Most of the kinetic studies in the gas-solid reactions field aim to extract the model of transformation (f(α)) and the kinetic constants (A, Ea) from the analysis of the experimental data according to: dα/dt = A exp(-Ea/RT) f(α) Many articles have already been devoted to the discussion of mathematical methods and these will not be discussed here. I...
Published in Frontiers of Chemical Science and Engineering
In this paper, a new kinetic model for methanol to olefin process over SAPO-34 catalyst was developed using elementary step level. The kinetic model fits well to the experimental data obtained in a fixed bed reactor. Using this kinetic model, the effect of the most important operating conditions such as temperature, pressure and methanol space-time...
The kinetic modeling of chemical reactions in gas-solid systems necessitates a mathematical expression of the rate as a function of variables. For a long time the rate equations used for transformations of powders were different from those describing the oxidation of a metal or an alloy. Both approaches and a unified theory that intends to cover an...
Published in National Science Review
Alkaline hydrogen evolution reaction (HER), consisting of Volmer and Heyrovsky/Tafel steps, requires extra energy for water dissociation, leading to more sluggish kinetics than acidic HER. Despite the advances in electrocatalysts, how to combine active sites to synergistically promote both steps and understand the underlying mechanism remain largel...
Published in Kinetics and Catalysis
AbstractThe validity of using kinetic scheme reduction procedures to compare various kinetic models as well as the values of kinetic parameters of individual steps present in the literature is analyzed. The peculiarities of the development of the gas-phase reaction block as a part of the heterogeneous-homogeneous model of the oxidative coupling of ...
