| Full text | |
| Author(s): |
Sanches de Menezes, Davi Eber
;
Ralha, Thiago Waldowski
;
Mercier Franco, Luis Fernando
;
Pessoa Filho, Pedro de Alcantara
;
Robustillo Fuentes, Maria Dolores
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Brazilian Journal of Chemical Engineering; v. 35, n. 2, p. 12-pg., 2018-04-01. |
| Abstract | |
Binary and ternary systems composed of methane-water and methane-propane-water, respectively, were studied using high pressure differential scanning calorimetry. The methodology was validated by comparing results for the binary system to experimental data obtained in the literature. The hydrate dissociation temperatures for the ternary system (methane-propane-water) at 21 MPa were experimentally determined for different compositions of the gas mixture and mole fractions of propane higher than 0.1 in the ternary system. Our results are in good agreement with the values predicted by applying the Cubic Plus Association (CPA) equation of state coupled with van der Waals-Platteeuw model for the hydrate phase. Although experimental results are considered satisfactory for both binary and ternary systems, higher deviations between our values and the simulated ones for the ternary system, considering peak temperature instead of the extrapolated onset as the hydrate dissociation temperature, are believed to be a consequence of dynamic effects that promote the formation of a heterogeneous hydrate and are negligible for the binary system. (AU) | |
| FAPESP's process: | 15/23148-9 - Thermodynamic study on gas hydrate formation and dissociation |
| Grantee: | Davi Éber Sanches de Menezes |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 14/25740-0 - Study on the formation and dissociation of gas hydrates at high pressure |
| Grantee: | Maria Dolores Robustillo Fuentes |
| Support Opportunities: | Scholarships in Brazil - Young Researchers |
| FAPESP's process: | 14/02140-7 - Study on the formation and dissociation of gas hydrates |
| Grantee: | Maria Dolores Robustillo Fuentes |
| Support Opportunities: | Research Grants - Young Investigators Grants |