Kinetics of solid state thermal decomposition reactions

Ninan, K. N.

doi:10.1007/bf01913047

Cited by 56 publications

(16 citation statements)

References 22 publications

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“…Mathematical analysis was performed on the TG data using the integral method of Coats and Redfern, [9] which has been used successfully for studies on the kinetics of decomposition of solid substances [10][11][12][13][14]. The activation energy (E) and 2 International Journal of Chemical Engineering the preexponential factor (A) for the degradation of PET, PTT, and PBT have been previously calculated from the TG curves.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Enthalpy-Entropy Compensation in Polyester Degradation Reactions

Al‐Mulla

2012

International Journal of Chemical Engineering

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In an earlier work the author had studied the degradation kinetics of polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), and polybutylene terephthalate (PBT) under nonisothermal conditions in air and N 2 at heating rates of 5, 10, 15, and 20• C/min. In this paper the kinetic degradation parameters of PET, PTT, and PBT were estimated using the CoatsRedfern method for two different weight loss regions ranging from 2-8% (Zone I) and 8-40% (Zone II). A comparative analysis of the enthalpy-entropy compensation effect for these polyesters in air and N 2 is presented. A linear relationship was found to exist between entropy and enthalpy values. The following criteria were applied to establish an enthalpy-entropy compensation effect and to check the presence of an isokinetic temperature: (a) Exner's plot of log k 3T1 versus log k 3T2 , and (b) Krug et al. linear regression of ΔH versus ΔG. By the use of the latter two methods, varying isokinetic temperatures were obtained. These temperatures were not in the range of the experimental work conducted, indicating that these systems do not display compensation phenomena.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Enthalpy-Entropy Compensation in Polyester Degradation Reactions

Al‐Mulla

2012

International Journal of Chemical Engineering

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“…Such parameters are often determined from small-scale tests such as ThermoGravimetric Analysis (TGA). TGA is a thermoanalytical technique commonly used in solid-phase thermal degradation studies (Ninan, 1989;White et al, 2011). It has gained widespread attention in the thermal analysis of biomass pyrolysis (Di Blasi, 2008;White et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

New experimental diagnostics in combustion of forest fuels: Microscale appreciation for a Macroscale approach

Cancellieri¹,

Leroy-Cancellieri²,

Silvani³

et al. 2018

Preprint

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“…The most common methods for managing olive mill waste disposal are landfilling, incineration and farmland applications, but none of these methods are exempt from drawbacks. Olive mill wastewater can be applied to agricultural, forest or disturbed lands as fertilizer [5][6][7][8][9]. However, the presence of metals and trace elements in wastewater limits their use in agricultural application as a fertilizer.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Starink Approach and Avrami Theory to Evaluate the Kinetic Parameters of the Pyrolysis of Olive Mill Solid Waste and Olive Mill Wastewater

My¹,

H²,

L³

et al. 2017

J Adv Chem Eng

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Journal of Advanced Chemical Engineering AbstractIn this study, the thermal behavior of two olive mill wastes samples such as olive mill solid waste (OMSW) and concentrated olive mill wastewater (COMWW) was examined at different heating rates ranging from 5 to 50 K/min in inert atmosphere using the technique of thermo gravimetric analysis. Avrami theory and iso-conversional Starink approach were used in this work to evaluate the kinetic parameters, including apparent activation energy (E a ) and reaction order (n). For the range of conversion degree investigated (20-80%), the values of apparent activation energy for olive mill solid waste (OMSW) were 147.51-158.79 KJ/mol and 200.13-212.51 KJ/mol for hemicellulose and cellulose respectively. Whilst the apparent activation energy of concentrated olive mill wastewater (COMWW) varied from 128.41 to 138.85 KJ/mol and from 201.3 to 226.67 KJ/mol for hemicellulose and cellulose respectively. With varied temperature (515-753 K), the corresponding values of reaction order was increased from 0.1004 and 0.1061 to 0.1787 and 0.2886, along with a decrease to 0.1220 and 0.1889 for OMSW and COMWW respectively.

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Kinetics of solid state thermal decomposition reactions

Cited by 56 publications

References 22 publications

Enthalpy-Entropy Compensation in Polyester Degradation Reactions

Enthalpy-Entropy Compensation in Polyester Degradation Reactions

New experimental diagnostics in combustion of forest fuels: Microscale appreciation for a Macroscale approach

Utilization of Starink Approach and Avrami Theory to Evaluate the Kinetic Parameters of the Pyrolysis of Olive Mill Solid Waste and Olive Mill Wastewater

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