Experimental approach to the determination of mechanism and kinetics of heterogeneous solid state reactionsA S →B S +C G

1984 ◽  
Vol 29 (5) ◽  
pp. 1013-1016 ◽  
Author(s):  
A. Reller ◽  
H. R. Oswald
Keyword(s):  
Solid State ◽  
Experimental Approach ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Heterogeneous Solid

Studies on the Behavior Some Paints in Electro-insulating Fluid Based on Vegetable Esters

2018 ◽  
Vol 69 (5) ◽  
pp. 1139-1144
Author(s):  
Iosif Lingvay ◽  
Adriana Mariana Bors ◽  
Livia Carmen Ungureanu ◽  
Valerica Stanoi ◽  
Traian Rus
Keyword(s):  
Structural Changes ◽  
Oxidation Processes ◽  
High Oleic ◽  
Painting Materials ◽  
Insulating Paper ◽  
Different Types ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Natural Ester

For the purpose of using three different types of painting materials for the inner protection of the transformer vats, their behavior was studied under actual conditions of operation in the transformer (thermal stress in electro-insulating fluid based on the natural ester in contact with copper for electro-technical use and electro-insulating paper). By comparing determination of the content in furans products (HPLC technique) and gases formed (by gas-chromatography) in the electro-insulating fluid (natural ester with high oleic content) thermally aged at 130 �C to 1000 hours in closed glass vessels, it have been found that the presence the investigated painting materials lead to a change in the mechanism and kinetics of the thermo-oxidation processes. These changes are supported by oxygen dissolved in oil, what leads to decrease both to gases formation CO2, CO, H2, CH4, C2H4 and C2H6) and furans products (5-HMF, 2-FOL, 2 -FAL and 2-ACF). The painting materials investigated during the heat treatment applied did not suffer any remarkable structural changes affecting their functionality in the electro-insulating fluid based on vegetable esters.

Kinetic analysis of solid-state processes

2001 ◽  
Vol 16 (6) ◽  
pp. 1862-1871 ◽  
Author(s):  
Jiří Málek ◽  
Takefumi Mitsuhashi ◽  
José Manuel Criado
Keyword(s):  
Solid State ◽  
Kinetic Analysis ◽  
Crystallization Process ◽  
Good Description ◽  
Simple Method ◽  
Solid State Kinetics ◽  
Kinetics Of ◽  
Nonisothermal Conditions ◽  
Two Parameter

A simple method for kinetic analysis of solid-state processes has been developed. A criteria capable of classifying different processes is explored here with a view toward visualizing the complexity of solid-state kinetics. They provide a useful tool for the determination of the most suitable kinetic model. The method has been applied to the analysis of crystallization processes in amorphous ZrO2 and RuO2. It is found that the crystallization kinetics of as-prepared sample exhibits a complex behavior under nonisothermal conditions. This is probably due to an overlapping of the nucleation- and crystal-growth processes at the beginning of crystallization. As a consequence, the Johnson–Mehl–Avrami nucleation-growth model cannot be applied. A two-parameter autocatalytic model provides a good description of the crystallization process under isothermal and nonisothermal conditions.

Mechanism and Kinetics of Lipid Bilayer Formation in Solid-State Nanopores

Langmuir ◽  
2020 ◽  
Vol 36 (6) ◽  
pp. 1446-1453 ◽  
Author(s):  
Shuangshuang Zeng ◽  
Shiyu Li ◽  
Johanna Utterström ◽  
Chenyu Wen ◽  
Robert Selegård ◽  
...  
Keyword(s):  
Solid State ◽  
Lipid Bilayer ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Bilayer Formation

On Problems of Determination of the Kinetics of Hydrogen Electroevolution Reaction

2015 ◽  
Vol 228 ◽  
pp. 333-343
Author(s):  
Bożena Łosiewicz ◽  
Magdalena Popczyk
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Electrode Materials ◽  
Review Paper ◽  
Electrochemical Impedance ◽  
Theoretical Background ◽  
Porous Electrodes ◽  
Detailed Mechanism ◽  
Mechanism And Kinetics ◽  
Kinetics Of

Knowledge of the mechanism and the kinetics of hydrogen evolution reaction (HER) is essential for tailoring new electrode materials with electrocatalytic activity towards HER. This review paper deals with some problems related to determination of the kinetics of multi-step reaction of HER, especially on porous electrodes. Theoretical background of HER has been briefly presented. The importance of electrochemical impedance spectroscopy (EIS) method for studies of the detailed mechanism and kinetics of HER and some problems in understanding of the interpretationacimpedance results, have been discussed.

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