Kinetics of thermal degradation of a Japanese oil sand

Alade, Olalekan; Sasaki, Kyuro; Sugai, Yuichi; Konadu, Kojo T.; Ansah, Eric O.; Ademodi, B.; Ueda, Ryo

doi:10.1016/j.ejpe.2017.08.001

Cited by 7 publications

(11 citation statements)

References 25 publications

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“…However, these observations are possibly due to higher heat and mass transfer efficiency at lower pressure and heating rates (under inert condition), which eventually leads to higher cracking and weight loss in form of volatiles. [ 9 ] As reported in the literature, [ 17,23,25,27,28,31,46,53,54 ] the weight loss increases with increasing partial pressure of oxygen during TGA experiments. On the contrary, the observation from the present work indicates decreasing reactivity as the pressure increases under inert environment.…”

Section: Resultsmentioning

confidence: 62%

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Kinetic and thermodynamic modelling of thermal decomposition of bitumen under high pressure enhanced with simulated annealing and artificial intelligence

et al. 2021

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Thermogravimetric analysis (TGA) of energy resources including bitumen provides kinetic parameters, which can be applied in design and simulation of processes for thermal recovery and conversion. In this investigation, pressurized non‐isothermal decomposition of bitumen under inert environment has been studied. The kinetic parameters were calculated at different pressures (0.1, 0.5, and 1 MPa) and heating rates (10, 20, and 30°C/min) using the differential method. The parameters were later optimized using simulated annealing (SA) optimization algorithm. The results were subsequently validated by comparing the predicted conversion (α) with those of artificial neural network (ANN). Thermodynamic parameters (enthalpy, entropy, and Gibb's free energy) were also calculated using the optimized kinetic parameters. The TGA results show that weight loss and thermal conversion decreased as the total pressure increased from 0.1–1 MPa, at all heating rates. Conversely, the thermal conversion rate (dα/dT) was observed to first decrease with increasing pressure (0.1–1 MPa) within the low temperature oxidation (LTO) and fuel deposition (FD) regions. In contrast, it increased with increasing total pressure within the high temperature oxidation (HTO) region. Furthermore, it was observed that the activation energy (Ea) increased with increasing pressures at all heating rates, while the frequency factor (A) was independent of the pressure or the heating rates. In addition, the thermodynamic parameters tend to increase with increasing pressure. Ultimately, the results established that the SA algorithm could be used to enhance the performance of the differential modelling method in calculating kinetic parameters and predicting the conversion.

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Section: Resultsmentioning

confidence: 62%

“…The kinetic parameters were obtained using the Arrhenius based method (by solving Equations ( 5) and ( 6)) as presented in our previous studies. [1,9,11] Then, after introducing β in Equation ( 5) and discretizing, Equations ( 12) and ( 13) are obtained as follows:…”

Section: Thermal Decomposition Kinetics and Sa Optimizationmentioning

confidence: 99%

Kinetic and thermodynamic modelling of thermal decomposition of bitumen under high pressure enhanced with simulated annealing and artificial intelligence

et al. 2021

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“…The kinetic parameters between 403 and 502 °C were presented. Similarly, Alade et al 20 Combustion and pyrolysis are both thermochemical reaction processes. Combustion occurs in the presence of oxygen and produces heat, CO 2 , and water from hydrocarbon.…”

Section: Introductionmentioning

confidence: 99%

“…More so, various simulators developed for the ISC rely on the conversion kinetic models, which require the knowledge of activation energies and frequency factors . Thus, over the past few decades, the capability of the thermoanalytical methods, such as thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), to predict the kinetic characteristics of thermal decomposition of bitumen or oil sand have been harnessed by several researchers. ,,− …”

Section: Introductionmentioning

confidence: 99%

“…The kinetic parameters between 403 and 502 °C were presented. Similarly, Alade et al presented thermal decomposition kinetics of an oil sand based on three stages of weight loss and/or the conversion, including volatilization of the moisture content and the light hydrocarbon (20–227 °C), combustion of the heavy hydrocarbon (227–527 °C), and oxidative decomposition of the carbonaceous organic matter (502–877 °C). In addition, El-Shoubary categorized the thermochemical conversion zones along five different temperature regimes, namely, (1) light oil distillation (25–180 °C), (2) heavy oil distillation (180–270 °C), (3) light to medium hydrocarbon combustion (300–350 °C), (4) heavy hydrocarbon combustion (350–450 °C), and (5) coke combustion (450–650 °C).…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of Thermal Decomposition of Tar in the Presence of Air and Nitrogen Gas

et al. 2019

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Thermogravimetric analysis (TGA) provides useful information, which can be used in thermal processing and conversion kinetic modeling of materials, including hydrocarbons. In the present study, a series of TGA experiments were conducted in the presence of air (combustion) and under inert conditions (pyrolysis) using nitrogen gas with the focus of obtaining quantitative information to compare thermal decomposition characteristics of the two processes. The analysis was performed at different gas injection rates (10–50 mL/min) and heating rates (10–30 °C/min) under non-isothermal conditions from 30 to 600 °C. It was observed that the gas injection rates did not have significant impact on the thermal decomposition of the tar sample. However, increasing the heating rate shifted the peak temperatures of the reactions to higher temperatures. In addition, the combustion process generally has a higher conversion and peak rate of conversion than the pyrolysis process. Moreover, the activation energy, E a (kJ mol–1), obtained for the combustion process was observed to be higher than those of the pyrolysis.

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Improved thermogravimetric system for processing of oil sludge using HY zeolite catalyst

Silva

Morais

Silveira

et al. 2018

J Therm Anal Calorim

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Kinetics of thermal degradation of a Japanese oil sand

Cited by 7 publications

References 25 publications

Kinetic and thermodynamic modelling of thermal decomposition of bitumen under high pressure enhanced with simulated annealing and artificial intelligence

Kinetic and thermodynamic modelling of thermal decomposition of bitumen under high pressure enhanced with simulated annealing and artificial intelligence

Kinetics of Thermal Decomposition of Tar in the Presence of Air and Nitrogen Gas

Improved thermogravimetric system for processing of oil sludge using HY zeolite catalyst

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