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The Removal of CO2 from Flue Gas by Using MOF/Graphene Hybrid Adsorbents

Pourebrahimi, Sina | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46300 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kazemeini, Mohammad; Ganji, Ensieh; Bozorgzadeh, Hamid Reza
  7. Abstract:
  8. Due to the increase in greenhouse gases in earth’s atmosphere in recent years and its devastating environmental outcomes, there has been an increase in research trying to reduce these gases especially CO2. Flue gas is one of the most important sources of CO2 emission. Among the many techniques of removal, capturing and CO2 separation from flue gas, physical adsorption by a solid adsorbent is considered as a suitable and economic option. Among the solid adsorbent that are used for adsorption of CO2, Metal-Organic frameworks have many interesting features such as high specific surface area and high internal free volume. Among the Metal-Organic frameworks, MIL-53 (Al) and MIL-101 (Cr) are two suitable choices due to their low cost, high adsorption capacity and selectivity. In this work, by changing the lab conditions, we obtain the optimum methods for the synthesis of Metal-Organic frameworks. Then by adding graphene nano-plates to the structure of these materials, we try to improve their internal structural properties. All the synthesized adsorbents have been tested in adsorption process of CO2 from flue gas mixture at three temperatures of 25, 50 and 75 and within the absolute pressure range from 0 to 40 bars. The obtained results show that by adding graphene nano-plates to Metal-Organic frameworks, their adsorption and selectivity increases
  9. Keywords:
  10. Graphene ; Flue Gas ; Carbon Dioxide Capture ; Metal-Organic Framework ; Hybrid Adsorbents

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