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REUSE OF SPENT SHALE: A CRITICAL REVIEW
Jaan Habicht Institute of Chemistry, University of Tartu Estonia
Golden 2010
Golden 2010
Terms
- spent shale
- reuse
- recycle
- utilize
- use
REUSE OF SPENT SHALE: A CRITICAL REVIEW Jaan Habicht Institute of - - PowerPoint PPT Presentation
REUSE OF SPENT SHALE: A CRITICAL REVIEW Jaan Habicht Institute of - - PowerPoint PPT Presentation
REUSE OF SPENT SHALE: A CRITICAL REVIEW Jaan Habicht Institute of Chemistry, University of Tartu Estonia Golden 2010 Terms spent shale reuse recycle utilize use Golden 2010 FUTURE PAST PRESENT Golden 2010 According to
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PRESENT PAST
FUTURE
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120 million tons (dw), mostly semicoke According to prognosis 2015: The same amount of retorted oil shale in next 10 years as we have had during 100 years, mostly SHC process residues partly close down old embankments, continue landfilling on the same sites
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Narva Kohtla-Järve Kiviõli
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Kiviõli semi-coke embankments
New landfill “New hill” “Old hill”
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Photo Toomas Volmer
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Kiviõli International Hill-Climb 2010
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Kiviõli International Hill-Climb 2010
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Kohtla –Järve semi-coke embankments
New landfill
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Photo Marko Mumm
Utilization
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2001...2004 60 000 tons of semi-coke in cement production 2000... 40 000 tons semi-coke in soil amendment mixtures
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Make a soil amender mixing semi-coke and peat Get a “fertilizer” that increases crop production Semi-coke? Alkaline hydrolysis of peat Huminic and fulvic acids Total content of phenolics in the leachate increases
Soil amender - fertilizer project
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HASPCO project
Hybrid Aspen – Carbon dioxide capture project
- Make a fertilizer mixing semicoke and pig manure
- Plant hybrid aspen
- Make the carbon dioxide balance of oil shale
processing better
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semi-coke SHC process ash residue Dry matter % (105˚C, 24h) 57-61 (64-67) 80-84 (100) pH of contact water (25˚C) 12,1-12,2 (12,4-12,6) 12,6-12,8 (12,6-12,8) Hexane/ethanol extractable
- rganics g/kg(Soxlet extraction)
3-4 (1-5) 0,3-3 (˂0,5) Total sulfur (as percentage of dry matter) 2,4-2,6 (2,8-2,9) 2,1-2,2 (2,2-2,4) Sulfide 0,3-0,4 (0,6-0,7) 0,2-0,4 (0,4-1,0) Pyrite sulfur 1,2-1,4 (1,2-1,4) 0,8-0,9 (0,8-1,0) Alkalinity (mmol/kg H+) 2700-3000 3700-6700 Pyrolytic char 4-6 (6-8) 2-4 (0,5-2 )
Kohtla-Järve and Kiviõli ()
Comparison of semi-coke and SCH retort process residues
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Conclusions
- There is no real use for retorted oil
shale deposited so far
- Hopefully SHC process residues can
be used
- We see problems when landfilling
SHC process residues
- Enhanced recarbonatization could
help
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Thank you
Golden 2010