Size-dependent thermal decomposition and kinetics of ultrafine alkali metal styphnates

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39463-39471 ◽  
Author(s):  
Rui Liu ◽  
Wenyuan Zhao ◽  
Tonglai Zhang ◽  
Li Yang ◽  
Zunning Zhou ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Alkali Metal ◽  
Decomposition Temperature ◽  
Size Dependent ◽  
Kinetics Of

The styphnate of smaller size possesses lower decomposition temperature and higher reactivity.

Thermal Decomposition Kinetics of PLLA/Talc/TBC Composites

2012 ◽  
Vol 262 ◽  
pp. 572-576
Author(s):  
Kai Guo ◽  
Xiao Qing Shen ◽  
Yuan Yuan Zhan ◽  
Jin Zhou Chen ◽  
Ming Jun Niu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Mass Loss ◽  
Decomposition Temperature ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Thermal Decomposition Temperature ◽  
Initial Stage ◽  
Apparent Activation Energies ◽  
Kinetics Of ◽  
Derivative Thermogravimetry

To enhance the crystallizability and flexibility, Poly L-lactide (PLLA)/ Talc/ tributyl citrate(TBC) composites were prepared via melt extrusion and investigated by thermogravimetry (TG) and derivative thermogravimetry (DTG). It was shown that the thermal decomposition temperature of PLLA/Talc (97:3) and of PLLA/Talc/TbC (96:3:1) had increased 7.6 oC and 16.2 oC respetively compared with pure PLLA. The thermal decomposition kinetics of pure PLLA and composites were studied by using the Ozawa–Flynn–Wall (OFW) and the Friedman methods respectively, the results indicated that the apparent activation energies of PLLA/Talc/TBC composites increased sharply in the initial stage of the mass loss.

Heat Resistance Properties of an Cured ATPU/Epoxy Resin

2014 ◽  
Vol 1058 ◽  
pp. 127-131
Author(s):  
Wen Yi Chen ◽  
Jian Guo Guan
Keyword(s):  
Thermal Decomposition ◽  
Heat Resistance ◽  
Epoxy Resin ◽  
Decomposition Reaction ◽  
Decomposition Temperature ◽  
Decomposition Kinetics ◽  
Resin System ◽  
Structural Units ◽  
Epoxy Resin System ◽  
Kinetics Of

Thermogravimetry (TG-DTA) method was used to study the heat resistance properties and the thermal decomposition kinetics of the aromatic amine-terminated polyurethane (ATPU)/Epoxy Resin System (E-44) which includes both flexible chains and rigid structural units. The results indicate that the decomposition temperature of the cured ATPU-2/E-44 is higher than that of the cured ATPU-1.5/E-44, and thermal decomposition residual of cured ATPU-2/E-44 is higher than that of cured ATPU-1.5/E-44 system. These results denote that the cured ATPU-2/E-44 has better heat resistance. The results of decomposition kinetics showed that the decomposition reaction activity of the ATPU-2/E-44 system is higher than that of ATPU-1.5/E-44.

Thermochemistry and reactivity of the azides - III. Thermal decomposition of silver azide and its sensitization by artificial lattice defects

1957 ◽  
Vol 241 (1224) ◽  
pp. 110-121 ◽  
Keyword(s):  
Thermal Decomposition ◽  
Alkali Metal ◽  
Physical Properties ◽  
Crystal Lattice ◽  
Rate Equation ◽  
Energy Of Activation ◽  
Silver Azide ◽  
Crystal Lattices ◽  
Lower Temperature ◽  
Kinetics Of

The kinetics of the thermal decomposition of silver azide have been studied and the results found to fit a rate equation d(N 2 )/d t = k (AgN 3 ) 2/3 . The energy of activation of the decom­position has been found. The decomposition has been sensitized by the incorporation of cyanamide ion into the crystal lattice. The sensitized azide was found to explode at a much lower temperature than the unsensitized azide. At temperatures too low for explosion it decomposes at a much greater rate, though the kinetics are unchanged and no significant change has been found in the energy of activation. A mechanism for the reaction is put forward and the great difference between the behaviour of silver and thallium azides and that of the alkali-metal azides explained in terms of the physical properties of the crystal lattices. A theoretical calculation of the activation energies for the decomposition of the azides is made.

