Measurement and modeling of poly(vinyl stearate) in supercritical fluids
| Autor: | Hun-Soo Byun, Woon-Hong Yeo, Bong-Seop Lee, Yong-Soo Kim |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Process Chemistry and Technology Butane 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Lower critical solution temperature Supercritical fluid 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Stearate Propane Phase (matter) Chemical Engineering (miscellaneous) Dimethyl ether Solubility 0210 nano-technology Waste Management and Disposal |
| Zdroj: | Journal of CO2 Utilization. 37:346-352 |
| ISSN: | 2212-9820 |
| DOI: | 10.1016/j.jcou.2020.02.011 |
| Popis: | The cloud-points (CPs) of poly(vinyl stearate) (PVS) in several fluids, such as carbon dioxide (CO2), propane, butane, propylene, 1-butene, and dimethyl ether (DME), and in their mixtures are reported herein. A high-pressure apparatus with a variable-volume view cell was used to measure the CPs of the PVS mixtures. The measured CP pressures for all the systems exhibited a lower critical solution temperature (LCST) phase behavior. The CPs for ternary systems consisting of CO2, DME, propylene, 1-butene, and PVS were distributed over the temperature range of 333−453 K and the pressure range of 35−203 MPa. To understand the effect of interactions between the solvents, co-solvents, and PVS at a molecular level, the perturbed-chain statistical associating fluids theory (PC-SAFT) model was applied to the modeling of these systems, and the predicted results were observed to be consistent with the tendency of experimental data. A theoretical investigation using the PC-SAFT model revealed some important information. The strong interactions between PVS and CO2 resulted in the high solubility of PVS in the CO2/DME mixture, while the weak interactions between CO2 and the co-solvent (i.e., propylene, 1-butene) increased the solubility of PVS in their mixtures. |
| Databáze: | OpenAIRE |
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