Pyrolysis of petroleum sludge under non-isothermal conditions: Thermal decomposition behavior, kinetics, thermodynamics, and evolved gas analysis

Fuel ◽  
2021 ◽  
Vol 300 ◽  
pp. 120980
Author(s):  
Gamzenur Özsin ◽  
Esin Apaydın-Varol ◽  
Murat Kılıç ◽  
Ayşe E. Pütün ◽  
Ersan Pütün
Keyword(s):  
Thermal Decomposition ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Evolved Gas ◽  
Isothermal Conditions ◽  
Petroleum Sludge ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

scholarly journals Study on Thermal Decomposition Behavior, Gaseous Products, and Kinetic Analysis of Bis-(Dimethylglyoximato) Nickel(II) Complex Using TG-DSC-FTIR-MS Technique

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 331
Author(s):  
Ergang Yao ◽  
Siyu Xu ◽  
Fengqi Zhao ◽  
Taizhong Huang ◽  
Haijian Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Analysis ◽  
Evolved Gas Analysis ◽  
Decomposition Reaction ◽  
Exothermic Peak ◽  
Gas Analysis ◽  
Gaseous Products ◽  
Random Nucleation ◽  
Thermal Decomposition Behavior ◽  
Decomposition Behavior

The fiber-like bis-(dimethylglyoximato) nickel(II) complex, Ni(DMG)2 was successfully synthesized. The obtained samples were characterized by SEM-EDS, FT-IR, XRD, and XPS. The TG-DSC-FTIR-MS coupling technique was used to characterize the thermal decomposition behavior and evolved gas analysis of Ni(DMG)2. The non-isothermal decomposition reaction kinetic parameters were obtained by both combined kinetic analysis and isoconversional Vyazovkin methods. It was found that Ni(DMG)2 begins to decompose at around 280 °C, and a sharp exothermic peak is observed in the DSC curve at about 308.2 °C at a heating rate of 10 °C·min−1. The main gaseous products are H2O, NH3, N2O, CO, and HCN, and the content of H2O is significantly higher than that of the others. The activation energy obtained by the combined kinetic analysis method is 170.61 ± 0.65 kJ·mol−1. The decomposition process can be described by the random nucleation and growth of the nuclei model. However, it was challenging to attempt to evaluate the reaction mechanism precisely by one ideal kinetic model.

Thermal decomposition studies on polyurethane elastomers reinforced with polyhedral silsesquioxanes by evolved gas analysis

2018 ◽  
Vol 149 ◽  
pp. 129-142 ◽  
Author(s):  
Joanna Pagacz ◽  
Edyta Hebda ◽  
Bartłomiej Janowski ◽  
Dariusz Sternik ◽  
Małgorzata Jancia ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Polyurethane Elastomers ◽  
Evolved Gas

Thermal evolution of Mg-Al-CO3 hydrotalcites

Clay Minerals ◽  
2004 ◽  
Vol 39 (2) ◽  
pp. 177-191 ◽  
Author(s):  
Ts. Stanimirova ◽  
N. Piperov ◽  
N. Petrova ◽  
G. Kirov
Keyword(s):  
Thermal Decomposition ◽  
Mixed Oxides ◽  
Thermal Evolution ◽  
Evolved Gas Analysis ◽  
Gas Analysis ◽  
Water Molecules ◽  
Evolved Gas ◽  
Al Content ◽  
Dta Curves ◽  
High Al Content

AbstractThe thermal decomposition of hydrotalcite (HT), with chemical composition Mg1-xAlx(OH)2(CO3)x/2.(1-3x/2)H2O, (0.20 < x ≤ 0.33), is a complex sequence of dehydration, dehydroxylation and decarbonization and leads to the formation of a series of metaphases: HT-D (dehydrated HT), HT-B (partially dehydroxylated HT) and MO (mixed oxides with periclase-like structure). The evolution of water and CO2 in natural and synthetic hydrotalcites (a Mg/Al ratio between 2:1and 3.7:1), heated to 800°C, was investigated by differential thermal analysis, thermogravimetry and evolved gas analysis. At least six endothermic and two exothermic effects were established by computer-aided resolving of the curves. The formation of each HT metaphase was related to the release of a discrete number of water molecules depending on the Al content in the samples and each appeared as a corresponding endothermic peak in the DTA curves. The exothermic processes associated with the crystallization of HT-B and MO metaphases were specified by decomposition of DTA curves. The evolution of CO2 during the thermal decomposition of the carbonate groups was found to be different for the samples studied. The preservation of CO3 even at high temperatures was established for synthetic samples with a high Al content. The release of volatile H2O and CO2 (which comprise ~40% of the sample mass) provokes fine cracking both along and across the layers.

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