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EFFECT OF MIXED OXIDE CATALYST ON HEAVY CRUDE OIL OXIDATION PROCESS
Abstract
In-situ combustion (ISC) is considered one of the most effective method to increase oil recovery from heavy oil and bitumen. Oxygen of injected air reacts with the heavy crude oil components, forming a hot zone, in which the oxidation and cracking of heavy fractions occur. It is known that catalysts of various types can significantly improve the processes of oil upgrading and increase the efficiency of thermal tertiary methods of oil production. This work devoted to study the influence of mixed oxide catalyst presence on in situ oxidation processes of crude oil. The heavy crude oil from Ashalchinskoe oil field was studied. Oxidation process at high pressure and high temperature was studied for crude oil at catalyst presence. Nickel and cobalt oxides, as well as their mixed oxides - mixtures of NiO and Co3O4 at different rations - were used as catalysts. The combustion was investigated by accelerating rate calorimetry (ARC). According to the results of the performed ARC experiment, Arrhenius kinetic parameters (reaction rate, activation energy, etc.) were calculated for crude oil. The impact of catalyst on kinetic parameters of oxidation process was found. The effect of mixed oxides compared to their simple analogs on the oxidation of heavy oil is discussed.
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