Comparative Kinetic Study on Heavy Oil Oxidation in the Presence of Nickel Tallate and Cobalt Tallate

Abstract

A remarkable feature of heavy oil oxidation during the in situ combustion process is the difficulty in maintaining combustion front to flow throughout the reservoir. Recent developments suggest the use of catalysts regarding this issue. Previous works have been limited by the catalyst choice. Moreover, many research works have failed to provide a catalyst that meets the requirements of efficiency, low-cost, and positive impact on the surrounding. This paper presents new type of catalysts based on tallate, each combined with nickel and cobalt, respectively, as highly efficient catalysts for the oxidation of heavy oil. We have compared the effect of each catalyst using differential scanning calorimetry to highlight kinetic parameters of each process by the Kissinger method. In addition, we employed thermogravimetric analysis and scanning electron microscopy to investigate the behavior of catalysts during the process. The obtained results showed a similar high efficiency of both precatalysts by decreasing the activation energy of the high-temperature oxidation region, increasing the preexponential factors of both high- and low-temperature oxidation regions, and increasing their reaction rate constants. Moreover, the precatalysts used transformed in situ to nanoparticles during the heavy oil oxidation process.

The Oil-Bearing Strata of Permian Deposits of the Ashal’cha Oil Field Depending on the Content, Composition, and Thermal Effects of Organic Matter Oxidation in the Rocks

“…For the successful implementation of thermal and steam-thermal effects on the formation, it is necessary to know and determine the thermal effects caused by the material composition of the rocks and to be able to determine and select the optimal conditions for the implementation of technological processes of influence on the formation, namely, temperature and pressure. To solve these problems, thermal methods are used, in particular, thermogravimetry and differential scanning calorimetry (TG/DSC) [23,34,[43][44][45][46][47][48][49][50][51].…”

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

“…A low activation energy value and a high pre-exponential factor in the presence of OSC3 imply its higher oxidation rate constant. It is well known that the activation energy and the pre-exponential factors are inversely proportional to the reaction rate values. − Activation energy dependency on conversion degree obtained by Friedman analysis and the KAS method is shown in Figure .…”

“…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. In addition, their high heat transfer coefficient can increase the efficiency of thermal oil recovery processes .…”

“…Khelkhal et al showed an acceptable effect of copper-manganese tallates in stabilizing the combustion flame front during oxidation reactions at high temperatures by means of thermal analysis . 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 .…”

Evaluation of the aquathermolysis catalyst effect on the composition and properties of high-viscosity oil from the Strelovskoe field

“…Therefore, scientific research to develop new technologies for the conditioning of high viscosity oils and natural bitumen for processing and transportation plays an important role in the development of high viscosity oils [8][9][10][11][12].…”