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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 43417 (06)
- University: Sharif University of Technology
- Department: Chemical and Petroleum Engineering
- Advisor(s): Badakhshan, Amir; khorashe, Farhad
- Abstract:
- According to global improving consumption of distillate products, like gasoline and diesel, reduction in light petroleum production and growth in exploring and extraction of heavy and sour petroleum, changing in refining structure of worldwide oil refineries is necessary and it is crucial to apply special processes for refining, conversion and cleaning of these heavy and extra-heavy petroleum. Gasification of these fuels, i.e. partial thermal oxidation of feed in the presence of gasifying agent (air, oxygen, steam or mixture of them) in the gasifier, is one of the new ways to convert heavy fuel oil to synthetic gas (syngas), that this gas can be used widely in downstream processes. Here, gasification of heavy fuel oil and its conversion to syngas, is modeled. For this purpose, first, with comparison between model and experimental results, the validation of model is confirmed. Then, effects of some parameters such as type of gasifying agent, equivalence ratio and pressure, are investigated. According to modeling results, it is observed that with increasing the equivalence ratio (i.e. reactions trend toward the combustion reactions) the amount of hydrogen and carbon monoxide reduce and gasifier temperature increase. With increasing the amount of oxygen in oxidant agent, according to nitrogen reduction, hydrogen and carbon monoxide production increase. In steam-gasification processes, the amount of hydrogen production is higher in comparison with steam free state (oxidant agent gasification), but for doing this kind of gasification, the required energy for gasification reactions must be supplied. Up to syngas downstream application, type and amount of gasifying agent differ. Investigation showed that variation of gasifier pressure has no significant effect on gasification properties.
- Keywords:
- Thermodynamic Equilibrium ; Numerical Modeling ; Synthesis Gas ; Gasification Process ; Heavy Fuel Oil
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