Thermal decomposition, pore structure and heats of immersion of zirconia gel

1977 ◽  
Vol 27 (1) ◽  
pp. 58-66
Author(s):  
Suzy A. Selim ◽  
Taghreed M. El-Akkad
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Heats Of Immersion

Pore structure of pyrolyzed scrap tires

2008 ◽  
Vol 62 (1) ◽  
Author(s):  
Zuzana Koreňová ◽  
Juma Haydary ◽  
Július Annus ◽  
Jozef Markoš ◽  
L’udovít Jelemenský
Keyword(s):  
Thermal Decomposition ◽  
Carbon Black ◽  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Nitrogen Flow ◽  
Solid Matter ◽  
Scrap Tires ◽  
Different Temperatures

AbstractInternal structure of carbon black produced by pyrolysis (CBp) of rubber samples from the top and bottom parts of sidewall and tread of a passenger car tire was investigated in nitrogen flow at different temperatures. The pore structure (specific surface area, pore size distribution, and porosity) of CBp and commercial CB, was compared. The development of pore structure and the increase of the specific surface area were most intensive during the thermal decomposition at temperatures ranging from 300°C to 500°C. This is caused by the intensive release of volatiles during the pyrolysis. After the pyrolysis was finished, at temperatures above 500°C, further decomposition of solid matter was associated with a slight increase of the specific surface area.

Thermal decomposition and pore structure of pure and doped stannic oxide gel

2007 ◽  
Vol 26 (1) ◽  
pp. 191-198 ◽  
Author(s):  
Raouf S. H. Mikhail ◽  
Suzy A. Selim ◽  
Farouk I. Zeidan
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Stannic Oxide

scholarly journals A Multifaceted Kinetic Model for the Thermal Decomposition of Calcium Carbonate

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 849
Author(s):  
Jingxue Zheng ◽  
Junchen Huang ◽  
Lin Tao ◽  
Zhi Li ◽  
Qi Wang
Keyword(s):  
Thermal Decomposition ◽  
Calcium Carbonate ◽  
Pore Structure ◽  
Kinetic Models ◽  
Decomposition Reaction ◽  
Main Body ◽  
Structure Model ◽  
Thermal Decomposition Process ◽  
Proposed Model ◽  
Improved Model

The existing kinetic models often consider the influence of a single factor alone on the chemical reaction and this is insufficient to completely describe the decomposition reaction of solids. Therefore, the existing kinetic models were improved using the pore structure model. The proposed model was verified using the thermal decomposition experiment on calcium carbonate. The equation has been modified as fα=n1−α1−1n−ln1−α−1m1−ψln1−α12. This led to the conclusion that the pore structure, generated during the thermal decomposition of calcite, has an important influence on the decomposition kinetics. The existing experimental data show that the improved model, with random pores as the main body, reasonably describes the thermal decomposition process of calcite.

Pore structure and kinetics of the thermal decomposition of Al(OH)3

AIChE Journal ◽  
1986 ◽  
Vol 32 (9) ◽  
pp. 1532-1545 ◽  
Author(s):  
Lawrence Candela ◽  
D. D. Perlmutter
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Kinetics Of

Thermal decomposition and pore structure of pure and doped stannic oxide gel

1976 ◽  
Vol 26 (4) ◽  
pp. 191-198 ◽  
Author(s):  
Raouf Sh. Mikhail ◽  
Suzy A. Selim ◽  
Farouk I. Zeidan
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Stannic Oxide

scholarly journals Fabrication Of Porous Ti By Thermal Decomposition And Sintering Of PMMA/TiH2 Powder Compact

2015 ◽  
Vol 60 (2) ◽  
pp. 1375-1377 ◽  
Author(s):  
K.Ch. Jeon ◽  
Y.D. Kim ◽  
M.-J. Suk ◽  
S.-T. Oh
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Powder Compact ◽  
Sintering Process ◽  
Microstructure Observation ◽  
Porous Ti ◽  
Tih2 Powder ◽  
Powder Compacts ◽  
Pmma Beads ◽  
Tga Analysis

Abstract Porous Ti with controlled pore structure was fabricated by thermal decomposition and sintering process using TiH2 powders and Polymethylmethacrylates (PMMA) beads as pore forming agent. The beads sizes of 8 and 50 μm were used as a template for fabricating the porous Ti. The TiH2 powder compacts with 20 and 70 vol% PMMA were prepared by uniaxial pressing and sintered for 2 h at 1100°C. TGA analysis revealed that the PMMA and TiH2 were thermally decomposed at about 400°C forming pores and at about 600°C into metallic Ti phase. The porosity increased with increase in the amount of PMMA addition. Also, the microstructure observation showed that the pore size and shape were strongly dependent on the PMMA shapes.

Porous Cr2O3 bead with a 3D continuous pore architecture: synthesis and its catalytic performance for decomposition of ammonium perchlorate

2019 ◽  
Vol 43 (26) ◽  
pp. 10560-10566 ◽  
Author(s):  
Dakang Wang ◽  
Yanqiu Jiang ◽  
Yinghui Hu ◽  
Dongyu Hao ◽  
Yulin Yang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Pore Structure ◽  
Ammonium Perchlorate ◽  
Catalytic Performance ◽  
Pore Architecture

Mesoporous/macroporous Cr2O3 beads with 3D continuous pore structure exhibit improved thermal decomposition of ammonium perchlorate compared with Cr2O3 crystals.

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