Is the original Kissinger equation obsolete today: not obsolete the entire non-isothermal kinetics?

Šesták, Jaroslav
July 2014
Journal of Thermal Analysis & Calorimetry;Jul2014, Vol. 117 Issue 1, p3
Academic Journal
Physical meaning of activation energy is analyzed from the viewpoint of non-isothermal kinetic evaluation. The term of heat inertia, meaning the degree of slowness with which the temperature of a body approaches that of its surroundings, is examined, and its impact on activation energy determination is discussed, which is particularly functional for a DTA peak kinetic appraisal. Impact of a process equilibrium background on kinetics is recollected as specifically important for Kissinger kinetic evaluation distinguishing competent case of glass cold crystallization on heating but unsuitable for melt crystallization on cooling without introducing additional thermodynamic terms. Parallel to non-Arrhenian kind of kinetics, an analogous model-free description is advocated accentuating a generalized approach by logistic functions.


Related Articles

  • Imperfections of Kissinger evaluation method and crystallization kinetics. Holba, P.; Šesták, J. // Glass Physics & Chemistry;Sep2014, Vol. 40 Issue 5, p486 

    The famous Kissinger's kinetic evaluation method (Anal. Chem. 1957) is examined with respect to: a) the relation between the DTA signal θ ( t) and the reaction rate r( t) ≡ dα/d t; b) the requirements on reaction mechanism model f(α); and c) the relation of starting kinetic...

  • THERMAL RESISTANCE OF POLYETHYLENE TEREPHTHALATE FIBRES. Velev, Valentin; Popov, Anton; Veleva, Lyubomira; Todorov, Nikola // Journal Scientific & Applied Research;2014, Vol. 6, p155 

    The thermal resistance of isotropic and orientated poly(ethylene terephthalate) (PET) samples was studied. Part of the oriented PET specimens was heat mechanically modified under different conditions. Using differential thermal analysis (DTA), thermal gravimetric analysis (TGA) and differential...

  • Thermal study on decomposition of LiBH at non-isothermal and non-equilibrium conditions. Pendolino, Flavio // Journal of Thermal Analysis & Calorimetry;Jun2013, Vol. 112 Issue 3, p1207 

    Thermal decomposition measurements for lithium borohydride (LiBH) are performed at non-isothermal and non-equilibrium conditions by means of differential thermal analysis (DTA). A simplified alternative procedure is introduced for evaluating thermodynamic and kinetic parameters simultaneously...

  • Kinetics and equilibrium adsorption study of lead(II) onto the low cost adsorbent--Eupatorium adenophorum spreng. Shenghui Guo; Wei Li; Libo Zhang; Jinhui Peng; Hongying Xia; Shiming Zhang // Process Safety & Environmental Protection: Transactions of the I;Sep2009, Vol. 87 Issue 5, p343 

    Adsorption of Pb(II) ions from aqueous solution onto a low cost adsorbent--the Eupatorium adenophorum spreng has been investigated to evaluate the effects of initial lead ion concentration, contact time, pH and temperature on the removal of Pb(II) systematically. The optimal pH value for Pb(II)...

  • Cd(II) Adsorption from Aqueous Solution onto Cucumis sativus Peel: Equilibrium, Thermodynamic and Kinetic Study. Pandey, Ruchi; Ansari, Nasreen Ghazi; Murthy, R. C.; Prasad, R. L. // Journal of Ecophysiology & Occupational Health;Dec2013, Vol. 13 Issue 3&4, p75 

    This paper reports the feasibility of using Cucumis sativus peel (CSP) for cadmium sorption from aqueous solution under different experimental conditions. Effect of various process parameters, viz. pH, adsorbent dose, contact time, initial concentration and temperature has been studied for the...

  • Enhanced adsorption of methylene blue on modified silica gel: equilibrium, kinetic, and thermodynamic studies. Kushwaha, Atul Kumar; Gupta, Neha; Chattopadhyaya, M. C. // Desalination & Water Treatment;Jun2014, Vol. 52 Issue 22-24, p4527 

    The present work was undertaken to chemically modify silica gel (SG) with citric acid (CA) to enhance its adsorption power for methylene blue (MB) dye from aqueous solution. Citric acid-modified silica gel (CAMSG) was synthesized thermochemically and was characterized by Fourier transform...

  • Phosphate sorption to quintinite in aqueous solutions: Kinetic, thermodynamic and equilibrium analyses. Jae-Hyun Kim; Jeong-Ann Park; Jin-Kyu Kang; Song-Bae Kim; Chang-Gu Lee; Sang-Hyup Lee; Jae-Woo Choi // Environmental Engineering Research;2015, Vol. 20 Issue 1, p73 

    The aim of this study was to examine the phosphate (P) removal by quintinite from aqueous solutions. Batch experiments were performed to examine the effects of reaction time, temperature, initial phosphate concentration, initial solution pH and stream water on the phosphate adsorption to...

  • Critical Evaluation and Thermodynamic Optimization of the NaO-FeO-FeO-SiO System. Moosavi-Khoonsari, Elmira; Jung, In-Ho // Metallurgical & Materials Transactions. Part B;Feb2016, Vol. 47 Issue 1, p291 

    A complete literature review, critical evaluation, and thermodynamic optimization of phase diagrams and thermodynamic properties of the NaO-FeO-FeO-SiO system were performed at 1 atm total pressure. A set of optimized model parameters obtained for all phases present in this system reproduces...

  • Kinetics, Equilibrium, and Thermodynamic Studies on Adsorption of Methylene Blue by Carbonized Plant Leaf Powder. Gunasekar, V.; Ponnusami, V. // Journal of Chemistry;2013, p1 

    Carbon synthesized from plant leaf powder was employed for the adsorption of methylene blue from aqueous effluent. Effects of pH (2,4,6,8, and 9), dye concentration (50,100,150, and 200 mg/dm³), adsorbent dosage (0.5,1.0,1.5, and 2.0 g/dm³), and temperature (303, 313, and 323 K) were...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics