Low-temperature combustion behavior of crude oils in porous media under air flow condition for in-situ combustion (ISC) process

Yuan, Chengdong; Sadikov, Kamil; Khaliullin, R. Sh.; Pu, Wanfen; Al‐Muntaser, Ameen A.; Mehrabi-Kalajahi, Seyedsaeed

doi:10.1016/j.fuel.2019.116293

Cited by 48 publications

(33 citation statements)

References 35 publications

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“…It contained the following. The internal structures of the device were presented in our earlier works in more detail. ,,,, The heating program of the heater was as follows: RT was increased to 50 °C for 2 min and maintained for 10 min, and then, the heater started to work with a heating rate of 10 °C/min until the temperature of 700 °C. During the reactions, the airflow was equal to 0.5 L/min in the reactor.…”

Section: Methodsmentioning

confidence: 99%

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

et al. 2021

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In this work, several transition metal-based acetylacetonates (Ni, Cu, and Fe) were prepared as oil-dispersed catalysts for heavy oil oxidation. X-ray diffraction (XRD), scanning electron microscopy (SEM), and Mössbauer spectroscopy were used for the characterization of catalysts. The effectivity of catalysts in the oxidation of heavy oil was investigated by a thermogravimetry method coupled with infrared spectroscopy (TG-FTIR) at four different heating rates (4, 6, 8, and 10 °C/min) and self-designed porous medium thermo-effect cell (PMTEC) techniques. The activation energy calculations using three isoconversional methods, Ozawa–Flynn–Wall (OFW), Kissinger–Akahira–Sunose (KAS), and Friedman, were performed based on thermal analysis data. The results showed that the bidentate ligand acetylacetonate (acac) provided good enough distribution of catalysts in heavy oil because in the presence of Cu(acac)2, Fe(acac)3, and Ni(acac)2, the oxidation temperature decreased in both fuel deposition (FD) and high-temperature oxidation (HTO). The activation energy of FD and HTO districts showed that Cu(acac)2 more efficiently catalyzed the oxidation of heavy oil than Fe(acac)3 and Ni(acac)2. The usage of Cu(acac)2 helped decrease the average activation energy of the in situ combustion process from 177 to 117 kJ/mol, from 187 to 127 kJ/mol, and from 198 to 128 kJ/mol based on OFW, KAS, and Friedman methods, respectively. The in situ transformation of the catalysts in the presence of heavy oil was studied under different isothermal conditions. Based on XRD and SEM data at 400 °C, Cu(acac)2 and Ni(acac)2 were transformed to CuO and NiO nanoparticles as the active form of catalysts. For Fe(acac)3, it was found that at 400 °C, it transformed to magnetite (Fe3O4) species; however, at 500 °C, hematite (α-Fe2O3) and maghemite (γ-Fe2O3) were the most predominant species. The heavy oil oxidation using these low-cost and easy to prepare catalysts could be the best route for improving the efficiency of in situ combustion in field applications.

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Section: Methodsmentioning

confidence: 99%

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

et al. 2021

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“…A prototype of this setup was the quartz combustion tube used to study the thermal effect and the influence of the catalyst on the combustion of hydrocarbons in porous media. 33 , 34 …”

Section: Methodsmentioning

confidence: 99%

Petroleum Coke Combustion in Fixed Fluidized Bed Mode in the Presence of Metal Catalysts

et al. 2020

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Petroleum coke is one of the waste products generated in the oil refining industry that can be used as fuel in energetics. However, the low volatile matter content and graphite-like structure of petroleum coke are the reasons for its high ignition temperature and combustion complexity. In this research, petroleum coke combustion and oxidation kinetics in the presence of metal catalysts were investigated. To evaluate the effect of the catalyst on the ignition temperature and the apparent activation energy, a new approach of a “fixed fluidized bed” was proposed. In this mode, petroleum coke particles spaced from each other by inert quartz powder kind of “freeze” in the porous layer. This regime allows us to determine the ignition temperature of petroleum coke particles in the static mode by differential thermography and calculate the activation energy by gas analysis. Organic and inorganic salts of copper, iron, and cerium are used as catalysts for petroleum coke combustion. A series of experiments were carried out in the porous media thermo-effect cell (PMTEC) and on a thermogravimetric (TG) analyzer. The kinetics of the combustion processes was calculated by Kissinger–Akahira–Sunose and Ozawa–Flynn–Wall methods. The results obtained in the “fixed bed” mode showed that the ignition temperature and the average apparent activation energy significantly decreased in the presence of CuCl 2 and FeCl 3 . The results obtained by the new approach were compared with the results of the thermogravimetric analysis.

