Model-free and model-fitting approaches to kinetic analysis of isothermal and nonisothermal data

▪ Abstract The kinetics of solid state reactions generally cannot be assumed to follow simple rate laws that are applicable to gas-phase reactions. Nevertheless, a widely practiced method for extracting Arrhenius parameters from thermal analysis experiments involves force fitting of experimental data to simple reaction-order kinetic models. This method can produce significant errors in predicted rates outside the experimental range of temperatures, and it is of limited utility for drawing mechanistic conclusions about reactions. In this review, we discuss how an alternative “model-free” approach to kinetic analysis, which is based on the isoconversional method, can overcome some of these limitations.

Kinetics in solids

This article is an up-to-date review of the literature available on the subject of ethanol to ethylene. The process of ethanol to ethylene has broad development prospects. Compared with the process of petroleum to ethylene, ethanol dehydration to ethylene is economically feasible. Researchers have been redirecting their interest to the ethylene production process, catalysts, and reaction mechanisms. A fluidized bed reactor, together with a wear-resistant, efficient, and stable catalyst will be the focus of future research that includes a deep understanding of the large-scale activated alumina catalyst and the molecular sieve catalyst used, and will promote the development of the ethanol dehydration to ethylene process and provide strong support for the market competiveness of the process.

Dehydration of Ethanol to Ethylene

X-ray photoelectron spectroscopic studies of cadmium- and silver-oxygen surfaces

Synthesis of CuO nanorods and their catalytic activity in the thermal decomposition of ammonium perchlorate

Active surface centres in a heterogeneous CdO catalyst for ethanol decomposition

Kinetic analysis of non-isothermal decomposition of Fe2+, Co2+, Ni2+ and Cu2+ succinate complexes in a nitrogen atmosphere

Thermal decomposition of KClO4 catalyzed by MnO2-CuO mixed oxides systems

Electrical conductivity and thermogravimetric studies of the thermal decomposition of doped cobalt carbonate

As catalysts for selective oxidation, molybdenum trioxide catalysts—prepared by two different methods—have been investigated. The results of vapor-phase oxidation of methanol are discussed on the basis of the acidic property, oxidizing functions, and the crystallographic structure of the catalysts. It was found that the acidic property is not the sole factor deciding the catalytic activity. Electrical conductivity measurements proved that molecular oxygen in the gas feed is necessary for maintaining the catalysts active. The difference in the catalytic activity and selectivity were reasonably interpreted in view of the structure sensitivity of those catalysts. A redox mechanism is also discussed in this paper.

K. M. Abd El-Salaam

Papers

Active surface centres in a heterogeneous CdO catalyst for ethanol decomposition

Kinetic analysis of non-isothermal decomposition of Fe2+, Co2+, Ni2+ and Cu2+ succinate complexes in a nitrogen atmosphere

Thermal decomposition of KClO4 catalyzed by MnO2-CuO mixed oxides systems

Electrical conductivity and thermogravimetric studies of the thermal decomposition of doped cobalt carbonate

Role of the Structural and Electronic Properties of Molybdenum Trioxide Catalysts on the Structure-Sensitive Oxidation of Methanol to Formaldehyde