On the use of  Diefallah’s composite integral method for the non-isothermal kinetic analysis of heterogeneous solid-gas reactions

Budrugeac, P.; Segal, E.

doi:10.1007/s10973-005-6831-4

Cited by 3 publications

(1 citation statement)

References 16 publications

(20 reference statements)

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“…The composite integral method I (Budrugeac and Segal, 2005;Gabal, 2003) is based on the Coats-Redfern equation (Coats and Redfern , 1964) which is rewritten as follows:…”

Section: Determination Of the Most Probable Reaction Mechanismmentioning

confidence: 99%

Kinetic Analysis of the Thermal Decomposition of Amitriptyline Hydrochloride by Nonisothermal Thermogravimetry

2019

Egyptian Journal of Applied Science

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The nonisothermal thermogravimetric decomposition of amitriptyline hydrochloride was investigated under pure nitrogen atmosphere at four different heating rates (β =5, 10, 15, 20 o C min-1). Friedman, Flynn-wall-Ozawa, and Tang isoconversional methods were used to calculate the activation energy E a. The results obtained was compared with that obtained by the distributed activation energy model, Miura procedure. Activation energy, E a, results showed that the isoconversional kinetic methods used (Friedman, Flynn-Wall-Ozawa and Tang methods) were in good agreement with each other, together with the distributed activation energy model. It was found that the activation energy E a was not really changed and was almost independent with respect to the level of conversion (α). This result suggests that the nonisothermal decomposition process of amitriptyline hydrochloride follows a single-step reaction. The master-plots were used to obtain the reaction kinetic model, which was confirmed by the integral composite I method. The kinetic triplet determined was, activation energy, E a = 74.68 kJmol-1 , pre-exponential factor, A= 3.71×10 3 min-1 and the reaction kinetic model follows the Avrami-Erofeev model, (nucleation and growth) , A4, f(α)= 4(1-α)[-ln(1-α)] 3/4 , g(α) =[-ln(1-α)] 1/4. 1-INTRODUCTION Amitriptyline hydrochloride (AMT), with trade names, Vanatrip, Elavil, Endep, is an antidepressant drug under tricyclic antidepressant group. AMT has been widely used in the treatment of chronic pain, regardless of the presence of depression (Burke et al.,2015). It is used to treat many psychological disorder including major depressive disorder, anxiety, attention-deficit hyperactivity disorder, and bipolar disorder (Dipalma and Katzung,1983). The thermal decomposition study, has received considerable attention all along the modern history, especially in the pharmaceutical field. Thermogravimetry, derivative thermogravimetry (TG/DTG) and differential thermal analysis (DTA), are analytic tools of high importance that helps in identifying the polymorphic forms, phase transitions, active-excipients

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“…The composite integral method I (Budrugeac and Segal, 2005;Gabal, 2003) is based on the Coats-Redfern equation (Coats and Redfern , 1964) which is rewritten as follows:…”

Section: Determination Of the Most Probable Reaction Mechanismmentioning

confidence: 99%

Kinetic Analysis of the Thermal Decomposition of Amitriptyline Hydrochloride by Nonisothermal Thermogravimetry

2019

Egyptian Journal of Applied Science

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Thermal degradation and decomposition of jute/vinylester composites

Álvarez

Rodríguez

Vázquez

2005

J Therm Anal Calorim

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Thermal hazard evaluation and risk assessment of 1-allyl-3-methylimidazole nitrate ionic liquid

Zhang,

Qian,

Zhang

et al. 2024

AIP Advances

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Imidazole ionic liquids (ILs) have broad application prospects in batteries and other fields. Researching the thermal decomposition features of ILs holds paramount importance for the application in battery electrolyte. 1-allyl-3-methylimidazole nitrate ionic liquid (IL) as a new functional IL, and its related thermal decomposition properties are unknown. In this paper, the thermal decomposition peculiarities of 1-allyl-3-methylimidazole nitrate IL were systematically analyzed by thermogravimetric analyzer, differential scanning calorimetry, and accelerating rate calorimeter techniques, and the relevant thermodynamic parameters and thermal decomposition models were derived. In addition, 1-allyl-3-methylimidazole nitrate IL possesses strong thermal runaway characteristics and the risk of thermal runaway is also evaluated. The main gaseous products formed by the pyrolysis of 1-allyl-3-methylimidazole nitrate IL was detected and analyzed by thermogravimetry-Fourier transform infrared spectroscopy and thermogravimetric-photoionization mass spectrometry techniques. The results showed that flammable gas, toxic gas, and asphyxiating gas are formed during the pyrolysis of 1-allyl-3-methylimidazole nitrate IL. This study lays a theoretical foundation for the safe application and the formulation of corresponding safety protection measures of 1-allyl-3-methylimidazole nitrate IL.

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On the use of Diefallah’s composite integral method for the non-isothermal kinetic analysis of heterogeneous solid-gas reactions

Cited by 3 publications

References 16 publications

Kinetic Analysis of the Thermal Decomposition of Amitriptyline Hydrochloride by Nonisothermal Thermogravimetry

Kinetic Analysis of the Thermal Decomposition of Amitriptyline Hydrochloride by Nonisothermal Thermogravimetry

Thermal degradation and decomposition of jute/vinylester composites

Thermal hazard evaluation and risk assessment of 1-allyl-3-methylimidazole nitrate ionic liquid

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