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“…This stage is known as medium-temperature oxidation. Finally, the obtained fuel deposits (FDs) or in a large number of studies known as coke undergo oxidation at higher temperatures in the stage called the high-temperature oxidation (HTO) region. ,,− One of the main issues as per our knowledge of in situ combustion is a lack of a clear explanation of the early breakthrough of the combustion flame front after a short time of initiating the combustion, which majorly leads to the failure of most in situ combustion projects. Some preliminary works were carried out several years ago to study the real causes of combustion flame front instability using various catalysts such as transition metal (TM)-based compounds, metal oxides, water-soluble metals, oil-soluble metals, and minerals such as clay. − It is worthwhile noting that TMs and their oxides have received much attention for thermal EOR due to their high capacity for adsorption and activation of oxygen, as well as their contribution to the propagation steps to regenerate more free radicals during oxidation processes.…”

Section: Introductionmentioning

confidence: 99%

“…They also reported in other studies that both nickel and cobalt tallates significantly reduced the activation energy of the HTO region and increased the effective reaction rate constant . Yuan et al demonstrated that copper stearate shifted the low-temperature oxidation peak by around 50 °C at the onset and peak temperatures . Although several oil-soluble catalysts have been widely investigated for heavy oil recovery, research unfortunately has tended to focus on their effect on the recovery factor and in some cases on the nature of the metal used.…”

Section: Introductionmentioning

confidence: 99%

“…31 Yuan et al demonstrated that copper stearate shifted the low-temperature oxidation peak by around 50 °C at the onset and peak temperatures. 26 Although several oil-soluble catalysts have been widely investigated for heavy oil recovery, research unfortunately has tended to focus on their effect on the recovery factor and in some cases on the nature of the metal used. An additional drawback is that most of the previous studies have used a simple ligand that consisted only of a long alkyl chain and a carboxylate ion.…”

Section: ■ Introductionmentioning

confidence: 99%

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Effect of Ligand Structure on the Kinetics of Heavy Oil Oxidation: Toward Biobased Oil-Soluble Catalytic Systems for Enhanced Oil Recovery

Farhadian

Khelkhal

Tajik

et al. 2021

Ind. Eng. Chem. Res.

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In recent years, protection of the environment from activities associated with enhanced oil recovery has been considered a crucial priority for decision-makers in the international community. The in situ combustion process as a promising thermal enhanced oil recovery method has been attracting considerable interest in terms of improving oil production and environmental protection. However, this technique is not yet well studied. This paper outlines a new approach to improve the process of heavy oil oxidation by designing new biobased oil-soluble catalysts that are able to maintain and stabilize the combustion flame front of the in situ combustion process. A comprehensive theoretical and experimental study including thermal analysis (thermogravimetry/differential scanning calorimetry, TG/DSC) and quantum calculations was used to shed light on the effect of the ligand structure in the oil-soluble catalytic system on the heavy oil oxidation process. The obtained accurate results proved that metal interaction with the designed ligands increased, which led to a decrease in the energy of activation and an increase in the heavy oil oxidation reaction rate. Besides, the obtained DSC curves showed one peak in the presence of Cu and biobased ligands, contrary to the curves obtained for heavy oil oxidation reported with other ligands and metals. In other words, the obtained catalysts merged low-temperature-and high-temperature oxidation regions into one region. These findings reveal that the structure of ligands can significantly affect their interaction with metals in oil-soluble catalysts, and therefore the efficiency of catalysts is dramatically improved. We believe that our work could be usefully employed for further studies to clarify the mechanism of the in situ combustion behavior of heavy oil for a better impact on the environment.

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Low-temperature combustion behavior of crude oils in porous media under air flow condition for in-situ combustion (ISC) process

Cited by 48 publications

References 35 publications

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

Oxidation of Heavy Oil Using Oil-Dispersed Transition Metal Acetylacetonate Catalysts for Enhanced Oil Recovery

Petroleum Coke Combustion in Fixed Fluidized Bed Mode in the Presence of Metal Catalysts

Effect of Ligand Structure on the Kinetics of Heavy Oil Oxidation: Toward Biobased Oil-Soluble Catalytic Systems for Enhanced Oil Recovery

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