Kinetic analysis of in situ combustion processes with thermogravimetric and differential thermogravimetric analysis and reaction tube experiments

Kök, Mustafa Verşan; Okandan, Ender

doi:10.1016/0165-2370(94)00812-f

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…The heat required to reduce the viscosity of the heavy crude is obtained mostly from the combustion of coke formed during cracking in the reservoir. ISC is a complex process involving simultaneous heat and mass transfer in a multiphase environment coupled with chemical reactions of the crude oil combustion . To develop the ability to forecast and improve the design and field performance of the ISC processes, the development of an accurate reaction kinetics model for numerical simulation is required.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Studies on Pyrolysis and Combustion Behavior of a Heavy Oil and Its Asphaltenes

2006

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A thermogravimetric analyzer (TGA) was used to obtain information on the pyrolysis and combustion behavior of both crude oil (Neilburg) and its asphaltenes, each mixed with reservoir sand. Of all the saturate, aromatic, resin, and asphaltene fractions, asphaltenes contribute the most to the formation of coke (fuel). Temperatureramped as well as the isothermal pyrolysis experiments on whole oil and asphaltenes were analyzed to determine the temperature at which coke formation was maximized. Furthermore, isothermal combustion curves for coke derived from whole oil and asphaltenes were obtained to provide reliable data for calculating the kinetics of the reactions. The classical Arrhenius model was applied, and the activation energy for the combustion of coke formed from pure asphaltenes and from the whole oil was calculated. The results showed that the Arrhenius model fitted the data well in the entire range of temperatures the experiments were conducted. The source material for the coke led to modest differences in its reactivity. The observed activation energy for asphaltenes was 117.7 kJ/mol, and for the whole oil it was 129.5 kJ/mol, which indicates that they were in close agreement. Also, the combustion of coke from asphaltenes showed a reaction order of 0.4 at 375°C, which gradually increased to 0.9 at 525°C. For whole oil, it increased from 0.5 at 375°C to 0.7 at 500°C.

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Section: Introductionmentioning

confidence: 99%

Thermogravimetric Studies on Pyrolysis and Combustion Behavior of a Heavy Oil and Its Asphaltenes

2006

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“…The selected heating rate compares favorably to other TGF experiments involving heavy oils and solid mixtures. [1][2][3] Although the heating rate could be lowered further, doing so would increase run time and computer data file size and, thus, would not be justified until more was known about the process. In all cases, an air flow of 79 mL/min is used (i.e., oxidative environment), which is higher than that used for a crude oil/solid mixture (i.e., 53 mL/min 1 ), since it was necessary to help evacuate some of the condensing organic fumes generated during the process.…”

Section: Discussion Of Methods Development Experimental Conditionsmentioning

confidence: 99%

New Methodology for the Application of a TGF-FTIR to Study Low Temperature Treatment of Waste Oil

Lalla

Koziński

1999

Journal of the Air & Waste Management Association

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A new methodology was developed using a Thermo-Gravimetric Furnace coupled to a Fourier Transform Infrared Spectrometer (TGF-FTIR) to study the low temperature treatment of waste lubricating oils. The sample was heated from room temperature to a final temperature of 1,000°Cat an initial heating rate of 3 °C/min, to slow down the oxidative pyrolysis process allowing for the events taking place to be observable. It was found that the majority of the process in terms of weight loss and gas-phase evolution was over by 650 °C, and thus, the remainder of the sample heating was accomplished at a rate of 5 °C/ min. The sample was kept at a temperature of 1,000 °C for 60 minutes in order to allow the remaining solid material to achieve a state of equilibrium (necessary for the solid morphological study). The applicability of TGF-FTIR using this methodology to research in the environmental field was proven to be quite successful, since it allowed for precise control over environmental conditions while simultaneously allowing for data gathering on both IMPLICATIONS Thermal treatment of waste oils is becoming an attractive disposal option. However, the information on the thermal behavior of wastes and their generated pollutants in industrial-size reactors is scarce due to the complexity and the lack of accessibility of such systems to detailed experimental studies that are capable of fundamental interpretation. The research described provides a reliable and practical approach to determine events taking place in waste treatment systems. Specifically, it would be applicable when pyrolysis, oxidative pyrolysis and oxidation processes are involved (as is the case in actual incineration systems). Design of new, practical waste combustion systems depends on the rate and extent of these processes. The proposed method will allow for studying specific environmental concerns such as effect of various process parameters (heating rate, residence time, temperature) on release, formation or destruction of gaseous pollutants. Such information would help to design practical systems in which waste oils were thermally treated.sample weight and gas-phase evolution. The developed methodology proved to be reliable, giving repeatable results. The information gathered was used to understand and explain the evolution of the waste oil from initial liquid state to a final solid ash state. It was accomplished in four steps, including (1) release of moisture/light hydrocarbons, (2) bulk volatilization of hydrocarbons, (3) solid material deposition, and (4) solids oxidation.

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“…Revival of interest in the ISC method has been attained due to some commercial success and considerable technological improvements in recent years. () A combustion process in porous medium is quite complicated with uncertainties mostly dependent on stability and propagation of combustion front …”

Section: Introductionmentioning

confidence: 99%

“…8,9 A combustion process in porous medium is quite complicated with uncertainties mostly dependent on stability and propagation of combustion front. 10 Three groups of oxidation reactions during ISC processes have been identified by researchers and accepted universally, namely, high-temperature oxidation (HTO), pyrolysis, and low-temperature oxidation (LTO). 11,12 The three typical reactions play a significant role in thermal analysis during ISC processes.…”

Section: Introductionmentioning

confidence: 99%

Enhanced in situ combustion of heavy crude oil by nickel oxide nanoparticles

2019

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Summary Nickel oxide nanoparticles were synthesized by microemulsion method and characterized by powder X‐ray diffraction, dynamic light scattering, and scanning electron microscopy. Thermal analyses were performed to identify the influence of nickel oxide nanoparticles on the in situ combustion of Liaohe heavy oil. Low‐temperature oxidation and coking process were investigated by analysing the effluent gases and the fractions of saturates, aromatics, resins, and asphaltenes. Combustion tube tests were also conducted to evaluate the catalytic performance of nickel oxide nanoparticles. Compared with the runs without catalysts, the effective activation energies were reduced by 4.22%, 20.57%, and 35.75% in terms of low‐temperature oxidation, pyrolysis, and high‐temperature oxidation, respectively. The reduction in O2 fraction and the increase in CO2 and O2 uptake were also confirmed. The overall trend presented the increase of saturates and aromatics fraction and the decline of resins and asphaltenes fraction while temperature was increased during low‐temperature oxidation. Adding nickel oxide nanoparticles led to the reduction in the fuel deposit during pyrolysis. Compared with the base combustion tube runs, combustion time in catalytic experiment was shortened by 12.1%, combustion front movement was accelerated by 9.1%, oil recovery was enhanced by 4.0%, and oil viscosity was reduced by 61.2%.

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Kinetic analysis of in situ combustion processes with thermogravimetric and differential thermogravimetric analysis and reaction tube experiments

Cited by 22 publications

References 9 publications

Thermogravimetric Studies on Pyrolysis and Combustion Behavior of a Heavy Oil and Its Asphaltenes

Thermogravimetric Studies on Pyrolysis and Combustion Behavior of a Heavy Oil and Its Asphaltenes

New Methodology for the Application of a TGF-FTIR to Study Low Temperature Treatment of Waste Oil

Enhanced in situ combustion of heavy crude oil by nickel oxide nanoparticles

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