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Binary system

About: Binary system is a research topic. Over the lifetime, 5788 publications have been published within this topic receiving 97882 citations.


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Journal ArticleDOI
TL;DR: In this paper, an electrolyte version of the Cubic Plus Association (eCPA) equation of state has been adapted to systems containing CH4, CO2, H2O and NaCl (up to 5 molal).

32 citations

Journal ArticleDOI
TL;DR: In this paper, the phase diagram of succinonitrile (SCN) and camphor binary system has been determined using different scanning calorimetry, a ring-heater, and the directional solidification technique.

32 citations

Journal ArticleDOI
TL;DR: In this article, the authors provided the first systematic characterization of the coformer effect in a chalcogenide glass system, and showed that the presence of a coformer leads to an increase in the electrical conductivity and a decrease of the activation energy.
Abstract: Non-oxide chalcogenide glasses based on more than one network former species have certain advantages for applications as solid electrolytes in batteries. To elucidate the influence of competitive glass-formation on the structural and motional properties of ionically conductive chalcogenide glasses, the system (Li2S)0.67[(B2S3)1−y (P2S5) y ]0.33 has been characterized comprehensively by DSC, electrical conductivity and6Li,7Li,31P, and11B solid state NMR techniques. The data obtained provide the first systematic characterization of the coformer effect in a chalcogenide glass system. Homogeneous glassy samples are formed fory=0.3 and 0.9≦y≦1.0, and microphase separated glasses for 0≦y≦0.2. The presence of a coformer leads to an increase in the electrical conductivity and a decrease of the activation energy, as compared to either binary system (Li2S-B2S3 or Li2S-P2S5), but only if homogeneous glasses are formed. The NMR data, in conjunction with systematic DSC and NMR studies of the binary systems (Li2S)x(B2S3)1−x (0.50≦x≦0.75) and (Li2S) x (P2S5)1−x (0.50≦x≦0.70), lead to the following conclusions: 1)11B MAS-NMR is well-suited to quantitate the amounts of three- and four coordinated boron atoms; in the binary glasses, the fraction of four-fold boron (N4) increases with decreasing Li2S/B2S3 ratio; in the ternary glasses N4 increases with increasingy. 2)31P MAS-NMR spectra of the binary glasses discriminate between three different phosphorus microenvironments, assigned to sulfide-analogs of metaphosphate, pyrophosphate, and orthophosphate species, respectively. These results suggest the applicability of network modification models originally developed for oxide glasses. For the ternary glasses, the DSC and NMR data of glasses with low phosphorus contents are consistent with a phase separation model involving a Li-rich thioborate glass that contains all of the phosphorus component and a glass phase less rich in lithium containing the four-fold boron atoms. In addition to the structural studies, the7Li spin-spin relaxation times (T 2) are used to characterize the mobility of the Li atoms. The activation energy of Li motion, determined from temperature dependentT 2 measurements and analyzed by using BPP theory differs from that determined from conductivity measurements by a factor of 2–3, possibly reflecting the inapplicability of this theory to the lithium diffusion process.

32 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compared phase behavior and scattering data obtained from SANS in water, nalkane, n−alkyl polyglycol ether (CiEj) mixtures, and showed that the same sequence exists in the binary system water/C4E1, where the surfaces become lines in the two-dimensional composition temperature planes.
Abstract: In a recent publication we compared phase behavior and scattering data obtained from SANS in water, n‐alkane, n‐alkyl polyglycol ether (CiEj) mixtures. By analyzing the scattering spectra using the Teubner–Strey formula, it is possible to determine a measure for the amphiphilic strength of each system called the amphiphilicity factor, fa. It was demonstrated that the amphiphilicity factor is constant on a variety of surfaces within the three‐dimensional space of composition and temperature. For instance, the Lifshitz surface, where fa=0, depends on composition and temperature and may be a precursor for the Lα phase. Here we show that the same sequence exists in the binary system water/C4E1, where the surfaces become lines in the two‐dimensional composition‐temperature planes. Variations in amphiphile concentration and solution temperature allow one to reach almost the entire accessible amphiphilicity scale (∞≳fa≳−1) within this simple binary mixture. The occurrence of the Lifshitz surface at high C4E1 con...

32 citations

Journal ArticleDOI
TL;DR: In this article, the separation of ethylene glycol (EG) and 1,2-butanediol (1, 2-BDO) azeotrope is a key technical problem in the synthesis process of EG via dimethyl oxalate (DMO) from syngas.
Abstract: The separation of ethylene glycol (EG) and 1,2-butanediol (1,2-BDO) azeotrope is a key technical problem in the synthesis process of EG via dimethyl oxalate (DMO) from syngas. On the basis of systematic investigation, aldolization is expected to be the solution to this industrial problem. Thus, the essential thermodynamics data were determined and correlated well by the corresponding thermodynamic equation, including the vapor pressure of 2-methyl-1,3-dioxolane (2MD) and 4-ethyl-2-methyl-1,3-dioxolane (4EMD), vapor–liquid equilibrium (VLE) data of binary mixture 2MD–4EMD at 101.3 kPa, and liquid–liquid equilibrium (LLE) data of binary system 4EMD–water at atmospheric conditions. The vapor–liquid–liquid equilibrium (VLLE) of binary system 4EMD–water has been successful predicted by LLE experimental data. Finally, the thermodynamics parameters were provided as a reference to design a separation process of the EG and 1,2-BDO mixture. The simulation and optimization results indicate that EG and 1,2-BDO could ...

32 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202339
202272
2021103
2020135
2019130
2018140