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Design and Optimization of Carbon Capture System from Exhaust Gases in the Process Industries

Farshi Taghavi, Mahdis | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52347 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Rashtchian, Davood; Seif, Shayan
  7. Abstract:
  8. Carbon dioxide is one of the main geenhouse gases emitted from factories as well as transportation vehicles that adversely affect the atmosphere and cause global warming. Among the proposed solutions to reduce carbon dioxide in the atmosphere, carbon dioxide separation would be the most viable medium-term approach. However, the high cost of carbon dioxide separation prevents the development of carbon dioxide absorption technologies. Therefore, it seems that integrating separation and production processes is the most efficient way to save energy and reduce carbon emissions. This method decrease a high proportion of the energy consumption in upstream operations (carbon dioxide removal, compression, transport) by direct conversion of output carbon dioxide-rich solvent from the absorption tower to the product. The direct conversion of carbon dioxide-rich solution to the product must either be carried out in water or could tolerate the presence of water or the presence of carbon dioxide separating agent and its degradation products. Hence, the final process may be more difficult and costly than carbon dioxide removal and compression. Therefore, this thesis has attempted to reduce the amount of water in aqueous ammonia solution as much as possible. So that the output carbon dioxide-rich solution from the absorption tower can be used directly to produce urea at high pressure, after carbon dioxide separation from the flue gas using ammonia solvent. Accordingly, by applying the proposed method, the amount of water in aqueous ammonia solution has been reduced to more than 90%. Also, the effect of changes in the urea production process has been investigated. The results show that the proposed process for carbon dioxide removal can reduce the utility cost consumed by up to 45%
  9. Keywords:
  10. Carbon Capture and Storage (CCS)Technology ; Post Combustion ; Aqueous Ammonia Solution ; Global Warming ; Carbon Dioxide Emission ; Greenhouse Gases ; Mitigation

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