TY - JOUR
T1 - Phase equilibrium measurements for semi-clathrate hydrates of the (CO 2+N 2+tetra-n-butylammonium bromide) aqueous solution systems
T2 - Part 2
AU - Belandria, Veronica
AU - Mohammadi, Amir H.
AU - Eslamimanesh, Ali
AU - Richon, Dominique
AU - Sánchez-Mora, María F.
AU - Galicia-Luna, Luis A.
N1 - Funding Information:
This work was funded by the Agence Nationale de la Recherche (ANR) through SECOHYA ANR Research Program. FUNDAYACUCHO of Venezuela is acknowledged for providing Veronica Belandria with a PhD scholarship. Ali Eslamimanesh is grateful to MINES ParisTech for providing him with a PhD scholarship. María F. Sánchez-Mora would like to thank the CEP-TEP laboratory of MINES ParisTech for the opportunity to work as a trainee. María F. Sánchez-Mora especially thanks to Conacyt for the research scholarship in France during two months.
PY - 2012/5/25
Y1 - 2012/5/25
N2 - Equilibrium pressures for dissociation of the carbon dioxide (CO 2)+nitrogen (N 2)+tetra-n-butylammonium bromide (TBAB)+semi-clathrate (sc) hydrates have been experimentally measured to determine the stability regions and dissociation conditions of mixed CO 2+N 2+TBAB semi-clathrate hydrates. Semi-clathrates have been formed with the addition of TBAB aqueous solutions with mass fractions of (0.05 and 0.30). The relative molar fractions of CO 2 in the feed gas were (0.151, 0.399, and 0.749). Hydrate dissociation conditions have been measured using an isochoric pressure search method in the 275.1-291.0K temperature range and 0.67-19.07MPa pressure range. The obtained experimental clathrate hydrate dissociation data have been compared with the predictions of two thermodynamic models, namely CSMGem and HWHYD, available in open literature. Finally, the thermodynamic promotion effects of TBAB in aqueous solutions are discussed in terms of hydrate dissociation pressures and temperatures and consequently the most favorable operating conditions are proposed.
AB - Equilibrium pressures for dissociation of the carbon dioxide (CO 2)+nitrogen (N 2)+tetra-n-butylammonium bromide (TBAB)+semi-clathrate (sc) hydrates have been experimentally measured to determine the stability regions and dissociation conditions of mixed CO 2+N 2+TBAB semi-clathrate hydrates. Semi-clathrates have been formed with the addition of TBAB aqueous solutions with mass fractions of (0.05 and 0.30). The relative molar fractions of CO 2 in the feed gas were (0.151, 0.399, and 0.749). Hydrate dissociation conditions have been measured using an isochoric pressure search method in the 275.1-291.0K temperature range and 0.67-19.07MPa pressure range. The obtained experimental clathrate hydrate dissociation data have been compared with the predictions of two thermodynamic models, namely CSMGem and HWHYD, available in open literature. Finally, the thermodynamic promotion effects of TBAB in aqueous solutions are discussed in terms of hydrate dissociation pressures and temperatures and consequently the most favorable operating conditions are proposed.
KW - Carbon dioxide
KW - Experimental data
KW - Hydrate dissociation conditions
KW - Nitrogen
KW - Phase equilibria
KW - Semi-clathrate hydrates
KW - TBAB
KW - Thermodynamic promoter
UR - http://www.scopus.com/inward/record.url?scp=84860012744&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2012.02.020
DO - 10.1016/j.fluid.2012.02.020
M3 - Artículo
SN - 0378-3812
VL - 322-323
SP - 105
EP - 112
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -