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Developing a Thermodynamical Method for Prediction of Activity Coefficient of TBP Dissolved in Kerosene

International Journal of Nonferrous Metallurgy 2013年第2期2卷 68-74页

作者： Eskandar Keshavarz Alamdari sayed khatiboleslam sadrnezhaad Department of Materials Science and Engineering Sharif University of Technology Tehran Iran Department of Mining and Metallurgical Engineering Amirkabir University of Technology Tehran Iran

Results of the experimental measurements on the partial molar volume of kerosene used as a medium for dissolving TBP are utilized to determine the activity of TBP in the binary kerosene-TBP solution through the application of Gibbs-Duhem equation. The treatment is based on combination of the experimental data with the thermodynamic values available on the compressibility factor of pure kerosene at room temperature. It is shown that the activity of TBP in kerosene has a positive deviation from ideality with an activity coefficient derived as follows:1) at X TBP ≤ 0.01: γ TBP = 42.530, 2) at the 0.01 X TBP 0.2: 3) at the higher TBP concentrations 0.2 X TBP 0.97: and 4) at TBP Raoultian concentrations 0.97 ≤ X TBP:γ TBP = 1. These quantities can be utilized at temperature closed to 298 K.

关键词： Thermodynamics Activity Activity Coefficient Kerosene TBP Organic Solution

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Surfactant-Free Production of Ni-Based Nanostructures

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Materials Sciences and Applications 2011年第5期2卷 444-452页

作者： Yaser Bahari Mollamahaleh Davood Hosseini Mehdi Mazaheri sayed khatiboleslam sadrnezhaad 不详

This paper introduces a facile surfactant-free method for fabrication of different types of Ni-based nanostructures including metallic nickel nanoparticles (MNNP), nickel oxide nanoparticles (NONP) and chip-like nickel oxide nanoflakes (CNONF) by solvothermal technique at 190°C. Nickel acetyl acetonate (Ni(ac ac)2) was used as nickel precursor for both MNNP and CNONF and NiCO3●2Ni(OH)2●nH2O was utilized for NONP. Organic alcohols including 1-hexanol and benzyl alcohol were used as solvent to produce all powders. The crystallite sizes of MNNP, NONP and CNONF were determined by X-ray diffraction (XRD) to be 30, 9 and 27 nm, respectively. Electron microscopy indicated final particle sizes of 80 nm and 20 nm for MNNP and NONP, respectively and a thickness-layer less than 90 nm for CNONF. Brunauer-Emmett-Teller (BET) experiment determined a high surface area of 68 m2/gr for CNONF.

关键词： Nanoparticles Nickel Nickel Oxide Chip-Like Nanoflakes Solvothermal Technique

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