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Carbon Sequestration

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Carbon Sequestration using industrial alkaline waste.

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Carbon Sequestration

  1. 1. Carbon capture and storage using alkaline industrial wastes Pawan Mallinath Paramashetti 14CH60R29 1
  2. 2. Contents • Introduction • Mineral carbon sequestration • Direct carbonation • Indirect carbonation • Waste products for mineral carbonation • Steel making slag • Mining and mineral processing wastes • Waste ash • Alkaline paper mill waste • Cement wastes • Results • Conclusions • References 2
  3. 3. Introduction 3 • Causes of Global warming & climate change • How does CO2 affect climate ?
  4. 4. Carbon Sequestration • The process of capture and long-term storage of atmospheric carbon dioxide • Geologic sequestration • Ocean carbon sequestration • Industrial use • Mineral carbon sequestration 4
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  6. 6. Mineral carbon sequestration 6
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  8. 8. Mineral carbon sequestration • Direct carbonation accomplished through the reaction of a solid alkaline mineral with CO2 either in the gaseous or aqueous phase • Indirect carbonation involves the extraction of reactive components (Mg2+,Ca2+) from the minerals, using acids or other solvents, followed by the reaction of the extracted components with CO2 in either the gaseous or aqueous phase. 8
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  10. 10. Waste products for mineral carbonation • Steel making slags • Mining and mineral processing wastes • Waste ash • Alkaline paper mill waste • Cement wastes 10
  11. 11. • Produce significant quantities of CO2 and slags • Four main types of slag produced 1.Blast furnace slag 2.Basic oxygen furnace slag 3.Electric arc furnace slag 4.ladle furnace slag • Highly alkaline(pH≈12) • High calcium content (32-52% of CaO) 11 Steel making slag
  12. 12. Mining and mineral processing wastes 12 • Asbestos tailing • Nickel tailings • Red mud Waste ash • Coal fly ash • Oil shale ash
  13. 13. Alkaline paper mill waste • The regeneration of cooking liquor results in the formation of several types of waste • Collectively referred to as alkaline paper mill waste(APMW) • The alkaline nature of waste and their high concentration of CaO make them suitable for mineral carbonation • CO2 is generated at pulp mills in both the recovery boiler and lime kiln. 13
  14. 14. Cement waste • Alkaline waste residues undertaken for the study included – 1.Cement Bag filter dust 2.Finished cement sample 3.Marble dust 4.Baghouse dust 14
  15. 15. • Reaction was conducted in acrylic carbonation reactor • A CO2 cylinder is used to pass CO2 into the carbonation reactor • XRF analysis is to know the extent carbonation. • The effect of different water to solid ratio at constant temperature is observed. • Percentage capture of CO2 is determined. 15 Carbonation Reaction using batch reactor
  16. 16. 16 Results
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  18. 18. Conclusion • Mineral carbon sequestration is the only known form of permanent carbon storage • offers the possibility of carbon capture and storage in a single step • Most cost economic because of no need of pre-treatment • Considerable amount of CO2 can be captured 18
  19. 19. References • Anjali Gupta, Arvind K. Nema / International Journal of Engineering Research and Applications (IJERA) Vol. 2, Issue 6, November- December 2012, pp.075-079 • Erin R. Bobicki, Qingxia Liu, Zhenghe Xu*, Hongbo Zeng / Progress in Energy and Combustion Science 38 (2012) pp.302-320 19
  20. 20. Thank you for your kind attention… 20

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