Oxidation characteristics of heavy crude oil in ignition process
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Yi-fei LIU
Abstract:
The ignition process has a significant influence on the success of in-situ combustion at heavy oil reservoirs. During this process, oxidation reactions between crude oil and injected air mainly occurred. In this paper, a series of oxidation experiments were performed at different reaction temperatures and air-oil ratios to investigate the heavy oil oxidation characteristics at different stages of the ignition process. The results revealed that heat release and production of CO and CO2 were observed during the entire oxidation process, while transformation of heavy components (resins and asphaltenes) in crude oil to light components (saturates and aromatics) and production of H2S occurred at higher temperatures. The heavy oil oxidation in ignition process can be divided into three stages based on physical and chemical characteristics of the reaction, they are low-temperature oxidation, pseudo-high temperature oxidation, and high temperature oxidation, respectively.
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- An overview on heterogeneous Fenton and photoFenton reactions using zerovalent iron materials
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