 K | |||||
0.71 | 0.0717 | 0.9985 | 13.9261 | 0.0016 | 0.0003 |
1.63 | 0.1014 | 0.9973 | 9.8353 | 0.0030 | 0.0004 |
2.59 | 0.1387 | 0.9967 | 7.1860 | 0.0038 | 0.0002 |
3.64 | 0.1758 | 0.9951 | 5.6604 | 0.0059 | 0.0009 |
4.71 | 0.2189 | 0.9944 | 4.5427 | 0.0072 | 0.0007 |
5.68 | 0.2613 | 0.9929 | 3.7998 | 0.0096 | 0.0002 |
6.88 | 0.3079 | 0.9913 | 3.2196 | 0.0126 | 0.0005 |
7.96 | 0.3611 | 0.9905 | 2.7430 | 0.0149 | 0.0003 |
8.98 | 0.4155 | 0.9885 | 2.3791 | 0.0197 | 0.0004 |
10.07 | 0.4668 | 0.9872 | 2.1148 | 0.0240 | 0.0002 |
11.36 | 0.5322 | 0.9864 | 1.8534 | 0.0291 | 0.0007 |
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.38 | 0.0875 | 0.9999 | 11.4274 | 0.0001 | 0.0004 |
0.99 | 0.1263 | 0.9998 | 7.9161 | 0.0002 | 0.0002 |
1.55 | 0.1679 | 0.9995 | 5.9529 | 0.0006 | 0.0007 |
2.25 | 0.2119 | 0.9987 | 4.7131 | 0.0016 | 0.0005 |
2.98 | 0.2547 | 0.9984 | 3.9199 | 0.0021 | 0.0003 |
3.83 | 0.3169 | 0.9976 | 3.1480 | 0.0035 | 0.0007 |
4.41 | 0.3714 | 0.9971 | 2.6847 | 0.0046 | 0.0005 |
5.35 | 0.4321 | 0.9965 | 2.3062 | 0.0062 | 0.0004 |
6.23 | 0.4851 | 0.9959 | 2.0530 | 0.0080 | 0.0002 |
6.94 | 0.5465 | 0.9954 | 1.8214 | 0.0101 | 0.0003 |
7.81 | 0.6017 | 0.9943 | 1.6525 | 0.0143 | 0.0005 |
8.66 | 0.6497 | 0.9938 | 1.5296 | 0.0177 | 0.0007 |
9.61 | 0.7028 | 0.9931 | 1.4131 | 0.0232 | 0.0004 |
T = 363.15 K | |||||
0.45 | 0.0782 | 0.9991 | 12.7762 | 0.0010 | 0.0002 |
1.22 | 0.1125 | 0.9985 | 8.8756 | 0.0017 | 0.0004 |
2.07 | 0.1645 | 0.9982 | 6.0681 | 0.0022 | 0.0005 |
3.03 | 0.2036 | 0.9976 | 4.8998 | 0.0030 | 0.0003 |
3.92 | 0.2468 | 0.9968 | 4.0389 | 0.0042 | 0.0007 |
4.84 | 0.2918 | 0.9962 | 3.4140 | 0.0054 | 0.0009 |
5.87 | 0.3489 | 0.9975 | 2.8590 | 0.0038 | 0.0002 |
6.81 | 0.4101 | 0.9964 | 2.4297 | 0.0061 | 0.0007 |
7.95 | 0.4775 | 0.9955 | 2.0848 | 0.0086 | 0.0004 |
8.89 | 0.5305 | 0.9941 | 1.8739 | 0.0126 | 0.0005 |
9.93 | 0.5796 | 0.9936 | 1.7143 | 0.0152 | 0.0002 |
10.75 | 0.6369 | 0.9925 | 1.5583 | 0.0207 | 0.0003 |
T = 373.15 K | |||||
0.77 | 0.0713 | 0.9987 | 14.0070 | 0.0014 | 0.0005 |
1.34 | 0.0925 | 0.9975 | 10.7838 | 0.0028 | 0.0002 |
2.15 | 0.1225 | 0.9964 | 8.1339 | 0.0041 | 0.0004 |
3.17 | 0.1709 | 0.9957 | 5.8262 | 0.0052 | 0.0009 |
4.31 | 0.2227 | 0.9942 | 4.4643 | 0.0075 | 0.0003 |
5.54 | 0.2802 | 0.9929 | 3.5435 | 0.0099 | 0.0005 |
6.62 | 0.3312 | 0.9913 | 2.9931 | 0.0130 | 0.0002 |
7.79 | 0.3939 | 0.9887 | 2.5100 | 0.0186 | 0.0004 |
8.86 | 0.4558 | 0.9872 | 2.1659 | 0.0235 | 0.0009 |
