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CN4218 Presentation

CN4218 Presentation. Kong Ming Hao, Samuel Lim Pek Liang Arnol Ting Alvin James Yeo Zhanrong Dennis James. Introduction. Group Members: Kong Ming Hao, Samuel Lim Pek Liang Arnol Ting Alvin James Yeo Zhanrong Dennis James. Presentation Overview. Review of.

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CN4218 Presentation

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  1. CN4218 Presentation Kong Ming Hao, SamuelLim Pek Liang ArnolTing Alvin JamesYeo Zhanrong Dennis James

  2. Introduction Group Members: Kong Ming Hao, SamuelLim Pek Liang ArnolTing Alvin JamesYeo Zhanrong Dennis James

  3. Presentation Overview Review of Proposing a method of hydrogen production via CaO sorption enhanced anaerobic gasification of sawdust in a bubbling fluidised bed. Long Han, Qinhui Wang*, Yukun Yang, Chunjiang Yu, Mengxiang Fang, Zhongyang Luo, International Journal of Hydrogen Energy 36 (2011) 4820-4829

  4. Established Main Process Presentation Overview CO2 gas #1.CaCO3+other gases + deactivated CaO Calcination CaCO3 ->CaO Gasification -Produce H2 rich syngas -Vary Ops Parameters & Feed Ratios Waste Ash/Tar #2 Convert Bottom Ash/Char into CaO CaO Steam Ash #3 Fresh CaO -From dolomite/ calcite/limestone? Biomass -Type of Biomass

  5. Theoretical Background-CaO

  6. Theoretical Background-Fluidised Bed • Feedstock rapidly mixed well with the bed material and quickly heated up to uniform fluidised bed zone T0C-> Good solid-gas mixing, excellent heat transfer, high reaction rates • No distinct reaction zones unlike fixed bed. Easy to control uniform T0C & operate reactor. • Can handle variety of feedstock composition, can use catalysts • Low tar production & excellent scale-up potential

  7. Summary of Research Paper Propose the use of hydrogen as fuel • Current methods of manufacturing Hydrogen • Steam Methane Reforming • Propose the of fluidised bed reactor industrially • Observe the yield of Hydrogen when conditions were varied • Increasing CaO to Carbon Ratio • Increasing Steam to Carbon Ratio • Increasing Temperature

  8. Summary of Research Paper Hydrogen yield with increasing CaO to carbon ratio

  9. Summary of Research Paper Hydrogen yield with increasing Steam to carbon ratio

  10. Summary of Research Paper Hydrogen yield with increasing temperature

  11. Comparing with other Research Papers • Varying CaO to Carbon Ratio • Varying Steam to Carbon Ratio • Increasing Temperature

  12. Comparing Temperatures Hydrogen yield with increasing temperatures

  13. Comparing Steam to Carbon Ratio Hydrogen yield with increasing steam to carbon ratio

  14. Comparing Steam to Carbon Ratio Hydrogen yield with increasing steam to carbon ratio

  15. Comparing CaO to Carbon Ratio Hydrogen yield with increasing CaO/C ratio

  16. Challenges + Improvements CaO Deactivation Particle Attrition Wastage of CaCO3

  17. Chemical Looping Gasification Chemical Looping Gasification Gasifier (Carbonation): CaO + CO2 ->CaCO3 Regenerator (Calcination): CaCO3 ->CaO + CO2

  18. Calcination through CuO Reduction with Methane CuO added into gasification process Exothermic reduction provides heat for calcination CaO and CuO retain good stability

  19. Sol-Gel Enhancement of Particles CaCO3 has a low Tammann Temperature → Sintering Produce materials supported on High Tammann Temperature substances Higher CO2 uptake

  20. CLG is still not perfect... High Temperature → High Cost of Production Complex → High Cost of Production Undesirable Ca(OH)2 formed There is still potential for CaO to be explored!

  21. Thank you! Questions?

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