Kinetics on the Isothermal Decomposition of Oil Shale

2012 ◽  
Vol 581-582 ◽  
pp. 112-116 ◽  
Author(s):  
Hua Qing Xue ◽  
Hong Yan Wang ◽  
Gang Yan ◽  
Wei Guo ◽  
Xiao Bo Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Oil Shale ◽  
Kinetics Model ◽  
Isothermal Kinetics ◽  
Temperature Error ◽  
Isothermal Decomposition ◽  
Oil Shale Pyrolysis ◽  
Two Stages ◽  
Kinetics Of ◽  
Rapid Conversion

The kinetics of the thermal decomposition of Huadian oil shale was studied at five different isothermal atmospheres of 623K, 648K, 673K, 698K, and 723K. The temperature recorded was that of the sample that the temperature error between furnace and sample will eliminate. According to conversion data, the effect of increased temperature is to decrease the pyrolysis time. The conversion data described the oil shale pyrolysis as two stages, rapid conversion and modest conversion. The Arrhenius equations of ki=1.40×105e-109828/RT and kii=1.76×106e-130463/RT were obtain by isothermal kinetics model for each stage.

scholarly journals Effects of dopants on the isothermal decomposition kinetics of potassium metaperiodate

2011 ◽  
Vol 76 (8) ◽  
pp. 1129-1138
Author(s):  
Karuvanthodi Muraleedharan ◽  
Parambil Kannan ◽  
Ganga Devi
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Kinetic Model ◽  
Entire Range ◽  
Decomposition Kinetics ◽  
Isothermal Decomposition ◽  
Acceleration Period ◽  
Two Stages ◽  
Kinetics Of

The isothermal decomposition and kinetics of potassium metaperiodate (KIO4) were studied by thermogravimetry as a function of the concentration of dopants. The thermal decomposition of KIO4 proceeds mainly through two stages: an acceleration period up to ? = 0.50 and a decay stage. The thermal decomposition data for both doped and untreated KIO4 were found to be best described by the Prout-Tompkins Equation. The ? - t data of doped and untreated samples of KIO4 were subjected to isoconversional studies for the determination of the activation energy values. The isoconversional studies of the isothermal decomposition of untreated and doped samples of KIO4 indicated that the thermal decomposition of KIO4 proceeds through a single kinetic model, the Prout-Tompkins model, throughout the entire range of conversion, as opposed to earlier observations.

Co-pyrolysis kinetics of sewage sludge and oil shale thermal decomposition using TGA–FTIR analysis

2016 ◽  
Vol 118 ◽  
pp. 345-352 ◽  
Author(s):  
Yan Lin ◽  
Yanfen Liao ◽  
Zhaosheng Yu ◽  
Shiwen Fang ◽  
Yousheng Lin ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Sewage Sludge ◽  
Oil Shale ◽  
Ftir Analysis ◽  
Pyrolysis Kinetics ◽  
Kinetics Of

Evaluation of isothermal kinetics of the thermal decomposition of guanidine nitrate in constant volume

2018 ◽  
Vol 36 (4) ◽  
pp. 412-423 ◽  
Author(s):  
Dong Ze ◽  
Chen Yingying ◽  
Chen Liping ◽  
Chen Wanghua ◽  
Zhang Jun ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Constant Volume ◽  
Isothermal Kinetics ◽  
Guanidine Nitrate ◽  
Kinetics Of

Nitridation Isothermal Kinetics of In Situ β-Sialon Bonded Al2O3-C Refractories

2016 ◽  
Vol 697 ◽  
pp. 572-575
Author(s):  
Xue Qing Yang ◽  
Nai Peng ◽  
Cheng Ji Deng
Keyword(s):  
Activation Energy ◽  
Apparent Activation Energy ◽  
Isothermal Kinetics ◽  
Nitridation Reaction ◽  
Result Show ◽  
Different Temperatures ◽  
Two Stages ◽  
Kinetics Of ◽  
And Diffusion

The kinetics of in-situ β- Sialon bonded Al2O3-C (SAC) refractories were investigated by TGA techniques via isothermal nitridation experiments at different temperatures. The result show that the nitridation process of in-situ β-Sialon bonded Al2O3-C refractories can be divided into two stages: the nitridation reaction rate controlling stage in the first 10 min, and the apparent activation energy of nitridation reaction is 370 kJ/mol ; then the reaction is controlled by both chemical reaction and diffusion rate in the following 110 min, the apparent activation energy of nitridation reaction is 410 kJ/mol.

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