10.06 | 0.5085 | 0.9864 | 1.9398 | 0.0277 | 0.0007 |
11.34 | 0.5631 | 0.9847 | 1.7487 | 0.0350 | 0.0003 |
表5 不同温度下CO2(1)+ 乙二醇丁醚醋酸酯(2)汽液平衡数据
Table 5 Phase equilibrium data of CO2 (1) + BAC (2) at different temperatures
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.38 | 0.0875 | 0.9999 | 11.4274 | 0.0001 | 0.0004 |
0.99 | 0.1263 | 0.9998 | 7.9161 | 0.0002 | 0.0002 |
1.55 | 0.1679 | 0.9995 | 5.9529 | 0.0006 | 0.0007 |
2.25 | 0.2119 | 0.9987 | 4.7131 | 0.0016 | 0.0005 |
2.98 | 0.2547 | 0.9984 | 3.9199 | 0.0021 | 0.0003 |
3.83 | 0.3169 | 0.9976 | 3.1480 | 0.0035 | 0.0007 |
4.41 | 0.3714 | 0.9971 | 2.6847 | 0.0046 | 0.0005 |
5.35 | 0.4321 | 0.9965 | 2.3062 | 0.0062 | 0.0004 |
6.23 | 0.4851 | 0.9959 | 2.0530 | 0.0080 | 0.0002 |
6.94 | 0.5465 | 0.9954 | 1.8214 | 0.0101 | 0.0003 |
7.81 | 0.6017 | 0.9943 | 1.6525 | 0.0143 | 0.0005 |
8.66 | 0.6497 | 0.9938 | 1.5296 | 0.0177 | 0.0007 |
9.61 | 0.7028 | 0.9931 | 1.4131 | 0.0232 | 0.0004 |
T = 363.15 K | |||||
0.45 | 0.0782 | 0.9991 | 12.7762 | 0.0010 | 0.0002 |
1.22 | 0.1125 | 0.9985 | 8.8756 | 0.0017 | 0.0004 |
2.07 | 0.1645 | 0.9982 | 6.0681 | 0.0022 | 0.0005 |
3.03 | 0.2036 | 0.9976 | 4.8998 | 0.0030 | 0.0003 |
3.92 | 0.2468 | 0.9968 | 4.0389 | 0.0042 | 0.0007 |
4.84 | 0.2918 | 0.9962 | 3.4140 | 0.0054 | 0.0009 |
5.87 | 0.3489 | 0.9975 | 2.8590 | 0.0038 | 0.0002 |
6.81 | 0.4101 | 0.9964 | 2.4297 | 0.0061 | 0.0007 |
7.95 | 0.4775 | 0.9955 | 2.0848 | 0.0086 | 0.0004 |
8.89 | 0.5305 | 0.9941 | 1.8739 | 0.0126 | 0.0005 |
9.93 | 0.5796 | 0.9936 | 1.7143 | 0.0152 | 0.0002 |
10.75 | 0.6369 | 0.9925 | 1.5583 | 0.0207 | 0.0003 |
T = 373.15 K | |||||
0.77 | 0.0713 | 0.9987 | 14.0070 | 0.0014 | 0.0005 |
1.34 | 0.0925 | 0.9975 | 10.7838 | 0.0028 | 0.0002 |
2.15 | 0.1225 | 0.9964 | 8.1339 | 0.0041 | 0.0004 |
3.17 | 0.1709 | 0.9957 | 5.8262 | 0.0052 | 0.0009 |
4.31 | 0.2227 | 0.9942 | 4.4643 | 0.0075 | 0.0003 |
5.54 | 0.2802 | 0.9929 | 3.5435 | 0.0099 | 0.0005 |
6.62 | 0.3312 | 0.9913 | 2.9931 | 0.0130 | 0.0002 |
7.79 | 0.3939 | 0.9887 | 2.5100 | 0.0186 | 0.0004 |
8.86 | 0.4558 | 0.9872 | 2.1659 | 0.0235 | 0.0009 |
10.06 | 0.5085 | 0.9864 | 1.9398 | 0.0277 | 0.0007 |
11.34 | 0.5631 | 0.9847 | 1.7487 | 0.0350 | 0.0003 |
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.45 | 0.1073 | 0.9981 | 9.3020 | 0.0021 | 0.0005 |
0.83 | 0.1653 | 0.9975 | 6.0345 | 0.0030 | 0.0003 |
1.33 | 0.2174 | 0.9970 | 4.5860 | 0.0038 | 0.0006 |
1.96 | 0.2674 | 0.9959 | 3.7244 | 0.0056 | 0.0004 |
2.69 | 0.3231 | 0.9952 | 3.0802 | 0.0071 | 0.0004 |
