کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6473362 | 1424520 | 2017 | 13 صفحه PDF | دانلود رایگان |
We present a thermodynamic model for the aqueous Mg2+ - Na+ - K+ - Clâ quaternary system based on symmetric electrolyte Non-Random Two Liquid (eNRTL) theory. This work is a continuation of our previous study on the aqueous Ca2+ - Na+ - K+ - Clâ quaternary system and part of a larger effort to develop a comprehensive engineering thermodynamic model for high salinity produced water in oil and gas production. The eNRTL theory requires two binary interaction parameters for each molecule-molecule, molecule-electrolyte, and electrolyte-electrolyte pair to correlate composition dependence of the solution nonideality. The binary interaction parameters, including their temperature coefficients, are identified for the (Mg2+-Clâ):H2O pair, (Mg2+-Clâ):(K+-Clâ) pair, and (Mg2+-Clâ):(Na+-Clâ) pair using available thermodynamic data. The binary parameters for the other pairs are taken directly from the literature. Together, the eNRTL model and the binary parameters yield a satisfactory thermodynamic model for the quaternary system and its subsystems with temperatures ranging from 273.15 to 473.15Â K and salt concentrations up to saturation.
Journal: Fluid Phase Equilibria - Volume 437, 15 April 2017, Pages 56-68