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  • 1
    Electronic Resource
    Electronic Resource
    Thermal Stability of Some Polynuclear Coordination Compounds in the Systems Ln(III)—Co(II)—Oxalate (1999)
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 103-111 
    Details
    ISSN: 1572-8943
    Keywords: Ln(III)–Co(II) coordination compounds ; non-isothermal kinetics ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This paper reports an investigation of the thermal stabilities of the class of coordination compounds containing lanthanide ions Ln(III) (Ln=La, Sm, Eu, Dy, Er), Co(II) ions and oxalate anions C2O 4 2− . The thermal decomposition steps were identified, and in some cases the values of the non-isothermal kinetic parameters were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010131617489
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  • 2
    Electronic Resource
    Electronic Resource
    Some problems concerning the evaluation of non-isothermal kinetic parameters (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 123-134 
    Details
    ISSN: 1572-8943
    Keywords: non-isothermal kinetics ; thermogravimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The validity of isoconversional methods used to evaluate the activation energy is discussed. The authors have shown that the Flynn-Wall-Ozawa and Friedman methods give results that agree with each other only if the activation energy does not change with the degree of conversion. A criterion for the reaction mechanism as expressed by the differential conversion function is suggested too.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01982692
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  • 3
    Electronic Resource
    Electronic Resource
    Steady-State Approximation. 5 (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 851-854 
    Details
    ISSN: 1572-8943
    Keywords: activation energy ; non-isothermal kinetics ; steady-state approximation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The example of the sequence of reactions $${\text{A}}\xrightarrow{{k_1 }}{\text{B}}\xrightarrow{{k_2 }}{\text{C}}$$ and the steady-state approximation are used to present a demonstration of the fact that the evolution of the reaction rates under non-isothermal conditions depends on the ratio of the activation energies and on the heating rate. At the same time, it is shown that, under isothermal conditions, the ratio of the activation energies plays no role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010130928799
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  • 4
    Electronic Resource
    Electronic Resource
    On the Validity of the Steady-State Approximation in Non-Isothermal Kinetics: Part IV. The case of constant rate thermal analysis (1999)
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 677-681 
    Details
    ISSN: 1572-8943
    Keywords: constant rate thermal analysis ; non-isothermal kinetics ; steady-state approximation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The paper investigates the validity of steady-state approximation for the case of constant rate thermal analysis experiments. It is shown that the approximation holds for the experiments run with a controlled rate of either the decomposition of the compound, or the production of gas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010173015831
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  • 5
    Electronic Resource
    Electronic Resource
    Improved Iterative Version of the Coats-Redfern Method to Evaluate Non-Isothermal Kinetic Parameters (1999)
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 683-700 
    Details
    ISSN: 1572-8943
    Keywords: evaluation of kinetic parameters ; F test ; improved Coats-Redfern method ; linear regression ; non-isothermal kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An improved version of the Coats-Redfern method of evaluating non-isothermal kinetic parameters is presented. The Coats-Redfern approximation of the temperature integral is replaced by a third-degree rational approximation, which is much more accurate. The kinetic parameters are evaluated iteratively by linear regression and, besides the correlation coefficient, the F test is suggested as a supplementary statistical criterion for selecting the most probable mechanism function. For applications, both non-isothermal data obtained by theoretical simulation and experimental data taken from the literature for the non-isothermal dehydration of Mg(OH)2 have been processed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010125132669
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  • 6
    Electronic Resource
    Electronic Resource
    Non-isothermal kinetics-current problems (1992)
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 37-49 
    Details
    ISSN: 1572-8943
    Keywords: heterogeneous kinetics ; non-isothermal kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden einige, in den vergangenen Jahren entwickelte experimentelle und theoretische Beiträge zur nichtisothermen Kinetik dargestellt. Besonders betont werden heterogene Kinetik mittels Q-Derivatografie, kinetischer Index der thermischen Stabilität sowie klassische nichtisotherme Umwandlungen (CNC).
    Notes: Abstract The author presents some experimental and theoretical contributions in non-isothermal kinetics developed in the last years. Special emphasis is given on heterogeneous kinetics with the help of Q-derivatograph, kinetic indexes of thermal stability and on the classical non-isothermal change (CNC).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02109107
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  • 7
    Electronic Resource
    Electronic Resource
    Pseudo-Inverse Matrix Method - A Direct Method for Non-Isothermal Kinetic Analysis (1998)
    Springer
    Journal of thermal analysis and calorimetry 54 (1998), S. 931-935 
    Details
    ISSN: 1572-8943
    Keywords: conversion function ; non-isothermal kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new method is reported for the evaluation of non-isothermal kinetic data for various forms of the conversion function. The algorithm is based on a pseudo-inverse matrix method. A description of the algorithm and some calculation examples are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010172710689
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  • 8
    Electronic Resource
    Electronic Resource
    Thermal Stability and Non-isothermal Decomposition Kinetics. Heteropolynuclear compounds of Cu(II) (2000)
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 977-984 
    Details
    ISSN: 1572-8943
    Keywords: coordination compounds ; non-isothermal kinetics ; thermal stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Data concerning the thermal behaviour of four heteropolynuclear compounds with the general formula [CuML(CH3COO)3] whereM=Ni(II), Zn(II), Mn(II) and Co(II); LH=2-amino-5-mercapto-1,2,3-thiadiazole were obtained. For the kinetically workable decomposition steps the values of the kinetic parameters were estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010147013942
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  • 9
    Electronic Resource
    Electronic Resource
    A Differential Method Which Uses Local Heating Rates to Evaluate Non-isothermal Kinetic Parameters (2000)
    Springer
    Journal of thermal analysis and calorimetry 60 (2000), S. 581-594 
    Details
    ISSN: 1572-8943
    Keywords: differential method ; evaluation of kinetic parameters ; local heating rate ; non-isothermal kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A differential method is proposed which uses local heating rates to evaluate non-isothermal kinetic parameters. The method allows to study the influence of the deviation of the true heating rate with respect to the programmed one on the values of the kinetic parameters. For application, the kinetic parameters of the following solid-gas decomposition reaction were evaluated: [Ni(NH3)6]Br2(s)→[Ni(NH3)2]Br2(s)+4NH3(g). The results obtained revealed significant differences between the values of the non-isothermal kinetic parameters obtained by using local heating rates and those obtained by using the programmed heating rate. It was also demonstrated that the kinetic equation which makes use of the local heating rates permits a better description of the experimental (α, t) data than the kinetic equation which uses the programmed constant heating rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010103206986
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  • 10
    Electronic Resource
    Electronic Resource
    On the Validity of the Steady-state Approximation in Non-isothermal Kinetics. Part III (2000)
    Springer
    Journal of thermal analysis and calorimetry 61 (2000), S. 209-218 
    Details
    ISSN: 1572-8943
    Keywords: non-isothermal kinetics ; numerical solution of differential kinetic equations ; steady-state approximation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The authors continue their considerations concerning the validity of the steady-state approximation in non-isothermal kinetics. A sequence of two first-order consecutive reactions with an active intermediate was subjected to kinetic analysis by numerical solution of the corresponding differential kinetic equations for a number of particular cases. The results demonstrated that the rate of change of concentration of the active intermediate is negligibly small if the assumption made in the isothermal case is also accepted for the non-isothermal case, i.e. k 2(T(t))〉〉 k 1(T(t)).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010189414530
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