Carbon Sequestration using industrial alkaline waste.

1. Carbon capture and storage using
alkaline industrial wastes
Pawan Mallinath Paramashetti
14CH60R29
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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
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3. Introduction
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• Causes of Global warming & climate change
• How does CO2 affect climate ?

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
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6. Mineral carbon sequestration
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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.
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10. Waste products for mineral carbonation
• Steel making slags
• Mining and mineral processing wastes
• Waste ash
• Alkaline paper mill waste
• Cement wastes
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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)
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Steel making slag

12. Mining and mineral processing wastes
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• Asbestos tailing
• Nickel tailings
• Red mud
Waste ash
• Coal fly ash
• Oil shale ash

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.
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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
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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.
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Carbonation Reaction using batch reactor

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Results

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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
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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
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20. Thank you for your kind attention…
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