Thermal decomposition of solid alkali perchlorates

Cordes, Herman F.; Smith, S. Ruven

doi:10.1021/j100852a053

Cited by 20 publications

(12 citation statements)

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“…Based on the values of activation energy and preexponential factor for the decomposition stage, the values of ∆S ≠ , ∆H ≠ and ∆G ≠ for the formation of activated complex from the reactant were calculated based on the following Equations (8-10) [30][31][32]…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

Synthesis, characterization and thermal decomposition of ethyl-2’-amino-5’-cyano-6’-(1H-indole-3yl)-2-oxospiro[indoline-3,4’-pyran]-3’-carboxylate under non‐isothermal condition in nitrogen atmosphere

Nalini

Jayachandramani²,

Suresh

et al. 2019

Eur J Chem

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A new compound, spiro-oxindole derivative compound namely ethyl-2ʹ-amino-5ʹ-cyano-6ʹ-(1H-indole-3yl)-2-oxospiro[indoline-3,4ʹ-pyran]-3ʹ-carboxylate (EACIOIPC) has been synthesized and characterized by microanalysis, FT-IR, mass spectrum and NMR (1H and 13C) techniques. The thermal decomposition of the compound was studied by thermogravimetric analysis under dynamic nitrogen atmosphere at different heating rates of 10, 15, 20 and 30 K/min. The kinetic parameters were calculated using model-free (Friedman’s, Kissinger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO) methods) and model-fitting (Coats and Redfern (CR)) methods. The decomposition process of EACIOIPC followed a single step mechanism as evidenced from the data. Existence of compensation effect is noticed for the decomposition of EACIOIPC. Invariant kinetic parameters are consistent with the average values obtained by Friedman and KAS in conversional methods.

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Section: Thermodynamic Parametersmentioning

confidence: 99%

Synthesis, characterization and thermal decomposition of ethyl-2’-amino-5’-cyano-6’-(1H-indole-3yl)-2-oxospiro[indoline-3,4’-pyran]-3’-carboxylate under non‐isothermal condition in nitrogen atmosphere

Nalini

Jayachandramani²,

Suresh

et al. 2019

Eur J Chem

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“…To get rid of this problem, the temperature integral has been solved using approximation methods and numerical solution methods [30].…”

Section: Kinetic Analysismentioning

confidence: 99%

Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Das

Bhattacharjee

2018

Int J of Chemical Kinetics

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The work deals with thermal decomposition of acetyl ferrocene in nitrogen atmosphere based on nonisothermal thermogravimetry. It presents a mathematical analysis of nonisothermal thermogravimetric data using multiheating rates to estimate reaction kinetic parameters. Model free (integral isoconversional) methods are employed to analyze the thermogravimetric data. The decomposition is a multistep process. The activation energy Eα of decomposition is conversion (α) dependent. The average values of activation energy are Eα = 49.87, 106.28, and 183.35 kJ mol−1 for three major steps of decomposition. The most probable reaction mechanism function, g(α), for thermal reactions has been identified by the master plot method, and the stepwise reaction mechanisms are found to be different for different steps. The estimated values of the activation energy Eα and g(α) have been utilized in the determination of the reaction rate Aα of thermal decomposition. The α‐dependent reaction rate values are determined and are found to lie in the range of 5.2 × 105 to 3.2 × 104 min−1, 1.7 × 1015 to 7.8 × 106 min−1, and 3.8 × 108 to 1.4 × 107 min−1 for three different steps. Based on the values of Eα, g(α), and Aα, the thermodynamic triplets (ΔS, ΔH, ΔG) associated with the decomposition reactions have been estimated. Estimated kinetic parameters have been used to construct the conversion curves, and those have been successfully compared with the experimentally observed ones.

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“…From the theory of the activated complex (transition state) of Eyring [51][52][53][54], the following general equation may be written:…”

Section: Calculation Of Thermodynamic Parametersmentioning

confidence: 99%

Thermal Decomposition Reaction of Ferrocene in the Presence of Oxalic Acid

Rooj

Roy

Bhattacharjee

2017

Int. J. Chem. Kinet.

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Thermal decomposition of ferrocene [(C 5 H 5 ) 2 Fe] in the presence of oxalic acid [(COOH) 2 ·2H 2 O] samples-prepared by grinding the mixtures of ferrocene and oxalic acid at different weight ratios-is reported in this work. It presents a mathematical analysis of nonisothermal thermogravimetric data using multiheating rates to estimate reaction kinetics as well as thermodynamic parameters. Model-free (integral isoconversional) methods are employed to analyze thermogravimetric data. The most probable reaction mechanisms for thermal reactions have been identified. Based on the values of the activation energy E α * and reaction rate A α for different steps of decomposition, the values of S*, H*, and G* for the formation of activated complex from the precursor are estimated. Besides, this work has proposed reaction pathways indicating the formation of hematite (α-Fe 2 O 3 ) as the solid end-product of thermal decomposition of the samples.

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Thermal decomposition of solid alkali perchlorates

Cited by 20 publications

References 0 publications

Synthesis, characterization and thermal decomposition of ethyl-2’-amino-5’-cyano-6’-(1H-indole-3yl)-2-oxospiro[indoline-3,4’-pyran]-3’-carboxylate under non‐isothermal condition in nitrogen atmosphere

Synthesis, characterization and thermal decomposition of ethyl-2’-amino-5’-cyano-6’-(1H-indole-3yl)-2-oxospiro[indoline-3,4’-pyran]-3’-carboxylate under non‐isothermal condition in nitrogen atmosphere

Kinetic Analysis of Nonisothermal Decomposition of Acetyl Ferrocene

Thermal Decomposition Reaction of Ferrocene in the Presence of Oxalic Acid

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