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| Fandino, Olivia; Ruffine, Livio. |
| Methane hydrate nucleation and growth from a bulk phase has been investigated using a quiescent high-pressure view cell. Several hydrate formation/dissociation cycles have been performed at two different initial pressures (10 MPa and 19.5 MPa). Every experiment was performed with a maximum of five consecutive cycles of cooling/heating. For each cycle, the induction time of incipient hydrate formation has been determined. On one hand, results obtained from cycles using fresh water led to the conclusion that the hydrate formation process is rather stochastic, with induction times varying over a large scale. On the other hand, the whole dataset enabled us to investigate on the controversial memory effect of water which may have the ability to fasten the... |
| Tipo: Text |
Palavras-chave: Methane hydrates; Nucleation; Growth; Quiescent reactor; Memory effect. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00159/27007/25260.pdf |
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| Fandino, Olivia; López Iglesias,, Enriqueta R.; Latas, Luis Lugo; Fernández Pérez, Josefa. |
| En este trabajo se han analizado diferentes m´etodos experimentales utilizados en la bibliograf´ýa para la investigaci´on del equilibrio de fases a alta presi´on y se presenta un nuevo equipo isoc´orico que ha sido implementado en nuestro laboratorio para la determinaci´on de la solubilidad de gases en l´ýquidos, similar al empleado por Wahlstr¨om y Vamling [1,2]. Adem´as, se ha determinado la solubilidad de CO2 en dos ´esteres de pentaeritritol (PEs), tetrapentanoato de pentaeritritol, PEC5, y tetra-2-etilhexanoato de pentaeritritol, PEBE8, en el rango de (283-333) K y hasta 7 MPa. Nuestros resultados han sido comparados con los obtenidos por Bobbo et al. [3,4] para los is´omeros de estos lubricantes, tetra- 2-metilbutanoato de pentaeritritol, PEBM5 y... |
| Tipo: Text |
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| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00692/80417/83554.pdf |
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