Thermal Decomposition of 4-Methylpyrimidine. Experimental Results and Kinetic Modeling

2001 ◽  
Vol 105 (14) ◽  
pp. 3542-3554
Author(s):  
Assa Lifshitz ◽  
Aya Suslensky ◽  
Carmen Tamburu
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Modeling ◽  
Experimental Results

scholarly journals An Experimental Study of the Decomposition and Carbonation of Magnesium Carbonate for Medium Temperature Thermochemical Energy Storage

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1316
Author(s):  
Daniel Mahon ◽  
Gianfranco Claudio ◽  
Philip Eames
Keyword(s):  
Thermal Analysis ◽  
Thermal Decomposition ◽  
Energy Storage ◽  
Magnesium Carbonate ◽  
Experimental Results ◽  
Future Research ◽  
Medium Temperature ◽  
Different Temperatures ◽  
Decomposition Enthalpy ◽  
Co2 Atmosphere

To improve the energy efficiency of an industrial process thermochemical energy storage (TCES) can be used to store excess or typically wasted thermal energy for utilisation later. Magnesium carbonate (MgCO3) has a turning temperature of 396 °C, a theoretical potential to store 1387 J/g and is low cost (~GBP 400/1000 kg). Research studies that assess MgCO3 for use as a medium temperature TCES material are lacking, and, given its theoretical potential, research to address this is required. Decomposition (charging) tests and carbonation (discharging) tests at a range of different temperatures and pressures, with selected different gases used during the decomposition tests, were conducted to gain a better understanding of the real potential of MgCO3 for medium temperature TCES. The thermal decomposition (charging) of MgCO3 has been investigated using thermal analysis techniques including simultaneous thermogravimetric analysis and differential scanning calorimetry (TGA/DSC), TGA with attached residual gas analyser (RGA) and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) (up to 650 °C). TGA, DSC and RGA data have been used to quantify the thermal decomposition enthalpy from each MgCO3.xH2O thermal decomposition step and separate the enthalpy from CO2 decomposition and H2O decomposition. Thermal analysis experiments were conducted at different temperatures and pressures (up to 40 bar) in a CO2 atmosphere to investigate the carbonation (discharging) and reversibility of the decarbonation–carbonation reactions for MgCO3. Experimental results have shown that MgCO3.xH2O has a three-step thermal decomposition, with a total decomposition enthalpy of ~1050 J/g under a nitrogen atmosphere. After normalisation the decomposition enthalpy due to CO2 loss equates to 1030–1054 J/g. A CO2 atmosphere is shown to change the thermal decomposition (charging) of MgCO3.xH2O, requiring a higher final temperature of ~630 °C to complete the decarbonation. The charging input power of MgCO3.xH2O was shown to vary from 4 to 8136 W/kg with different isothermal temperatures. The carbonation (discharging) of MgO was found to be problematic at pressures up to 40 bar in a pure CO2 atmosphere. The experimental results presented show MgCO3 has some characteristics that make it a candidate for thermochemical energy storage (high energy storage potential) and other characteristics that are problematic for its use (slow discharge) under the experimental test conditions. This study provides a comprehensive foundation for future research assessing the feasibility of using MgCO3 as a medium temperature TCES material. Future research to determine conditions that improve the carbonation (discharging) process of MgO is required.

Kinetic Modeling of Coal Thermal Decomposition under Air Atmosphere

2016 ◽  
Vol 30 (6) ◽  
pp. 5158-5166 ◽  
Author(s):  
Peng Chen ◽  
Lang Zhang ◽  
Kai Huang
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Modeling ◽  
Air Atmosphere

KINETIC MODELING OF THERMAL DECOMPOSITION OF ALUMINUM SULFATE

1988 ◽  
Vol 74 (1) ◽  
pp. 47-61 ◽  
Author(s):  
NITIN G. APTE ◽  
ERDOGAN KIRAN ◽  
J. C. HASSLER ◽  
JOSEPH V. CHERNOSKY
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Modeling ◽  
Aluminum Sulfate

Benzene Oxidation: Experimental Results in a JDR and Comprehensive Kinetic Modeling in JSR, Shock-Tube and Flame

2001 ◽  
Vol 167 (1) ◽  
pp. 223-256 ◽  
Author(s):  
A. RISTORI ◽  
P. DAGAUT ◽  
A. EL BAKALI ◽  
G. PENGLOAN ◽  
M. CATHONNET
Keyword(s):  
Shock Tube ◽  
Kinetic Modeling ◽  
Experimental Results ◽  
Benzene Oxidation
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