3.33 | 0.3831 | 0.9946 | 2.5962 | 0.0088 | 0.0006 |
4.21 | 0.4391 | 0.9937 | 2.2630 | 0.0112 | 0.0007 |
5.03 | 0.4968 | 0.9928 | 1.9984 | 0.0143 | 0.0003 |
5.86 | 0.5518 | 0.9905 | 1.7950 | 0.0212 | 0.0005 |
6.63 | 0.6136 | 0.9886 | 1.6111 | 0.0295 | 0.0003 |
7.51 | 0.6675 | 0.9873 | 1.4791 | 0.0382 | 0.0004 |
8.41 | 0.7126 | 0.9857 | 1.3832 | 0.0498 | 0.0006 |
9.27 | 0.7665 | 0.9833 | 1.2828 | 0.0715 | 0.0002 |
T = 363.15 K | |||||
0.67 | 0.0983 | 0.9954 | 10.1261 | 0.0051 | 0.0004 |
1.25 | 0.1427 | 0.9869 | 6.9159 | 0.0153 | 0.0002 |
2.03 | 0.1992 | 0.9844 | 4.9418 | 0.0195 | 0.0007 |
2.66 | 0.2579 | 0.9836 | 3.8139 | 0.0221 | 0.0009 |
3.63 | 0.3112 | 0.9825 | 3.1571 | 0.0254 | 0.0001 |
4.42 | 0.3691 | 0.9812 | 2.6584 | 0.0298 | 0.0004 |
5.43 | 0.4262 | 0.9798 | 2.2989 | 0.0352 | 0.0005 |
6.46 | 0.4893 | 0.9783 | 1.9994 | 0.0425 | 0.0003 |
7.74 | 0.5642 | 0.9775 | 1.7325 | 0.0516 | 0.0006 |
8.68 | 0.6163 | 0.9764 | 1.5843 | 0.0615 | 0.0008 |
9.69 | 0.6664 | 0.9757 | 1.4641 | 0.0728 | 0.0002 |
10.59 | 0.7175 | 0.9733 | 1.3565 | 0.0945 | 0.0005 |
11.24 | 0.7516 | 0.9715 | 1.2926 | 0.1147 | 0.0004 |
T = 373.15 K | |||||
0.89 | 0.0925 | 0.9942 | 10.7481 | 0.0064 | 0.0007 |
1.53 | 0.1225 | 0.9878 | 8.0637 | 0.0139 | 0.0002 |
2.44 | 0.1734 | 0.9861 | 5.6869 | 0.0168 | 0.0004 |
3.41 | 0.2263 | 0.9854 | 4.3544 | 0.0189 | 0.0005 |
4.37 | 0.2871 | 0.9831 | 3.4242 | 0.0237 | 0.0002 |
5.52 | 0.3475 | 0.9815 | 2.8245 | 0.0284 | 0.0007 |
6.67 | 0.4071 | 0.9762 | 2.3979 | 0.0401 | 0.0003 |
7.82 | 0.4709 | 0.9747 | 2.0699 | 0.0478 | 0.0004 |
9.33 | 0.5315 | 0.9728 | 1.8303 | 0.0581 | 0.0002 |
10.37 | 0.5854 | 0.9711 | 1.6589 | 0.0697 | 0.0005 |
11.29 | 0.6434 | 0.9705 | 1.5084 | 0.0827 | 0.0007 |
表6 不同温度下CO2(1)+二丙二醇甲醚醋酸酯(2)汽液平衡数据
Table 6 Phase equilibrium data of CO2 (1) + DPMA (2) at different temperatures
P/MPa | x 1 | y 1 | K 1 | K 2 | δ |
---|---|---|---|---|---|
T = 353.15 K | |||||
0.45 | 0.1073 | 0.9981 | 9.3020 | 0.0021 | 0.0005 |
0.83 | 0.1653 | 0.9975 | 6.0345 | 0.0030 | 0.0003 |
1.33 | 0.2174 | 0.9970 | 4.5860 | 0.0038 | 0.0006 |
1.96 | 0.2674 | 0.9959 | 3.7244 | 0.0056 | 0.0004 |
2.69 | 0.3231 | 0.9952 | 3.0802 | 0.0071 | 0.0004 |
3.33 | 0.3831 | 0.9946 | 2.5962 | 0.0088 | 0.0006 |
4.21 | 0.4391 | 0.9937 | 2.2630 | 0.0112 | 0.0007 |
5.03 | 0.4968 | 0.9928 | 1.9984 | 0.0143 | 0.0003 |
5.86 | 0.5518 | 0.9905 | 1.7950 | 0.0212 | 0.0005 |
6.63 | 0.6136 | 0.9886 | 1.6111 | 0.0295 | 0.0003 |
7.51 | 0.6675 | 0.9873 | 1.4791 | 0.0382 | 0.0004 |
