Kinetic study of the thermal decomposition of (Z)-N-tert-butyl-.alpha.-phenylnitrone

1974 ◽  
Vol 39 (23) ◽  
pp. 3447-3449 ◽  
Author(s):  
Marvin H. Goodrow ◽  
Jose A. Villarreal ◽  
Edward J. Grubbs
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study ◽  
Tert Butyl

Kinetic study of the second stage of the dolomite thermal decomposition

2008 ◽  
Vol 33 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Haykel Galai ◽  
Michèle Pijolat ◽  
Françoise Valdivieso ◽  
Kais Nahdi ◽  
Malika Trabelsi-Ayadi
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study ◽  
Second Stage

Thermal decomposition of trimethylsilyl tert-butyl persuccinate

1981 ◽  
Vol 30 (12) ◽  
pp. 2333-2336
Author(s):  
G. A. Razuvaev ◽  
G. V. Basova ◽  
O. S. D′yachkovskaya ◽  
V. A. Dodonov ◽  
S. V. Krasnodubskaya
Keyword(s):  
Thermal Decomposition ◽  
Tert Butyl

scholarly journals Kinetic study on thermal decomposition of toluene in a micro fluidized bed reactor

2015 ◽  
Vol 106 ◽  
pp. 721-727 ◽  
Author(s):  
Chao Gai ◽  
Yuping Dong ◽  
Pengfei Fan ◽  
Zhaoling Zhang ◽  
Jingcui Liang ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor

Tri(tert-butyl)phosphinoxid, -imin, -methylen und -boran / Tri(tert-butyl)phosphine Oxide, Imine, Methylene and Borane

1978 ◽  
Vol 33 (12) ◽  
pp. 1556-1558 ◽  
Author(s):  
Hubert Schmidbaur ◽  
Günter Blaschke
Keyword(s):  
Thermal Decomposition ◽  
Phosphine Oxide ◽  
Steric Hindrance ◽  
Reductive Elimination ◽  
Tert Butyl

Abstract Tri(tert-butyl)phosphine Oxide, Imine, Methylene, Borane Tri(tert-butyl)phosphine oxide, imine, methylene and borane have been prepared and their properties investigated. The imine is chemically inert due to strong steric hindrance. Its thermal decomposition at 200 °C leads to tri(tert-butyl)-pliosphine, in contrast to the methylene analogue which undergoes reductive elimination of isobutene. Both the oxide and borane are thermally very stable (> 250 °C).

scholarly journals Kinetic study on thermal decomposition of woods in oxidative environment

Fuel ◽  
2009 ◽  
Vol 88 (6) ◽  
pp. 1024-1030 ◽  
Author(s):  
D.K. Shen ◽  
S. Gu ◽  
K.H. Luo ◽  
A.V. Bridgwater ◽  
M.X. Fang
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Study

scholarly journals Study of thermal behavior of phytic acid

2013 ◽  
Vol 49 (2) ◽  
pp. 275-283 ◽  
Author(s):  
André Luis Máximo Daneluti ◽  
Jivaldo do Rosário Matos
Keyword(s):  
Thermal Decomposition ◽  
Thermal Behavior ◽  
Mass Loss ◽  
Kinetic Study ◽  
Phytic Acid ◽  
Absorption Spectroscopy ◽  
Elemental Analysis ◽  
Reaction Order ◽  
Dehydration Process ◽  
Thermogravimetric Method

Phytic acid is a natural compound widely used as depigmenting agent in galenic cosmetic emulsions. However, we have observed experimentally that phytic acid, when heated to 150 ºC for around one hour, shows evidence of thermal decomposition. Few studies investigating this substance alone with regard to its stability are available in the literature. This fact prompted the present study to characterize this species and its thermal behavior using thermal analysis (TG/DTG and DSC) and to associate the results of these techniques with those obtained by elemental analysis (EA) and absorption spectroscopy in the infrared region. The TG/DTG and DSC curves allowed evaluation of the thermal behavior of the sample of phytic acid and enabled use of the non-isothermal thermogravimetric method to study the kinetics of the three main mass-loss events: dehydration I, dehydration II and thermal decomposition. The combination of infrared absorption spectroscopy and elemental analysis techniques allowed evaluation of the intermediate products of the thermal decomposition of phytic acid. The infrared spectra of samples taken during the heating process revealed a reduction in the intensity of the absorption band related to O-H stretching as a result of the dehydration process. Furthermore, elemental analysis results showed an increase in the carbon content and a decrease in the hydrogen content at temperatures of 95, 150, 263 and 380 °C. Visually, darkening of the material was observed at 150 °C, indicating that the thermal decomposition of the material started at this temperature. At a temperature of 380 °C, thermal decomposition progressed, leading to a decrease in carbon and hydrogen. The results of thermogravimetry coupled with those of elemental analysis allow us to conclude that there was agreement between the percentages of phytic acid found in aqueous solution. The kinetic study by the non-isothermal thermogravimetric method showed that the dehydration process occurred in two stages. Dehydration step I promoted a process of vaporization of water (reaction order of zero), whereas dehydration step II showed an order of reaction equal to five. This change in reaction order was attributed to loss of chemically bonded water molecules of phytic acid or to the presence of volatile substances. Finally, the thermal decomposition step revealed an order of reaction equal to one. It was not possible to perform the kinetic study for other stages of mass loss.

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