Cai, J. M. Liu, R. H.
Published in
Journal of Thermal Analysis and Calorimetry
This paper describes the influences of some parameters relevant to biomass pyrolysis on the numerical solutions of the nonisothermal nth-order distributed activation energy model (DAEM) involved the Weibull distribution. Investigated parameters are the integral upper limit, the frequency factor, heating rate, the reaction order and the shape, scale...
Cadenato, A. Morancho, J. M. Fernández-Francos, X. Salla, J. M. Ramis, X.
Published in
Journal of Thermal Analysis and Calorimetry
The thermal polymerization kinetics of dimethacrylate monomers was studied by differential calorimetry using non-isothermal experiments. The kinetic analysis compared the following procedures: isoconversional method (model-free method), reduced master curves, the isokinetic relationship (IKR), the invariant kinetic parameters (IKP) method, the Coat...
Wang, Dunjia Fang, Zhengdong Lu, Lianying
Published in
Journal of Wuhan University of Technology-Mater. Sci. Ed.
The polyoxometalate (CPFX·HCl)3H3PW12O40·8H2O was prepared and characterized by elemental analysis, IR spectra and TG-DTA-DTG. The thermal decomposition mechanism and non-isothermal kinetic parameters of the polyoxometalate were obtained from the analysis of TG-DTG data using the Achar equation, Coats-Redfern equation (CR), Madhusudanan-Krishnan-Ni...
Budrugeac, P. Segal, E.
Published in
Journal of Thermal Analysis and Calorimetry
For the most common kinetic models used in heterogeneous reactions, the dependencies on xm = E/RTm (E is the activation energy, Tm is the temperature corresponding to maximum process rate, R is the gas constant) on the relative errors (e%) in the determination of the activation energy from the slope of the Kissinger straight line ln(β / Tm2) vs. 1/...
Vlase, T. Vlase, Gabriela Birta, Nicoleta Doca, N.
Published in
Journal of Thermal Analysis and Calorimetry
A comparative kinetic analysis on the thermal decomposition of tartaric acid and potassium tartrate under non-isothermal conditions was performed. The non-isothermal kinetic parameters were determined by the following four methods: integral isoconversional method suggested by Flynn-Wall-Ozawa (FWO method); differential isoconversional method sugges...
Vlase, T. Pǎcurariu, C. Lazǎu, R. I. Lazǎn, I.
Published in
Journal of Thermal Analysis and Calorimetry
The crystallization kinetic of the basalt glass ceramic of the oxide composition, (%): SiO2 − 50.82; Al2O3 − 12.05; Fe2O3 − 9.28; CaO − 15.48; MgO − 11.08; Na2O+K2O − 1.14; TiO2 − 0.15, with addition of 10% TiO2 as nucleating agent has been studied using thermal analysis under non-isothermal conditions. In this order, the non-isothermal DTA curves ...
Feher, Loredana Jurconi, B. Vlase, Gabriela Vlase, T. Doca, N.
Published in
Journal of Thermal Analysis and Calorimetry
The thermooxidative degradation of three models of oily soils was studied under non-isothermal conditions, at heating rates of 5, 10, 15 and 20°C min−1. Di-octyl-sebacate, as model for synthetic oil, was adsorbed on silica, alumina and silico-alumina, considered models for the inorganic micelle of a soil. For a kinetic analysis, the TG data were pr...
Vlase, Gabriela Vlase, T. Tudose, Ramona Costişor, Otilia Doca, N.
Published in
Journal of Thermal Analysis and Calorimetry
Kinetics of thermal decomposition of three structurally similar complexes Co2Cu(C2O4)3 (R-diam)2, where R is ethyl, 1,2-propyl or 1,3-propyl, was studied under non-isothermal conditions and nitrogen dynamic atmosphere at heating rates of 5, 7, 10, 12 and 15 K min−1. For data processing the Flynn-Wall-Ozawa and a modified non-parametric kinetic meth...
Vlase, T. Vlase, Gabriela Modra, Dorina Doca, N.
Published in
Journal of Thermal Analysis and Calorimetry
Thermal behavior of four food dyes, i.e. tartrazine, crysoine, azorubine and amarant was studied under non-isothermal conditions, in dynamic air atmosphere and at heating rates of 5, 10, 15 and 20°C min–1. The TG data were correlated to the FTIR spectra of each sample, before and after the thermal decomposition. Kinetic study by processing the TG d...
Ioiţescu, Alexandra Vlase, Gabriela Vlase, T. Doca, N.
Published in
Journal of Thermal Analysis and Calorimetry
The kinetics of thermal decomposition of Ca(H2PO4)2·H2O under non-isothermal conditions was studied. The TG/DTG curves were obtained at five heating rates: 5, 7, 10, 12 and 20 K min–1. The kinetic analysis was performed by means of three methods: Friedman, Budrugeac–Segal and NPK by Sempere and Nomen. An important dependence of the activation energ...