Kinetics of Thermal Decomposition of Lime Stone

1967 ◽  
Vol 53 (7) ◽  
pp. 740-743 ◽  
Author(s):  
Kiyoshi SAWAMURA ◽  
Kazuichi MIZOGUCHI ◽  
Tetsuro HANADA ◽  
Kunihiko MAKINO
Keyword(s):  
Thermal Decomposition ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of ◽  
Lime Stone

Thermal Decomposition Kinetics of Torrefied Oil Palm Empty Fruit Bunch Briquettes

2016 ◽  
Vol 10 (3) ◽  
pp. 325-328 ◽  
Author(s):  
Bemgba Nyakuma ◽  
◽  
Arshad Ahmad ◽  
Anwar Johari ◽  
Tuan Abdullah ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Oil Palm ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Kinetic Properties ◽  
Tg Analysis ◽  
Empty Fruit Bunches ◽  
Thermal Lag ◽  
Profile Characteristics ◽  
Kinetics Of

The study is aimed at investigating the thermal behavior and decomposition kinetics of torrefied oil palm empty fruit bunches (OPEFB) briquettes using a thermogravimetric (TG) analysis and the Coats-Redfern model. The results revealed that thermal decomposition kinetics of OPEFB and torrefied OPEFB briquettes is significantly influenced by the severity of torrefaction temperature. Furthermore, the temperature profile characteristics; Tonset, Tpeak, and Tend increased consistently due to the thermal lag observed during TG analysis. In addition, the torrefied OPEFB briquettes were observed to possess superior thermal and kinetic properties over the untorrefied OPEFB briquettes. It can be inferred that torrefaction improves the fuel properties of pelletized OPEFB for potential utilization in bioenergy conversion systems.

Thermal Decomposition Kinetics of Glyphosate (GP) and its Metabolite Aminomethylphosphonic Acid (AMPA)

2019 ◽  
Author(s):  
Milad Narimani ◽  
Gabriel da Silva
Keyword(s):  
Thermal Decomposition ◽  
Reaction Rate ◽  
Decomposition Kinetics ◽  
Rate Theory ◽  
Thermal Decomposition Mechanism ◽  
Treatment Processes ◽  
Aminomethylphosphonic Acid ◽  
Reaction Rate Theory ◽  
Decomposition Chemistry ◽  
Kinetics Of

Glyphosate (GP) is a widely used herbicide worldwide, yet accumulation of GP and its main byproduct, aminomethylphosphonic acid (AMPA), in soil and water has raised concerns about its potential effects to human health. Thermal treatment processes are one option for decontaminating material containing GP and AMPA, yet the thermal decomposition chemistry of these compounds remains poorly understood. Here, we have revealed the thermal decomposition mechanism of GP and AMPA by applying computational chemistry and reaction rate theory methods. <br>

The Reactivity of Different Active Forms of Sodium Carbonate with Respect to Sulfur Dioxide

1992 ◽  
Vol 57 (11) ◽  
pp. 2302-2308
Author(s):  
Karel Mocek ◽  
Erich Lippert ◽  
Emerich Erdös
Keyword(s):  
Thermal Decomposition ◽  
Liquid Phase ◽  
Sulfur Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Sodium Carbonate ◽  
Room Temperature ◽  
Active Form ◽  
The Other ◽  
Kinetics Of

The kinetics of the reaction of solid sodium carbonate with sulfur dioxide depends on the microstructure of the solid, which in turn is affected by the way and conditions of its preparation. The active form, analogous to that obtained by thermal decomposition of NaHCO3, emerges from the dehydration of Na2CO3 . 10 H2O in a vacuum or its weathering in air at room temperature. The two active forms are porous and have approximately the same specific surface area. Partial hydration of the active Na2CO3 in air at room temperature followed by thermal dehydration does not bring about a significant decrease in reactivity. On the other hand, if the preparation of anhydrous Na2CO3 involves, partly or completely, the liquid phase, the reactivity of the product is substantially lower.

Sign in / Sign up

Export Citation Format

Share Document