Evaluation of reliability of Coats-Redfern method for kinetic analysis of non-isothermal TGA

Ebrahimi‐Kahrizsangi, Reza; Abbasi, M.H.

doi:10.1016/s1003-6326(08)60039-4

Cited by 289 publications

(127 citation statements)

References 26 publications

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“…The kinetic parameters for the three stages of the thermal decomposition of the investigated samples were calculated using fraction conversion 0.1< α <0.8 obtained from a single thermos-analytical curve (heating rate 10 K/min). In this study, four calculation methods: Coats and Redfern [21] Eq. (7) and Madhysudanan-Krishnan-Ninan [22], Eq.…”

Section: Resultsmentioning

confidence: 99%

Understanding the Mechanism of Decomposition Reactions of Neat and Superplasticized ordinary Portland Cement Pastes Using Thermal Analysis

Gad¹,

Habib²,

Mousa³

2017

Epitoanyag - JSBCM

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Section: Resultsmentioning

confidence: 99%

Understanding the Mechanism of Decomposition Reactions of Neat and Superplasticized ordinary Portland Cement Pastes Using Thermal Analysis

Gad¹,

Habib²,

Mousa³

2017

Epitoanyag - JSBCM

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“…Kinetic studies were performed in a thermogravimetric analyzer based on Coats-Redfern method [10]. Usually, the change in extent of reaction (α) is used to research the solid state reactions kinetics: (1) In this equation, mo, m, dan m∞ are initial sample mass, sample mass at time t and sample mass at the end of experiment, respectively.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Optimized Heating Rate and Soot-catalyst Ratio for Soot Oxidation over MoO3 Catalyst

Mei¹,

Mei²,

Shan³

et al. 2017

Bull. Chem. React. Eng. Catal.

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MoO3 is now utilized as a promising catalyst due to its high activity and favorable mobility at low temperature. Its spectral data and surface microstructures were characterized by Fourier transform infrared spectra (FT-IR) and Field emission scanning electron microscope (FESEM). Thermo-analysis of the carbon black was performed over nano-MoO3 catalyst in a thermogravimetric analyzer (TGA) at various heating rates and soot-catalyst ratios. Through the analysis of kinetic parameters, we found that the heat transfer effect and diffusion effect can be removed by setting lower heating rates and soot-catalyst ratios. Therefore, a strategy for selecting proper thermogravimetric parameters were established, which can contribute to the better understanding of thermo-analytical process. Copyright

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“…18,19 Kinetics are basically related to the decomposition mechanisms and used as a starting tool to suggest mechanisms for the thermal dehydration and decomposition; therefore it is strongly recommended that the selection of correct model is a critical point in kinetic analysis to justify experimental data. 19 Consequently, a number of methods have been developed for scientific and practical reasons to analyze solid-state kinetic data since they provide reliable information on the thermal behavior and character of solids transformation during the isothermal or non-isothermal heating.…”

Section: Kinetics Of Dehydration Of Bi-metallic Zeolitesmentioning

confidence: 99%

Influence of alternative cations distribution in AgxLi96-x-LSX on dehydration kinetics and its selective adsorption performance for N2 and O2

2016

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Adsorption characteristics of pure gases N2 and O2 on various silver exchanged low silica X-type (AgxLi96-x-LSX) zeolites were investigated. The equilibrium adsorption isotherms of N2 and O2 were measured at 273 and 298 K. Textual and structural properties of parent and resultant AgxLi96-x-LSX were characterized by XRD, BET surface area, and SEM techniques. Kinetics of their thermal dehydration were studied by exploiting thermogravimetric and differential data (TG-DTG) obtained at three heating rates (5, 10 and 15 K) using two model-free (Kissinger and Flynn-Wall-Ozawa) and one model fitting (Coats-Redfern) methods. Forty one mechanism functions were used to evaluate kinetic triplet (activation energy, frequency factor, and most probable mechanism/model) for different stages of dehydration. Results revealed that the impact of very small content of silver on the adsorption of N2 is pronounced and attributed to weak chemical bonds formed between N2 and Ag+ clusters due to strong adsorption of N2 at low pressure, whereas O2 adsorption is affected to a negligible extent. In addition, the N2/O2 adsorption selectivity shows unexpected low values for Ag87.08Li7.94Na0.98-LSX with higher Ag+ content (91.00 %), which might be due to low crystalline water content as well as Ag+ clusters located at SIII sites. N2 adsorption strongly depends on temperature as higher adsorption occurs at low temperature 273 K as compared to 298 K.

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Evaluation of reliability of Coats-Redfern method for kinetic analysis of non-isothermal TGA

Cited by 289 publications

References 26 publications

Understanding the Mechanism of Decomposition Reactions of Neat and Superplasticized ordinary Portland Cement Pastes Using Thermal Analysis

Understanding the Mechanism of Decomposition Reactions of Neat and Superplasticized ordinary Portland Cement Pastes Using Thermal Analysis

Optimized Heating Rate and Soot-catalyst Ratio for Soot Oxidation over MoO3 Catalyst

Influence of alternative cations distribution in AgxLi96-x-LSX on dehydration kinetics and its selective adsorption performance for N2 and O2

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