Papers by Mehrdad Manteghian
Fluid Phase Equilibria, 2011
Liquid–liquid equilibrium data of the solubility curves and tie-line compositions were determined... more Liquid–liquid equilibrium data of the solubility curves and tie-line compositions were determined for ternary systems of water+acetyl acetone+propyl acetate at 288.15K, 298.15K and 313.15K and atmospheric pressure. Distribution coefficients were evaluated for the immiscibility region. The reliability of the experimental tie-lines has been confirmed by using Othmer–Tobias and Bachman correlation. The experimental data were fitted using the NRTL and UNIQUAC
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Nashrieh Shimi va Mohandesi Shimi Iran, Aug 23, 2017
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Polish Journal of Chemistry, 2009
In the present study, reaction crystallization of silver micron and nanoparticles was studied in ... more In the present study, reaction crystallization of silver micron and nanoparticles was studied in a batch crystallizer in two different set of experiments by reducing silver in the presence or absence of sodium citrate. From the experimental determination of crystal size distribution, and with the aid of a mathematical model of the process, nucleation and growth kinetics of silver nanoparticles were determined. Kinetic parameters were determined by fitting the power law expression to the experimental data. Nanoparticle growth rates indicate a diffusion controlled mechanism with a first order dependence on supersaturation, while the observed low dependence of nucleation rate on magma density imply the primary nucleation occurring. Nevertheless, in the synthesis of micron particles magma density was important and agglomeration took place and nucleation, volume crystal growth rates as well as agglomeration kernel were determined.
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Research Journal of Applied Sciences, Engineering and Technology, Jul 5, 2013
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Fullerenes Nanotubes and Carbon Nanostructures, May 26, 2015
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The Journal of Chemical Thermodynamics, Feb 1, 2020
Abstract Experimental and thermodynamic modeling results for hydrate dissociation conditions in c... more Abstract Experimental and thermodynamic modeling results for hydrate dissociation conditions in carbon dioxide + THF + NaCl + water systems were reported. Four different aqueous solutions of THF and NaCl (0.05 mass fraction of NaCl, 0.05 mass fraction of THF: namely solution 1; 0.10 mass fraction of NaCl, 0.05 mass fraction of THF: namely solution 2; 0.05 mass fraction of NaCl, 0.20 mass fraction of THF: namely solution 3; 0.10 mass fraction of NaCl, 0.20 mass fraction of THF: solution 4) were studied in this work. An isochoric pressure – search method was used to perform the measurements. The equilibrium dissociation conditions are reported in the ranges of (0.92–3.89) MPa and (280.9–292.9 K). NaCl acts as an inhibitor in all of the experiences, while THF acts as a promoter. Comparing our data with the same system in the absence of NaCl, a shift is observed toward the left in the equilibrium curve. In addition, this kind of shifting to the left in the curves is more observable at high pressures. In order to predict the equilibrium conditions, a thermodynamic model was developed which uses the Peng-Robinson equation of state and e-UNIQUAC activity coefficient model, for gas/vapor, aqueous electrolyte solution and promoter, respectively. The average absolute deviation of pressure for the model results is in the range of 0.06–0.08 MPa, which confirm the model accuracy.
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Materials Chemistry and Physics, Aug 1, 2018
Abstract In this paper, magnetic keratin as a new nanocomposite was synthesized to overcome the h... more Abstract In this paper, magnetic keratin as a new nanocomposite was synthesized to overcome the handling and separation problem coexist with keratin nanoparticles (KNPs). The nanocomposite was prepared by in-situ synthesis of Fe3O4 in a dilute aqueous solution of KNPs of 0.5 g/L using the co-precipitation method. The synthesized nanocomposite was characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA). Magnetic field implementation and XRD pattern confirmed that the nanocomposite was magnetic. The presence of amide I and II as well as Fe─O band in the FTIR analysis of the nanocomposite structure indicated that both Fe3O4 and keratin were present in its structure. Transmission electron microscopy (TEM) images showed that the nanocomposite had a mean diameter of 15.0 nm and a core-shell structure with a mean shell thickness of about 1.3 nm. Based on TGA, it was concluded that only 8.4% of the nanocomposite weight was assigned to keratin. Additionally, the vibrating sample magnetometry (VSM) analysis revealed that the magnetization of the nanocomposite was a little lower than Fe3O4. The nanocomposite also showed a good capability of Cu(II) adsorption as compared to the naked Fe3O4 and KNP by removing up to 98% of Cu(II) from aqueous solution.
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Journal of Materials Research
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Journal of Crystal Growth, Sep 1, 2022
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Nashrieh Shimi va Mohandesi Shimi Iran, Jan 21, 2020
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Papers by Mehrdad Manteghian