Activation energy distribution : a key parameter in basin modeling and a geochemical technique for studying maturation and organic facies

2018 ◽  
Author(s):  
P. Sundararaman
Keyword(s):  
Activation Energy ◽  
Energy Distribution ◽  
Basin Modeling ◽  
Organic Facies ◽  
Key Parameter

Determination of kerogen activation energy distribution

1992 ◽  
Vol 6 (6) ◽  
pp. 793-803 ◽  
Author(s):  
Padmanabhan Sundararaman ◽  
Paul H. Merz ◽  
Roy G. Mann
Keyword(s):  
Activation Energy ◽  
Energy Distribution

Evolution of structural and dynamic heterogeneities and activation energy distribution of deformation units in metallic glass

2013 ◽  
Vol 102 (10) ◽  
pp. 101903 ◽  
Author(s):  
W. Jiao ◽  
P. Wen ◽  
H. L. Peng ◽  
H. Y. Bai ◽  
B. A. Sun ◽  
...  
Keyword(s):  
Activation Energy ◽  
Metallic Glass ◽  
Energy Distribution

scholarly journals Kinetic analysis of the pyrolysis of apricot stone and its main components via distributed activation energy mode

BioResources ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. 1187-1204
Author(s):  
Huanhuan Ma ◽  
Yimeng Zhang ◽  
Liangcai Wang ◽  
Zhengxiang Zhu ◽  
Yu Chen ◽  
...  
Keyword(s):  
Activation Energy ◽  
Energy Distribution ◽  
Apparent Activation Energy ◽  
Early Stage ◽  
Conversion Degree ◽  
Heating Rates ◽  
Continuous Increase ◽  
Thermogravimetric Analyzer ◽  
Energy Mode ◽  
Main Components

The kinetics of pyrolysis of apricot stone and its main components, i.e., lignin, cellulose, and hemicellulose, were investigated via distributed activation energy mode. Experiments were done in a thermogravimetric analyzer at heating rates of 10, 20, 30, and 40 K·min-1 under nitrogen. The activation energy distribution peaks for the apricot stone, lignin, cellulose, and hemicellulose were centered at 246, 318, 364, and 170 kJ·mol-1, respectively. The activation energy distribution for the apricot stone slightly changed; lignin exhibited the widest distribution; and cellulose exhibited the highest activation energy at a conversion degree (α) of less than 0.75. At low pyrolysis temperatures (400 K to 600 K), the pyrolysis of hemicellulose was the main pyrolysis reaction. The apparent activation energy for the apricot stone mainly depended on the pyrolysis of hemicellulose and a small amount of lignin, and the activation energy was low in the early stage of pyrolysis. With the continuous increase in the pyrolysis temperatures (600 K to 660 K), the thermal weight loss of cellulose and lignin was intense. The apparent activation energy for the apricot stone mainly resulted from the pyrolysis of cellulose and lignin, and a higher activation energy was observed in the later stage of pyrolysis.

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