Improving the accuracy of the Eyring equation by pseudo‐ideal solution model to predict the viscosity of the mono‐ethanol amine‐[Bmim] PF6 ionic liquid blends in a CO 2 capturing pilot plant

Using 1H NMR spectroscopy the complex-formation equilibria between halothane (2-bromo-2-chloro-1,1,1-trifluoroethane) and methyl tert-butyl ether or tetrahydrofuran in various inert solvents (hexane, heptane, decane, cyclohexane) were measured as a function of temperature. For two different association models (ideal solution and athermal solution), assuming only the formation of a 1:1 H-bonded complex, the equilibrium constants and the standard enthalpies of the complex-formation reaction were calculated. The ideal solution model provides values of the equilibrium constant that differ for different inert solvents. The athermal solution model makes this false solvent effect much smaller. For the low halothane concentration used, its dimerization was neglected. This assumption was verified experimentally. Keywords: 1H NMR, association, complex formation, halothane.

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Stability of Al2SiO5 solid solutions

Mineralogical Magazine and Journal of the Mineralogical Society ◽

10.1180/minmag.1968.036.282.12 ◽

1968 ◽

Vol 36 (282) ◽

pp. 839-849 ◽

Cited By ~ 7

Author(s):

R. G. J. Strens

Keyword(s):

Solid Solution ◽

Solid Solutions ◽

Invariant Point ◽

Solution Model ◽

Stable Phase ◽

Ideal Solution ◽

Silicate Liquids ◽

The Stability ◽

Short Times ◽

Simultaneous Growth

SummaryAn ideal solution model has been used to calculate the effect of the substitutions on the stability fields of the Al2SiO5 minerals. The results show that divariant assemblages of andalusite+sillimanite and sillimanite + kyanite solid solutions can coexist over ranges of 0·1 to 0·4 kbar at 527° C, but that kyanite+andalusite would be stable over a much narrower range. On adding (Fe, Mn)3+ to the system, the andalusite/sillimanite curve can be considered to rotate about the invariant point, first eliminating the sillimanite field, and then penetrating the kyanite field. Wide zones of viridine+sillimanite and viridine+kyanite are thus formed.In view of the ease with which epitaxial nucleation occurs in the Al2SiO5 system, it is considered that extensive metastable growth of andalusite, sillimanite, and kyanite is improbable in nature. Metastable persistence is likely to occur in dry systems, or in the presence of an ‘armour’ of the stable phase, but reaction of millimetre-sized crystals should be completed in geologically short times when aqueous or silicate liquids are present. The combination of the effects of metastable persistence and solid solution seems adequate to account for essentially all the examples of kyanite + sillimanite and kyanite + andalusite, and for many sillimanite +andalusite assemblages. In addition, if small supersaturations develop during metamorphism, simultaneous growth of andalusite + sillimanite could occur over a restricted temperature range.

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Prediction of Glass Formation Regions by Calculation of Eutectics Using the Ideal-Solution Model

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.1991.tb08299.x ◽

1991 ◽

Vol 74 (9) ◽

pp. 2295-2298 ◽

Cited By ~ 2

Author(s):

Ding Yong ◽

Jiang Zhonghong

Keyword(s):

Glass Formation ◽

Solution Model ◽

Ideal Solution ◽

The Ideal

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Synthesis and nitrogen stability of ultrafine titanium carbonitride particles

Journal of Materials Research ◽

10.1557/jmr.2007.0024 ◽

2007 ◽

Vol 22 (1) ◽

pp. 233-237 ◽

Cited By ~ 8

Author(s):

Dong-Won Lee ◽

Jae-Hwan Ahn ◽

Hyungsik Chung

Keyword(s):

Titanium Carbide ◽

Solution Model ◽

Titanium Carbonitride ◽

Ideal Solution ◽

Mean Size

The ultrafine titanium carbonitride particles (TiC0.5N0.5) with 100 nm in mean size was successfully synthesized by nitridation treatment at ordinary temperatures, 1373∼1473 K of the nanostructured half-stoichiometric titanium carbide (TiC0.5) particles, which were produced by the magnesium reduction of gaseous TiCl4+1/4C2Cl4. In addition, the nitrogen stability for the produced titanium carbonitride particles at various temperatures and vacuum conditions was investigated experimentally and compared with values calculated by an ideal solution model.

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