A new technique for determination of the possible reaction mechanism from non-isothermal thermogravimetric data

Zuru, A. A.; Whitehead, R.; Griffiths, D. L.

doi:10.1016/0040-6031(90)80445-5

Cited by 21 publications

(6 citation statements)

References 35 publications

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“…When n = 1, then And when n ≠ 1, then The order of the reaction ( n ) can be determined from Kissinger's method using the following equation (Eqn (7)): 1 − α m = n 1/(1 − n ) , where α m is the fraction reacted at T m . Its application in different aspects of thermal analysis has been studied by various authors 43–45…”

Section: Kinetics Of Solid‐state Reactions Under Non‐isothermal Condimentioning

confidence: 99%

Kinetics of isothermal and non‐isothermal degradation of cellulose: model‐based and model‐free methods

Dahiya

Kumar

Müller-Hagedorn

et al. 2008

Polymer International

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BACKGROUND: The kinetics of the thermal decomposition of cellulosic materials is of interest from the viewpoint of flame retardancy for safety, optimization of incineration processes and reducing energy production from fossil sources and associated pollution. One essential step in these processes is the thermal degradation through mass and energy transport, which determines the rate of evolution of various types of products from cellulosic materials. RESULTS: Kinetic parameters have been determined using various model‐based and model‐free methods in the thermal degradation of cellulose up to 700 °C in helium atmosphere. The values of the activation energy obtained in isothermal processes and non‐isothermal processes have been found to be not far from each other. From the integral method, the random nucleation (F1)‐type mechanism has been found most probable for cellulose degradation having an activation energy, Ea, in the range 156.5–166.5 kJ mol−1, lnA = 20–23 min−1, for first‐order reaction during its decomposition process at heating rates of 2, 5 and 10 °C min−1. Based on the high correlation coefficient, many types of mechanisms seem equally good for non‐isothermal degradation of cellulose. CONCLUSION: The linear correlation coefficient has a limitation for verifying the correctness of a reaction mechanism in the study of degradation kinetics. Therefore, the correctness of a mechanism should be considered on the basis of comparing the kinetic parameters obtained from isothermal as well as non‐isothermal methods. Copyright © 2008 Society of Chemical Industry

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Section: Kinetics Of Solid‐state Reactions Under Non‐isothermal Condimentioning

confidence: 99%

Kinetics of isothermal and non‐isothermal degradation of cellulose: model‐based and model‐free methods

Dahiya

Kumar

Müller-Hagedorn

et al. 2008

Polymer International

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show abstract

“…The technology of TA has been widely used to reveal the thermal behavior and thermal character of solid-state reactions and the primary aim here is to establish the values of the apparent activation energy E, pre-exponential factor A in Arrhenius equation and choose the most probable mechanism function f(a) of a reaction [4,5]. The mathematical apparatus and calculation procedures used are rather versatile but all of them are related to the mathematical analysis of thermogravimetric curves [6][7][8]. The analysis of these curves allows establishing the mechanism of rate-controlled stage of the conversion and the values of the kinetic parameters characterizing it.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of non-isothermal kinetics of decomposition of calcium oxalate monohydrate

Vlaev

Nedelchev

Gyurova

et al. 2008

Journal of Analytical and Applied Pyrolysis

286

178

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“…The time dependence of the degree of transformation can be expressed in the form of a differential equation [6]:…”

Section: Resultsmentioning

confidence: 99%

Structural Polymeric Material Modified with Carbon Nanotubes

Burya

Ткачев

Mishchenko

et al. 2009

International Polymer Science and Technology

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A new technique for determination of the possible reaction mechanism from non-isothermal thermogravimetric data

Cited by 21 publications

References 35 publications

Kinetics of isothermal and non‐isothermal degradation of cellulose: model‐based and model‐free methods

Kinetics of isothermal and non‐isothermal degradation of cellulose: model‐based and model‐free methods

A comparative study of non-isothermal kinetics of decomposition of calcium oxalate monohydrate

Structural Polymeric Material Modified with Carbon Nanotubes

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