Nonisothermal reaction kinetics of diasporic bauxite

Li, Haoqun; Shao, Tianmin; Li, Desheng; Chen, Darong

doi:10.1016/j.tca.2004.08.016

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…The values of α m and α p ∞ corresponding to the maxima of both y (α) and z (α) curves were summarized in Table . It is evident that the values of these important parameters conform to the SB( m , n ) model, − which is known as f ( α ) = α m ( 1 − α ) n …”

Section: Resultsmentioning

confidence: 99%

“…The following eq was used for kinetic analysis of solid-state decompositions d α d t = A exp true( − E normala R T true) f ( α ) where t is the time.…”

Section: Resultsmentioning

confidence: 99%

“…Once the activation energy has been determined, the Malek method − was used to find the most probable kinetic model which best described the measure set of TG data. Two special functions y (α) and z (α) were defined and expressed as follows y ( α ) = true( normald normalα normald t true) e x = A f ( α ) z ( α ) = π ( x ) true( normald normalα normald t true) T β where x = E a / RT and π( x ) is an approximation of the temperature integral.…”

Section: Resultsmentioning

confidence: 99%

“…Once the activation energy has been determined, the Malek method [25][26][27][28] was used to find the most probable kinetic model which best described the measure set of TG data. Two special functions y(R) and z(R) were defined and expressed as follows…”

Section: R )mentioning

confidence: 99%

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Heat Capacities and Nonisothermal Thermal Decomposition Reaction Kinetics of d-Mannitol

et al. 2009

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The low-temperature heat capacity C p,m of d-mannitol was measured in the temperature range from (80 to 390) K by means of a fully automated adiabatic calorimeter. The dependence of heat capacity on the temperature was fitted to a polynomial equation with the least-squares method. The thermodynamic functions (H T − H 298.15 K) and (S T − S 298.15 K) were derived from the heat capacity data in the temperature range of (80 to 390) K with an interval of 5 K. The melting temperature, molar enthalpy, and entropy of fusion were determined to be (437.25 ± 0.12) K, (54.69 ± 1.64) kJ·mol−1, and (125.08 ± 3.75) J·K−1·mol−1 by DSC measurements. The thermal stability and nonisothermal thermal decomposition kinetics of the compound were studied by the TG-DTG technique under atmospheric pressure and flowing nitrogen gas conditions. The thermal decomposition process had one mass loss stage, and the apparent activation energy E a was obtained to be (120.61 ± 1.85) kJ·mol−1 by the Kissinger, Friedman, and Flynn−Wall−Ozawa methods. The Malek method was used to identify the most probable kinetic model SB(m, n). The kinetics model function and the pre-exponential factor A were expressed to be: f(α) = α0.306(1 − α)0.381; ln A = 17.88, respectively.

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Section: Resultsmentioning

confidence: 99%

“…The following eq was used for kinetic analysis of solid-state decompositions d α d t = A exp true( − E normala R T true) f ( α ) where t is the time.…”

Section: Resultsmentioning

confidence: 99%