Carbon capture and storage using

alkaline industrial wastes

Pawan Mallinath Paramashetti

14CH60R29

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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

• References2

Introduction

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• Causes of Global warming & climate change

• How does CO2 affect climate ?

Carbon Sequestration

• Geologic sequestration

• Ocean carbon sequestration

• Industrial use

• Mineral carbon sequestration

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• The process of capture and long-term storage of atmospheric carbon

dioxide

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Mineral carbon sequestration

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Mineral carbon sequestration

• Direct carbonationaccomplished through the reaction of a solid alkaline mineral with CO2

either in the gaseous or aqueous phase

• Indirect carbonationinvolves 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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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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• 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

Mining and mineral processing wastes

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Waste ash

• Asbestos tailing

• Nickel tailings

• Red mud

• Coal fly ash

• Oil shale ash

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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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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• 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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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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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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Thank you for your kind attention…

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