99/00930 Thermal reaction kinetics of coal series kaolinite

1999 ◽  
Vol 40 (2) ◽  
pp. 100
Keyword(s):  
Reaction Kinetics ◽  
Thermal Reaction ◽  
Kinetics Of

Thermal Reaction Kinetics of Fly Ash Cement Paste at the Age of 28 Days

2014 ◽  
Vol 668-669 ◽  
pp. 91-94 ◽  
Author(s):  
Xiao Fang He ◽  
Chang Wen Miao ◽  
Yong Hao Wu ◽  
Xin Xin Cao ◽  
Dan Liu
Keyword(s):  
Activation Energy ◽  
Fly Ash ◽  
Apparent Activation Energy ◽  
Reaction Kinetics ◽  
Thermal Reaction ◽  
Physical Parameters ◽  
Scanning Calorimetry ◽  
Kinetics Parameters ◽  
Cement Pastes ◽  
Kinetics Of

The thermal reaction kinetics of fly ash cement pastes were studied by Differential Scanning Calorimetry (DSC) and Thermal Gravity Analysis-Differential Thermal Gravity (TG-DTG) method, the kinetics parameters such as apparent activation energy was calculated by the Kissinger method, and the physical parameters were obtained. The result show that the fly ash cement pastes performance three endothermic reaction stages at different heating rates, peak temperatures of each stage at the range of 91.85~121.08°C, 453.93~496.48°C, and 680.21~751.62°C. TG-DTG show there were three thermal decomposition stages, thermal dehydration reaction apparent activation energy of fly ash cement pastes in each stage were 47.23kJ/mol, 128.84kJ/mol, and 134.07kJ/mol.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

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