Investigation of the thermodynamic properties of the binary system vitamin K3/carbon dioxide
| Autor: | Trupej Nina, Knez-Hrnčič Maša, Škerget Mojca, Knez Željko |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Chemical Industry and Chemical Engineering Quarterly, Vol 23, Iss 4, Pp 563-571 (2017) |
| Druh dokumentu: | article |
| ISSN: | 1451-9372 2217-7434 |
| DOI: | 10.2298/CICEQ160804009T |
| Popis: | The binary system of vitamin K3 and CO2 was investigated at temperatures of 40, 60 and 80 °C up to a pressure of 40 MPa. Solubility was measured by a static-analytic method. Partial molar volumes were determined by a method involving a vibrating tube densimeter. The solubility of vitamin K3 in CO2 is found as a function of pressure and temperature. The highest solubility (31.16×10-4 mol∙mol-1) was attained at a pressure of 25.40 MPa at temperature of 40°C. However, at temperature of 60°C and a pressure of 24.02 MPa, the solubility was 18.79×10-4 mol∙mol-1. Solubility was lower at a temperature of 80°C and a pressure of 22.06 MPa (6.48×10-4 mol∙mol-1). The partial molar volumes are negative and the dissolved vitamin K3 has a minor impact on the density of the solution of K3 in CO2 compared to the density of the pure CO2. |
| Databáze: | Directory of Open Access Journals |
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