Topic
Brine
About: Brine is a research topic. Over the lifetime, 6542 publications have been published within this topic receiving 76741 citations.
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TL;DR: In this paper, a novel cement fluid loss additive HTF-200C, which can resist high temperature and high salt content, was synthesized using the monomers of 2-acrylamido-2-methyl-propane sulphonic acid (AMPS), N, N-dimethyl acrylamide (DMAA), and a new compound with double carboxyl by the method of aqueous solution polymerization.
33 citations
TL;DR: In this paper, the freezing process of NaCl solutions using a combination of X-ray diffraction and molecular dynamics simulations (MD) for different saltwater concentrations, ranging from seawater conditions to saturation, is investigated.
Abstract: Studying the freezing of saltwater on a molecular level is of fundamental importance for improving freeze desalination techniques. In this study, we investigate the freezing process of NaCl solutions using a combination of X-ray diffraction and molecular dynamics simulations (MD) for different salt-water concentrations, ranging from seawater conditions to saturation. A linear superposition model reproduces well the brine rejection due to hexagonal ice Ih formation and allows us to quantify the fraction of ice and brine. Furthermore, upon cooling at T = 233 K, we observe the formation of NaCl·2H2O hydrates (hydrohalites), which coexist with ice Ih. MD simulations are utilized to model the formation of NaCl crystal hydrates. From the simulations, we estimate that the salinity of the newly produced ice is 0.5% mass percent (m/m) due to ion inclusions, which is within the salinity limits of fresh water. In addition, we show the effect of ions on the local ice structure using the tetrahedrality parameter and follow the crystallite formation using the ion coordination parameter and cluster analysis.
33 citations
TL;DR: In this paper, it was shown that the presence of inorganic electrolytes in the aqueous phase has a negligible impact on the gas-related interfacial tension decrement, and the compressed gas does not in turn alter the IFT increment due to the salt dissolved in the annealing phase.
32 citations
TL;DR: In slow illite precipitation processes, oriented aggregation of hexagonal nanoparticles forming the fibrous illite was observed, which provides new information for understanding scCO(2)-brine-mica interactions in saline aquifers with different brine cation compositions, which can be useful for GCS as well as other subsurface projects.
Abstract: For sustainable geologic CO2 sequestration (GCS), a better understanding of the effects of brine cation compositions on mica dissolution, surface morphological change, and secondary mineral precipitation under saline hydrothermal conditions is needed. Batch dissolution experiments were conducted with biotite under conditions relevant to GCS sites (55–95 °C and 102 atm CO2). One molar NaCl, 0.4 M MgCl2, or 0.4 M CaCl2 solutions were used to mimic different brine compositions, and deionized water was used for comparison. Faster ion exchange reactions (Na+–K+, Mg2+–K+, and Ca2+–K+) occurred in these salt solutions than in water (H+–K+). The ion exchange reactions affected bump, bulge, and crack formation on the biotite basal plane, as well as the release of biotite framework ions. In these salt solutions, numerous illite fibers precipitated after reaction for only 3 h at 95 °C. Interestingly, in slow illite precipitation processes, oriented aggregation of hexagonal nanoparticles forming the fibrous illite wa...
32 citations
TL;DR: In this article, a set of interfacial tension data between CO2 and a sodium chloride (NaCl) solution and the contact angle data was used to evaluate the capacity of CO2 storage.
Abstract: It is of great importance to investigate gas and water flow characteristics to better understand the geological CO2 sequestration process. The interfacial tension between CO2 and brine and the wettability of reservoir rocks are the most important parameters for two-phase flow in porous media that have a significant influence on the capacity of CO2 storage. In this paper, we present a set of interfacial tension data between CO2 and a sodium chloride (NaCl) solution and the contact angle data between CO2, NaCl and quartz by using a visual experimental method at multiple pressure, temperature and salinity conditions. We also performed simulations of CO2 and NaCl solution two-phase flow in quartz bead-packed beds by introducing interfacial tension and contact angle data into the pore network model to evaluate the relative permeability and capillary pressure. We found that the phase alternation of CO2 from a gas to its supercritical state has a significant influence on the wettability of pore surfaces and thus governs the capillary trapping mechanism. This indicates that CO2 sequestration efficiency in a saline aquifer will be greatly affected while CO2 is in its different phase states. The simulation results showed that a pore network model is available for the study of CO2 and brine two-phase flow characteristics in porous media. © 2015 American Institute of Chemical Engineers Environ Prog, 34: 1756–1762, 2015
32 citations