Kinetics of Bu-NENA Evaporation from Bu-NENA/NC Propellant Determined by Isothermal Thermogravimetry

2016 ◽  
Vol 42 (3) ◽  
pp. 253-259 ◽  
Author(s):  
Benbo Zhao ◽  
Tianfu Zhang ◽  
Zhen Wang ◽  
Shixiong Sun ◽  
Zhen Ge ◽  
...  
Keyword(s):  
Isothermal Thermogravimetry ◽  
Kinetics Of

Investigation on Thermal Decomposition Kinetics of Ulipristal Acetate (Form B)

2013 ◽  
Vol 791-793 ◽  
pp. 260-264
Author(s):  
Rong Rong Lei ◽  
Zuo Liang Sha ◽  
Liang Zhu ◽  
Li Bin Yang ◽  
Yan Fei Wang
Keyword(s):  
Thermal Decomposition ◽  
Differential Method ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Experimental Result ◽  
Ulipristal Acetate ◽  
Isothermal Thermogravimetry ◽  
Decomposition Mechanisms ◽  
Kinetics Of ◽  
Acetate Form

Non-isothermal thermogravimetry analysis was applied to study the thermal decomposition kinetics of ulipristal acetate (form B). According to the experimental result, ulipristal acetate (form B) decomposed included three steps. Based on different kinetics function of corresponding thermal decomposition mechanisms and experimental data of ulipristal acetate (form B), decomposition mechanisms of three steps of ulipristal acetate (form B) were analyzed by differential method. According to fitting results of different mechanism functions, decomposition mechanisms of three steps of ulipristal acetate (form B) were determined, and three corresponding thermal decomposition dynamic functions were also obtained.

Inside Back Cover: Kinetics of Bu-NENA Evaporation from Bu-NENA/NC Propellant Determined by Isothermal Thermogravimetry (Prop., Explos., Pyrotech. 3/2017)

2017 ◽  
Vol 42 (3) ◽  
pp. 343-343
Author(s):  
Benbo Zhao ◽  
Tianfu Zhang ◽  
Zhen Wang ◽  
Shixiong Sun ◽  
Zhen Ge ◽  
...  
Keyword(s):  
Isothermal Thermogravimetry ◽  
Back Cover ◽  
Kinetics Of

Pyrolysis kinetics of chitin by non-isothermal thermogravimetry

2005 ◽  
Vol 433 (1-2) ◽  
pp. 200-208 ◽  
Author(s):  
Pawel Stolarek ◽  
Stanislaw Ledakowicz
Keyword(s):  
Pyrolysis Kinetics ◽  
Isothermal Thermogravimetry ◽  
Kinetics Of

Pyrolysis kinetics of olive residue/plastic mixtures by non-isothermal thermogravimetry

2009 ◽  
Vol 90 (5) ◽  
pp. 722-728 ◽  
Author(s):  
A. Aboulkas ◽  
K. El harfi ◽  
A. El bouadili ◽  
M. Nadifiyine ◽  
M. Benchanaa ◽  
...  
Keyword(s):  
Pyrolysis Kinetics ◽  
Isothermal Thermogravimetry ◽  
Olive Residue ◽  
Kinetics Of

The kinetics of dehydroxylation of kaolinite

Clay Minerals ◽  
1987 ◽  
Vol 22 (4) ◽  
pp. 447-456 ◽  
Author(s):  
S. A. T. Redfern
Keyword(s):  
Activation Energy ◽  
Reaction Mechanism ◽  
Kinetic Analysis ◽  
Rate Constants ◽  
Avrami Equation ◽  
Isothermal Thermogravimetry ◽  
Temperature Range ◽  
Homogeneous Models ◽  
Kinetics Of ◽  
Fraction Method

AbstractThe dehydroxylation of kaolinite has been investigated by isothermal thermogravimetry. Kinetic analysis using the Avrami equation shows that a combination of atomic mechanisms operates throughout the temperature range 734 K to 890 K. An empirical activation energy of 222 kJ mol-1 was calculated from the Arrhenius relationship using rate constants based on diffusion and homogeneous models. The activation energy (Ea) was calculated for a series of degrees of dehydroxylation by the time to a given fraction method, showing an increase in Ea during the early stages of the reaction. The isothermal plots indicate that OH is retained in the final stages of the reaction. The observations are explained in terms of a reaction mechanism in which kaolinite grains dehydroxylate from the edges inwards, parallel to (001).

Kinetics of Reduction Roasting of Hematite to Magnetite in Crude Niobium Concentrate under Microwave Irradiation

2011 ◽  
Vol 201-203 ◽  
pp. 1714-1720 ◽  
Author(s):  
Jie Li ◽  
Lei Wang ◽  
Bao Wei Li ◽  
Bang Wen Zhang
Keyword(s):  
Activation Energy ◽  
Weight Loss ◽  
Reaction Rate ◽  
Gravimetric Analysis ◽  
Resistance Heating ◽  
Reduction Roasting ◽  
Isothermal Thermogravimetry ◽  
Kinetics Of ◽  
Kinetics Of Reduction ◽  
Weight Loss Process

In this paper, the method of microwave reduction roasting was applied to investigate the heating and weight loss process from hematite to magnetite in crude niobium concentrate under the protection of argon. The kinetics of microwave reduction roasting of hematite in crude niobium concentrate were analyzed and calculated at the temperature range of 500°C ~850°C by way of non-isothermal thermogravimetry and isothermal gravimetric analysis. Results from this investigation demonstrated that the activation energy of microwave reduction roasting calculated by non-isothermal thermogravimetry was 26.5769kJ•mol-1, and the activation energy calculated by isothermal gravimetric analysis was 64.1203kJ•mol-1. Compared with the method of reduction roasting under resistance heating, the activation energy of microwave reduction roasting was small, and the reaction rate was fast.

Sign in / Sign up

Export Citation Format

Share Document