TY - JOUR
T1 - Study on the effect of TBAB and THF on the hydrate dissociation conditions for H2O + CO2 + C6H14 + C14H30 systems
AU - Díaz-Ramírez, Néstor L.
AU - Pimentel-Rodas, Alfredo
AU - Galicia-Luna, Luis A.
AU - Notario-López, Angel M.
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - In this study, hydrate dissociation conditions for the carbon dioxide + hexane + tetradecane + water systems were experimentally determined with or without Tetra-n-Butyl Ammonium (TBAB) or Tetrahydrofuran (THF), two water-soluble thermodynamic hydrate promoters. The equilibrium conditions were measured using the pressure-search method at constant volume in the temperature range from 274.8 to 291.5 K and pressure range from 1.45 to 3.97 MPa at (0, 0.1, 0.2 and 0.3) mass fraction of TBAB or THF in liquid solution. In order to verify the viability of the method used, the three-phase hydrate equilibria H-Lw-V of binary (CO2 + H2O) and ternary (CO2 + H2O + THF) systems were also measured and compared with the literature. Experimental measurements show that the addition of TBAB or THF expands the hydrate stability region significantly to a higher temperature at a specified pressure. The combined standard uncertainties were determined for temperature and pressure and are 0.19 K and 0.07 MPa, respectively. The relative standard uncertainty in composition was estimated to be 0.0013.
AB - In this study, hydrate dissociation conditions for the carbon dioxide + hexane + tetradecane + water systems were experimentally determined with or without Tetra-n-Butyl Ammonium (TBAB) or Tetrahydrofuran (THF), two water-soluble thermodynamic hydrate promoters. The equilibrium conditions were measured using the pressure-search method at constant volume in the temperature range from 274.8 to 291.5 K and pressure range from 1.45 to 3.97 MPa at (0, 0.1, 0.2 and 0.3) mass fraction of TBAB or THF in liquid solution. In order to verify the viability of the method used, the three-phase hydrate equilibria H-Lw-V of binary (CO2 + H2O) and ternary (CO2 + H2O + THF) systems were also measured and compared with the literature. Experimental measurements show that the addition of TBAB or THF expands the hydrate stability region significantly to a higher temperature at a specified pressure. The combined standard uncertainties were determined for temperature and pressure and are 0.19 K and 0.07 MPa, respectively. The relative standard uncertainty in composition was estimated to be 0.0013.
KW - Hexane
KW - Hydrates
KW - TBAB
KW - THF
KW - Tetradecane
UR - http://www.scopus.com/inward/record.url?scp=85124188587&partnerID=8YFLogxK
U2 - 10.1016/j.jct.2022.106750
DO - 10.1016/j.jct.2022.106750
M3 - Artículo
AN - SCOPUS:85124188587
SN - 0021-9614
VL - 168
JO - The Journal of Chemical Thermodynamics
JF - The Journal of Chemical Thermodynamics
M1 - 106750
ER -