Kinetics of high-temperature carbon gasification reaction

AIChE Journal ◽  
1982 ◽  
Vol 28 (2) ◽  
pp. 237-244 ◽  
Author(s):  
N. J. Desai ◽  
R. T. Yang
Keyword(s):  
High Temperature ◽  
Carbon Gasification ◽  
Gasification Reaction ◽  
Kinetics Of

Carbothermic Reduction of Zinc Ferrite by Microwave Heating

2013 ◽  
Vol 32 (5) ◽  
pp. 485-491 ◽  
Author(s):  
Xin Wang ◽  
Shao-Hua Ju ◽  
C. Srinivasakannan ◽  
Da-Jin Yang ◽  
Jin-Hui Peng
Keyword(s):  
Particle Size ◽  
Microwave Power ◽  
Carbothermic Reduction ◽  
Decomposition Temperature ◽  
Mechanism Of Formation ◽  
Carbon Gasification ◽  
Gasification Reaction ◽  
Kinetics Of ◽  
Hsc Chemistry ◽  
Equilibrium Calculations

AbstractThe kinetics of carbothermic reduction of ZnFe2O4 in the temperature range 823–1223 K, was investigated in a microwave reactor. The mechanism of formation of ZnO and Fe3O4/FeO by decomposition of ZnFe2O4 was explained using the equilibrium calculations and thermodynamics analysis using HSC chemistry software 6.0. In addition the effect of parameters such as the decomposition temperature, C/ZnFe2O4 ratio, particle size and microwave power were assessed on the decomposition kinetics. Zn recovery as high as 98.83% could be achieved at a decomposition temperature of 1023 K, C/ZnFe2O4 ratio of 1:3, particle size of +74–61 µm and microwave power of 1200 W. The kinetics of decomposition was found to be carbon gasification reaction controlled, with the activation energy of 39.21 kJ/mol.

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

High Temperature Oxidation Kinetics of Shot-Peened and Laser-Shock Peened Ti-Beta-21S

2021 ◽  
Author(s):  
V. Optasanu ◽  
M. C. Marco de Lucas ◽  
A. Kanjer ◽  
B. Vincent ◽  
T. Montesin ◽  
...  
Keyword(s):  
High Temperature ◽  
Oxidation Kinetics ◽  
High Temperature Oxidation ◽  
Laser Shock ◽  
Temperature Oxidation ◽  
Kinetics Of

Kinetics of Growth and Structure of Coatings Obtained on Sandelin Steels in the High-Temperature Galvanizing Process

2013 ◽  
Vol 212 ◽  
pp. 127-132 ◽  
Author(s):  
Henryk Kania
Keyword(s):  
High Temperature ◽  
Growth Kinetics ◽  
Structural Components ◽  
Compact Layer ◽  
Two Phase ◽  
Continuous Layer ◽  
Structure Of Coatings ◽  
Zinc Coatings ◽  
Kinetics Of ◽  
Diffuse Coating

In the paper the author presents the results of tests defining the characteristics of behaviour of Sandelin steel in the high-temperature galvanizing process. The growth kinetics of hot-dip zinc coatings on the substrate of 0.05% Si steel in the temperature range of 540-580°C has been established. The structure of the coatings and their phase composition have been developed and the chemical composition of structural components of the coating has be defined. It has been determined that the coating is composed of a compact layer δ1 and an area of a two-phase mixture of δ1 and Zn. The conducted tests confirmed the presence of phase Γ1 , which does not form a continuous layer but it forms individual precipitates which are irregular in shape. The growth kinetics of the coating indicates that an increase in temperature causes a decrease in the coating thickness, which might prove that dissolving processes prevailed over the processes of diffuse coating growth.

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