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Modeling and Analysis of Combined Heat and Power Production from Heavy Refinery Products, using Integrated Gasification and Molten Carbonate Fuel Cell Cycle

Astaneh, Majid | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46088 (46)
  4. University: Sharif University of Technology
  5. Department: Energy Engineering
  6. Advisor(s): Roshandel, Ramin
  7. Abstract:
  8. Nowadays, the reduction of crude oil quality and the growth of environmental restrictions are the main challenges in oil refineries worldwide. The high demand of lighter refinery products and the shrinking market of the heavy products, highlighted the role of heavy residues conversion technologies.Gasification technology consumes these heavy refinery residues and produces clean syngas. By this way and the integration of gasification with power generation cycles, more value added products such as electrical energy, steam and hydrogen can be provided. For this aim to be achieved, three different scenarios are developed and investigated in this project. The first scenario includes the integration of heavy refinery residue gasification with conventional combined cycle. In the second scenario the exclusive behavior of molten carbonate fuel cell is utilized to reduce the carbon dioxide emission of the first scenario. In the third scenario natural gas is fed to the fuel cell in order to improve the technical performance of the second scenario. Three scenarios are compared to each other from technical, economical and environmental points of view. Generally, the first scenario has the highest electrical efficiency and the lowest levelized cost of electricity. But, from environmental aspect, it has high carbon dioxide emission rate. The second and third scenarios by suffering a very low efficiency penalty, reduce more than 85% of the carbon dioxide emission rate in the first scenario. Because of utilizing fuel cell technology, the second and third scenarios have higher levelized cost of electricity than the first scenario. Also, because of the consumption of natural gas in the fuel cell, the third scenario has the highest levelized cost of electricity among three scenarios. Finally, in order to investigate the effect of different parameters on plant costs and to improve the economic performance of the second and third scenarios sensitivity analysis is performed
  9. Keywords:
  10. Petroleum Residue ; Cogeneration ; Molten Carbonate Fuel Cell ; Carbon Dioxide Separation ; Gasification Process

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