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Acta Mathematica Hungarica
Authors: Carlo Alberto Mantica and Luca Guido Molinari

. and Rund , H. , Tensors, differential forms and variational principles , reprint Dover Ed. ( 1988 ). [24] Mantica , C. A. Molinari , L. G. 2011

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O vsienko , V. , Deformations of Modules of Differential Forms , J. Nonlinear Math Phys ., 10:2 ( 2003 ), 148 – 156 , DOI: 10.2991/jnmp.2003.10.2.3. [2] B asdouri

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Differential form is given by: 9 The average of activation energy ( E ) calculated through Friedman equation and Kissinger equation was 156.12 kJ mol −1 , and the average of lg A -value was 5.61 s −1 . Therefore, the thermal decomposition of magnesite

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conducting ideas of the kinetic analysis strategy. This will be applied to the first process. At a constant conversion, the differential form of the reaction rate can be written: where α is the conversion degree, β is the heating rate, T is

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) Friedman’s differential isoconversional method [ 7 ] The generally accepted differential form of the reaction rate under non-isothermal conditions and constant conversion is: 1 where β is the heating rate, T is the reaction temperature, and

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isoconversional variant were the two conducting ideas of the kinetic analysis strategy. This will be applied to the first process, i.e., to the dehydration. At a constant conversion the differential form of the reaction rate can be written: 1 where α

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) Differential form of kinetic mechanism function G ( α ) Integral form of the kinetic mechanism function n

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derive the underlying reaction mechanism. These methods state that the reaction rate at a constant extent of conversion is only a function of the temperature [ 30 ]. Equation 1 is the differential form of Friedman and Eqs. 2 and 3 are the basic

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form g (α) = [1 − (1 − α) 1/3 ] 2 and differential form (3/2)(1 − α ) 2/3 [1 − (1 − α ) 1/3 ] −1 . Figure 5 shows the fitted curve for linear regression of the DTG kinetic data for a single step degradation of C6 and C8, which invokes 3D diffusion

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Journal of Thermal Analysis and Calorimetry
Authors: Nopsiri Chaiyo, Rangson Muanghlua, Surasak Niemcharoen, Banjong Boonchom, Panpailin Seeharaj, and Naratip Vittayakorn

differential form f ( α ) = 2(1 – α ) 1/2 . Fig. 4 TGA curves of thermal Na 2 C 2 O 4 decomposition at four heating rates under an N 2 atmosphere Table 1

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