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Carbon Dioxide Recovery From Flue Gases by Means of Appropriate Absorbents

Lotfi Varnoosfaderani, Mohammad | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56139 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Molaei Dehkordi, Asghar
  7. Abstract:
  8. Due to the increasing concentration of greenhouse gases in the earth's atmosphere and their destructive consequences, many scientists and researchers have turned to preventing the emission of greenhouse gases, such as carbon dioxide. One of the primary sources of carbon dioxide emissions is flue gases. Carbon dioxide is one of the most important greenhouse gases, the release of which causes global temperature increase and climate change. One of the options for reducing carbon dioxide emissions from gas streams is using reactive amine solvents, considered the most critical technologies for carbon dioxide removal. The only commercially available carbon dioxide separation method is absorption using amine solutions. This method has shortcomings such as high-energy consumption for solvent recovery, high corrosion of equipment, high loss of solvents due to evaporation, and high rate of solvent degradation in the presence of oxygen. To overcome the disadvantages of this method, an electrochemical process for solvent regeneration was proposed, in which the solvent is regenerated by applying an electric current in an electrochemical cell, and then the regenerated solvent is recycled to the absorption tower. Among the advantages of this method, it can be pointed out that the solvent's non-degradation increases the solvent's recovery efficiency and reduces the size of the absorption tower because of the reduction in the recycled solvent fluid flow. In this work, a two-dimensional dynamic model was developed to investigate the system's behavior. After validating the prediction of the developed model against the experimental data for various electrical potentials, the influences of various operating conditions such as feed flow rate, carbon dioxide flow rate, cell voltage, and copper load on cell performance were investigated carefully
  9. Keywords:
  10. Carbon Dioxide Absorption ; Modeling ; Simulation ; Electrochemical Reduction ; Carbon Dioxide Separation ; Amine Regeneration

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