Authors:Dumitru Oancea, Valentin Munteanu, Domnina Razus, and Maria Mitu
temperatures, for the stoichiometric propane/air mixture occurring in isothermal conditions on platinum wire. The results are rationalized on the basis of a simple kineticmodel implying the multiplication of the surface active intermediates and resulting in a
Authors:Jo-Ming Tseng, Tung-Feng Hsieh, Yi-Ming Chang, Ya-Chen Yang, Lu-Yen Chen, and Chun-Ping Lin
of non-isothermal and isothermal kineticmodels simulations led to a beneficial kineticmodel of thermal decomposition to predict the thermal hazard of LOPs. The chosen approach was to establish an effective model of the thermal decomposition that
Authors:Hanieh Nassiri, Hassan Arabi, and Shokoufeh Hakim
types of active sites on the catalyst surface permits effective kineticmodeling for a given set of operating conditions.
Olefin polymerization kinetics has been investigated for a wide variety of polymerization systems, but in most cases, the
Authors:Bijan Barghi, Moslem Fattahi, and Farhad Khorasheh
also more subject to steric hindrance compared with water [ 28 ]. These effects resulted in the optimum amount of water being higher than that for methanol.
A kineticmodel describing PDH and catalyst deactivation
Authors:Seung-Ho Kwack, Myung-June Park, Jong Wook Bae, Kyoung-Su Ha, and Ki-Won Jun
temperature than iron-based catalysts [ 7 ]. Co-based FTS is further favored since the reaction is little affected by water [ 8 – 10 ].
The development of a kineticmodel of FTS is important for the simulation, design, and optimization of commercial FT
Authors:J. Fermoso, B. Arias, C. Pevida, M. Plaza, F. Rubiera, and J. Pis
The reactivity in steam of five different types of solid fuels (two coals, two types of biomass and a petcoke) has been studied.
The fuel chars were obtained by pyrolysis in a fixed-bed reactor at a temperature of 1373 K for 30 min. The gasification tests
were carried out by thermogravimetric analysis (TG) at different temperatures and steam concentrations. The reactivity study
was conducted in the kinetically controlled regime and three representative gas-solid models, volumetric model (VM), grain
model (GM) and random pore model (RPM), were applied in order to describe the reactive behaviour of the chars during steam
The kinetic parameters of these models were derived and the ability of the models to predict conversion and char reactivity
during gasification was assessed. The best model for describing the behaviour of the samples was the RPM. The effect of the
partial pressure of steam in gasification was studied, and the reaction order with respect to steam was determined. The reactivity
of the chars was compared by means of a reactivity index. Biomass exhibited a higher reactivity than coals and petcoke. However,
significant differences in reactivity were observed between the two types of biomass used, which could be due to catalytic
The kinetic of the reaction ilmenite with sulphuric acid was studied using non-adiabatic and non-isothermic calorimetric device
system. The kinetic model based on interphase surface and kinetic models found in literature which are usually applied were
The best agreement between experimental and calculated values was found with model based on first order of reaction and model
of contracting volume.
Authors:A. Jiménez, A. Iannoni, L. Torre, and J. Kenny
Thermogravimetric analysis (TG) was used in this work to study the degradation kinetics of industrial PVC plastisols. In order
to model the pyrolitic degradation of plastisols in nitrogen, a kinetic model based on phenomenological considerations was
developed. Two different processes were observed during the first degradation stage. The model parameters, such as activation
energies and pseudo orders of reaction, were calculated using a non-linear regression analysis. The model developed was able
to describe the degradation behaviour both in isothermal and in dynamic modes. The results of such analysis were applied to
obtain long-term data from short-term experiments as an engineering approach to evaluate the thermal resistance of plastisols.
Authors:A. Santos, L. Polese, M. Crespi, and C. Ribeiro
The non-isothermal data given by TG curves for poly(3-hydroxybutyrate) (PHB) were studied in order to obtain a consistent
kinetic model that better represents the PHB thermal decomposition. Thus, data obtained from the dynamic TG curves were suitably
managed in order to obtain the Arrhenius kinetic parameter E according to the isoconversional F-W-O method. Once the E parameters is found, a suitable logA and kinetic model (f(α)) could be calculated. Hence, the kinetic triplet (E±SD, logA±SD and f(α)) obtained for the thermal decomposition of PHB under non-isothermal conditions was E=152±4 kJ mol−1, logA=14.1±0.2 s−1 for the kinetic model, and the autocatalytic model function was: f(α)=αm(1−α)n=α0.42(1−α)0.56.
Authors:Chun-Ping Lin, Yi-Ming Chang, Jo-Ming Tseng, and Chi-Min Shu
Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX) is a typical highly energetic material that has been widely used in
national defense industries since the 1940s. The aim of this study was to establish a reaction kinetic model on thermal decomposition
properties via differential scanning calorimetry (DSC) by well-known kinetic equations and kinetic model simulation. Furthermore,
the aim also was to compare kinetic algorithms for thermal decomposition energy parameters under various conditions. Experimental
results highly depended on the reliability of the kinetic concept applied, which is essentially defined by the proper choice
of a mathematical model of a reaction. In addition, the correctness of the methods is used for kinetics evaluation.