Investigation of the Kinetic Regularities of the Interaction of Petroleum Coke with Phosphogypsum to Calcium Sulfide

2021 ◽  
Vol 625 (3) ◽  
pp. 32-35
Author(s):  
A. V. Suslikov ◽  
◽  
B. S. Zhirnov ◽  
F. R. Murtazin ◽  
◽  
...  

This study describes the research results of petroleum coke (carbon) and phosphogypsum reaction and the methods used for the above. Stoichiometric petroleum coke and phosphogypsum mixtures were prepared for the study. The coke was cut and screened with particle size distribution of 0.25-0.315 mm and dried at 110 °С temperature. The phosphogypsum sample was also cut and screened with the same particle size and was pre-heated within the 100-200 °С range up to permanent mass. The weighed samples were heated within 900 till 1000 °С, the range being typical to one of reaction stages between coke and phosphogypsum, i.e. the decomposition reaction with the products of calcium sulfide and carbon dioxide. The extend and rate of samples conversion and their time correlations were obtained for the number of reaction temperatures. Reaction rate constant and activating energy were calculated based on this correlations results.

Fuel ◽  
2011 ◽  
Vol 90 (9) ◽  
pp. 2896-2901 ◽  
Author(s):  
Qihui He ◽  
Rui Wang ◽  
Weiwei Wang ◽  
Renfu Xu ◽  
Baixing Hu

2020 ◽  
Vol 69 (4) ◽  
pp. 102-106
Author(s):  
Shota Ohki ◽  
Shingo Mineta ◽  
Mamoru Mizunuma ◽  
Soichi Oka ◽  
Masayuki Tsuda

1995 ◽  
Vol 5 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Christine M. Woodall ◽  
James E. Peters ◽  
Richard O. Buckius

1998 ◽  
Vol 84 (5) ◽  
pp. 387-392 ◽  
Author(s):  
Takashi INOUE ◽  
Yuzo HOSOI ◽  
Koe NAKAJIMA ◽  
Hiroyuki TAKENAKA ◽  
Tomonori HANYUDA

2020 ◽  
Vol 86 (1) ◽  
pp. 32-37
Author(s):  
Valeria A. Brodskaya ◽  
Oksana A. Molkova ◽  
Kira B. Zhogova ◽  
Inga V. Astakhova

Powder materials are widely used in the manufacture of electrochemical elements of thermal chemical sources of current. Electrochemical behavior of the powders depends on the shape and size of their particles. The results of the study of the microstructure and particles of the powders of vanadium (III), (V) oxides and lithium aluminate obtained by transmission electron and atomic force microscopy, X-ray diffraction and gas adsorption analyses are presented. It is found that the sizes of vanadium (III) and vanadium (V) oxide particles range within 70 – 600 and 40 – 350 nm, respectively. The size of the coherent-scattering regions of the vanadium oxide particles lies in the lower range limit which can be attributed to small size of the structural elements (crystallites). An average volumetric-surface diameter calculated on the basis of the surface specific area is close to the upper range limit which can be explained by the partial agglomeration of the powder particles. Unlike the vanadium oxide particles, the range of the particle size distribution of the lithium aluminate powder is narrower — 50 – 110 nm. The values of crystallite sizes are close to the maximum of the particle size distribution. Microstructural analysis showed that the particles in the samples of vanadium oxides have a rounded (V2O3) or elongated (V2O5) shape; whereas the particles of lithium aluminate powder exhibit lamellar structure. At the same time, for different batches of the same material, the particle size distribution is similar, which indicates the reproducibility of the technologies for their manufacture. The data obtained can be used to control the constancy of the particle size distribution of powder materials.


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