Studies of dehydration kinetics of Li2SO4·H2O by the master plots method

Tang, Wanjun; Chen, Donghua

doi:10.2478/s11532-006-0049-6

Cited by 1 publication

(2 citation statements)

References 17 publications

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“…Equation is resulted from dividing Equation by Equation :

\frac{g (α)}{g (0.5)} = \frac{P (x)}{P (0.5)} .

Drawing the individual plots of both sides of Equation versus α will help to evaluate the kinetic model of the process by comparing the coincidence of experimental master plot

P false(x false) / P false(0.5 false)

with the theoretical master plot

g false(α false) / g false(0.5 false)

. To have P ( x ) at a given α, the value of E a for the process should be known, which were obtained in the previous section.…”

Section: Resultsmentioning

confidence: 99%

“…Drawing the individual plots of both sides of Equation 6 versus will help to evaluate the kinetic model of the process by comparing the coincidence of experimental master plot ( )∕ (0.5) with the theoretical master plot ( )∕ (0.5). To have P(x) at a given , the value of E a for the process should be known, [25][26][27] which were obtained in the previous section. Figure 7 presents the plot of ( )∕ (0.5) for the different steps at the three heating rates to evaluate the effect of heating rate.…”

Section: The Mechanism Of Isothermal Reduction and Carburizationmentioning

confidence: 99%

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Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂

Mohammadzadeh

Rezaie

Barati

et al. 2019

Int J of Chemical Kinetics

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The kinetics of simultaneous reduction and carburization of WO3─NiO nanocomposite powders by CO/CO2 was studied using a nonisothermal thermogravimetric analysis. The experiments were carried out at heating rates between 5 and 15°C/min, showing that the thermochemical processes can be divided into four steps, each dominated by a reaction, as following: NiO → Ni, WO3 → WO2, WO2 → W, and W → WC. The apparent activation energy for each step was obtained based on the Flynn‐Wall‐Ozawa isoconversional method for the individual steps, and the kinetic model was assessed by fitting master plots of various kinetic models for these steps at different heating rates. The Avrami‐Erofeev kinetic model was found to fit to the third and fourth steps and main part of the first, and the geometric contracting model fitted the best for the second step. Changing the heating rate did not affect the master plots of the third step. However, for the first step, increasing the heating rate made the Avrami‐Erofeev model the best‐fitting correlation and also for the second step the matching model changed at the highest heating rate (15°C/min) from a two‐dimensional contracting model (cylindrical particles) to a three‐dimensional contracting model (spherical particles).

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“…Equation is resulted from dividing Equation by Equation :

\frac{g (α)}{g (0.5)} = \frac{P (x)}{P (0.5)} .

Drawing the individual plots of both sides of Equation versus α will help to evaluate the kinetic model of the process by comparing the coincidence of experimental master plot

P false(x false) / P false(0.5 false)

with the theoretical master plot

g false(α false) / g false(0.5 false)

. To have P ( x ) at a given α, the value of E a for the process should be known, which were obtained in the previous section.…”

Section: Resultsmentioning

confidence: 99%

Section: The Mechanism Of Isothermal Reduction and Carburizationmentioning

confidence: 99%

Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂

Mohammadzadeh

Rezaie

Barati

et al. 2019

Int J of Chemical Kinetics

View full text Add to dashboard Cite

show abstract

Studies of dehydration kinetics of Li2SO4·H2O by the master plots method

Cited by 1 publication

References 17 publications

Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂

Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂

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Studies of dehydration kinetics of Li2SO4·H2O by the master plots method

Cited by 1 publication

References 17 publications

Kinetics of nonisothermal reduction and carburization of WO3─NiO nano‐composite powders by CO─CO2

Kinetics of nonisothermal reduction and carburization of WO3─NiO nano‐composite powders by CO─CO2

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Product

Resources

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Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂

Kinetics of nonisothermal reduction and carburization of WO₃─NiO nano‐composite powders by CO─CO₂