8.41 | 0.7126 | 0.9857 | 1.3832 | 0.0498 | 0.0006 |
9.27 | 0.7665 | 0.9833 | 1.2828 | 0.0715 | 0.0002 |
T = 363.15 K | |||||
0.67 | 0.0983 | 0.9954 | 10.1261 | 0.0051 | 0.0004 |
1.25 | 0.1427 | 0.9869 | 6.9159 | 0.0153 | 0.0002 |
2.03 | 0.1992 | 0.9844 | 4.9418 | 0.0195 | 0.0007 |
2.66 | 0.2579 | 0.9836 | 3.8139 | 0.0221 | 0.0009 |
3.63 | 0.3112 | 0.9825 | 3.1571 | 0.0254 | 0.0001 |
4.42 | 0.3691 | 0.9812 | 2.6584 | 0.0298 | 0.0004 |
5.43 | 0.4262 | 0.9798 | 2.2989 | 0.0352 | 0.0005 |
6.46 | 0.4893 | 0.9783 | 1.9994 | 0.0425 | 0.0003 |
7.74 | 0.5642 | 0.9775 | 1.7325 | 0.0516 | 0.0006 |
8.68 | 0.6163 | 0.9764 | 1.5843 | 0.0615 | 0.0008 |
9.69 | 0.6664 | 0.9757 | 1.4641 | 0.0728 | 0.0002 |
10.59 | 0.7175 | 0.9733 | 1.3565 | 0.0945 | 0.0005 |
11.24 | 0.7516 | 0.9715 | 1.2926 | 0.1147 | 0.0004 |
T = 373.15 K | |||||
0.89 | 0.0925 | 0.9942 | 10.7481 | 0.0064 | 0.0007 |
1.53 | 0.1225 | 0.9878 | 8.0637 | 0.0139 | 0.0002 |
2.44 | 0.1734 | 0.9861 | 5.6869 | 0.0168 | 0.0004 |
3.41 | 0.2263 | 0.9854 | 4.3544 | 0.0189 | 0.0005 |
4.37 | 0.2871 | 0.9831 | 3.4242 | 0.0237 | 0.0002 |
5.52 | 0.3475 | 0.9815 | 2.8245 | 0.0284 | 0.0007 |
6.67 | 0.4071 | 0.9762 | 2.3979 | 0.0401 | 0.0003 |
7.82 | 0.4709 | 0.9747 | 2.0699 | 0.0478 | 0.0004 |
9.33 | 0.5315 | 0.9728 | 1.8303 | 0.0581 | 0.0002 |
10.37 | 0.5854 | 0.9711 | 1.6589 | 0.0697 | 0.0005 |
11.29 | 0.6434 | 0.9705 | 1.5084 | 0.0827 | 0.0007 |
T/K | H/MPa | |||
---|---|---|---|---|
DPMA | BAC | EPA | PMA | |
353.15 | 13.62 | 15.01 | 17.49 | 20.02 |
363.15 | 16.31 | 18.42 | 19.66 | 22.46 |
373.15 | 18.95 | 20.96 | 22.97 | 25.03 |
表7 不同温度下CO2 + 醚酯体系的Henry常数
Table 7 Henry’s constant (H) of CO2 + ether esters at different temperatures
T/K | H/MPa | |||
---|---|---|---|---|
DPMA | BAC | EPA | PMA | |
353.15 | 13.62 | 15.01 | 17.49 | 20.02 |
363.15 | 16.31 | 18.42 | 19.66 | 22.46 |
373.15 | 18.95 | 20.96 | 22.97 | 25.03 |
溶剂 | Δsol G/(kJ·mol-1) | Δsol H/(kJ·mol-1) | Δsol S/(J·mol-1·K-1) |
---|---|---|---|
DPMA | 15.38 | -18.23 | -92.55 |
BAC | 15.75 | -17.54 | -91.67 |
EPA | 15.94 | -14.93 | -85.01 |
PMA | 16.37 | -12.36 | -79.11 |
表8 温度363.15 K时CO2 + 醚酯体系的热力学数据
Table 8 Thermodynamic data of CO2 + ether esters at 363.15 K
溶剂 | Δsol G/(kJ·mol-1) | Δsol H/(kJ·mol-1) | Δsol S/(J·mol-1·K-1) |
---|---|---|---|
DPMA | 15.38 | -18.23 | -92.55 |
BAC | 15.75 | -17.54 | -91.67 |
EPA | 15.94 | -14.93 | -85.01 |
PMA | 16.37 | -12.36 | -79.11 |
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