Phase equilibrium for surfactant Ls-54 in liquid CO(2) with water and solubility estimation using the Peng-Robinson equation of state.
Phase equilibrium for surfactant Ls-54 in liquid CO(2) with water and solubility estimation using the Peng-Robinson equation of state.
复制标题
DOI：
10.1016/j.fluid.2010.07.020
复制
发表时间：
2010-11-25
影响因子：
2.6
通讯作者：
Matthews MA
中科院分区：
文献类型：
--
作者：
Tarafa PJ;Matthews MA
众所周知，商用表面活性剂Dehypon®Ls-54可溶于超临界CO2，并可形成水-CO2微乳液。在此工作中，我们观察了液相CO2区，在278.15 - 298.15 K范围内，Ls-54/CO2和Ls-54/水/CO2体系的相平衡。此外，利用Peng-Robinson状态方程（PREOS）模拟了Ls-54/CO2二元体系的相行为，并估算了水在CO2中的溶解度。在278.15 K和15.2 MPa下，Ls-54在CO2中的溶解度高达0.086 M。随着水浓度的增加，微乳液的稳定性降低，温度的降低有利于水在单相微乳液中的溶解度增加。对于Ls-54/CO2体系和水/CO2体系，PREOS模型与实验数据吻合较好。
It is known that the commercial surfactant Dehypon® Ls-54 is soluble in supercritical CO2 and that it enables formation of water-in-CO2 microemulsions. In this work we observed phase equilibrium for the Ls-54/CO2 and Ls-54/water/CO2 systems in the liquid CO2 region, from 278.15 - 298.15 K. In addition, the Peng-Robinson equation of state (PREOS) was used to model the phase behavior of Ls-54/CO2 binary system as well as to estimate water solubilities in CO2. Ls-54 in CO2 can have solubilities as high as 0.086 M at 278.15 K and 15.2 MPa. The stability of the microemulsion decreases with increasing concentration of water, and lower temperatures favor increased solubility of water into the one-phase microemulsion. The PREOS model showed satisfactory agreement with the experimental data for both Ls-54/CO2 and water/CO2 systems.
登录
查看更多内容
影响因子：
9.8
作者：
Chen, Qunlai;Beckman, Eric J.
通讯作者：
Beckman, Eric J.
影响因子：
3.3
作者：
Holmes, JD;Ziegler, KJ;Johnston, KP
通讯作者：
Johnston, KP
影响因子：
3.9
作者：
Mawson, S;Yates, MZ;Johnston, KP
通讯作者：
Johnston, KP
影响因子：
3.9
作者：
HARRISON, K;GOVEAS, J;OREAR, EA
通讯作者：
OREAR, EA
影响因子：
3.9
作者：
BARTLE, KD;CLIFFORD, AA;SHILSTONE, GF
通讯作者：
SHILSTONE, GF