Journal ArticleDOI
Rational approximations of the integral of the Arrhenius function
G. I. Senum,Ralph T. Yang +1 more
Reads0
Chats0
TLDR
Rational approximations have been derived for the integral of the Arrhenius function dT which is important in the kinetic analysis of thermogravimetric data and is found to be equivalent to the Gorbachev approximation.Abstract:
Rational approximations have been derived for the integral of the Arrhenius function
$$\int\limits_0^T {\exp ( - E/RT)}$$
dT which is important in the kinetic analysis of thermogravimetric data. The first degree rational approximation is found to be equivalent to the Gorbachev approximation, i.e., RT2
exp (−E/RT)/(E+2RT). The second degree rational approximation is more accurate than the Zsako empirical approximation when E/RT 5. The third and higher degree rational approximations are found to be more accurate than any other previous approximation.read more
Citations
More filters
Journal ArticleDOI
Computer-determined kinetic parameters from TG curves: Part XVI
Leo Reich,Salvatore S. Stivala +1 more
TL;DR: In this article, rational approximations and an iterative computer procedure were employed to determine the activation energy of non-isothermal TG (NITG) curves, irrespective of reaction order (n) values.
Journal ArticleDOI
Pyrolysis of the hybrid energy cane: thermal decomposition and kinetic modeling using non-isothermal thermogravimetric analysis
TL;DR: In this paper, the thermal decomposition and reaction kinetics of the hybrid energy cane, as well as its thermochemical properties were investigated, and two mathematical approaches (single-step and multistep reaction models) were evaluated for pyrolysis.
Journal ArticleDOI
Nonisothermal decomposition kinetics of chromium–polyacrylate complexes prepared from aged Cr(III) solutions
Fatih Dogan,Fatih Dogan,Omer Ozturk,Omer Ozturk,Mehmet Yürekli,Ahmetnedim Ay,Dursun Ali Köse +6 more
TL;DR: In this paper, six kinetic methods were used to investigate the thermal decomposition behavior of poly(acrylic acid) (PAA) and its chromium-polyacrylate complexes prepared from Cr(III) solutions aged for different times.
Journal ArticleDOI
Evaluation of the kinetic and thermodynamic parameters in catalytic pyrolysis process of sunflower oil using Al-MCM-41 and zeolite H-ZSM-5
João Manuel Rêgo Silva,Aruzza Mabel de Morais Araújo,João Paulo da Costa Evangelista,Djalma Ribeiro da Silva,Amanda Duarte Gondim,Antonio Souza de Araujo +5 more
TL;DR: In this paper , a pyrolysis of sunflower oil was performed in the presence of H-ZSM-5 and Al-MCM-41 catalysts in different proportions, to qualitatively evaluate the effect of deoxygenation of pure oil in obtaining renewable hydrocarbons.
Journal ArticleDOI
On the curing kinetics of epoxy/PLA compounds
Ingridy Dayane dos Santos Silva,Janetty Jany Pereira Barros,Nichollas Guimarães Jaques,Renate Maria Ramos Wellen,Renate Maria Ramos Wellen +4 more
TL;DR: Non-isothermal curing kinetics of DGEBA/PLA/MTHPA compounds was modeled using Ozawa, Kissinger, Friedman autocatalytic, Friedman and Malek models, whose parameters and associate deviation are reported.
References
More filters
Journal ArticleDOI
Kinetic Parameters from Thermogravimetric Data
A. W. Coats,J. P. Redfern +1 more
TL;DR: In this article, a thermocouple is used to measure the sample temperature in a Stanton HT-D thermobalance, the bead of which is positioned in or near the sample, depending on crucible design.
Journal ArticleDOI
Empirical formula for the exponential integral in non-isothermal kinetics
TL;DR: The exponential integral of the exponential integral can be approximated by means of the empirical formula, e.g. as mentioned in this paper, which approximates p(x) = - \int\limits_\infty ^x {\frac{{e^{ - u} }}{{u^2 }}} \cdot du\).
Journal ArticleDOI
Reaction kinetics and differential thermal analysis
Ralph T. Yang,Meyer Steinberg +1 more
TL;DR: In this paper, the relationship between chemical kinetics and differential thermal analysis (DTA) curves is studied for the reactions which follow the general rate expression: r = r/sub 0/e/sup -E/RT/(1 - x).