2016 agu knops carbon mineralization
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CarbonMineraliza-on
• Workshop:CarbonMineraliza3on
• 16-18December2016• SanFrancisco• Organizedby:-LawrenceLivermoreNa3onalLaboratory-ColumbiaUniversity-Lamont-DohertyEarthObservatory
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Backgroundmyself• PolKnops• 53years• AppliedPhysics(MSc.Twente)
• Worked@Environmentalprojects, renewableenergy
• KnowOlafSchuiling:>25years• Since7yearsinvolvedinMineraliza3on
– Mineraliza3ongeneral
– Ownprocess(GravityPressureVessel)
CO2: 322,25 ppm
CO2: 403 ppm
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Mineraliza-onreac-on
Olivine: Mg2SiO4 + 2CO2 + 2H2O => 2MgCO3 + Si(OH)4 Mg2SiO4 + 4CO2 + 4H2O => 2Mg2+ + 4HCO3
- + Si(OH)4
[∆H = -239.2 kJ/mol]
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Exothermicreac-onCoal
GaseousCO2
SolidCarbonate
ΔH=11,1MJ/kgCO280%
ΔH=2,7MJ/kgCO220%
“The ground energy state of carbon is a mineral carbonate”
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Weathering
Residual Ores
Ambient
Accelerated
Steelslags / Fly ash - Carbon8 - Carbstone
Olivine - Green Minerals Serpentine: - Mineral Carbonation
Olivine - greenSand Mine tailings
- Academic
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Carbon8
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greenSand
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Agriculturaltests
WageningenAntwerpDutchNIOZCardiff
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UsingOlivine
Assumptions: - Fast reaction required <15 year >40 year - Agitation @ Beach No Tidal / Wave - Particle Size Distribution One size Milled
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Par-cleSizeDistribu-on
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Excelmodel Input: - k-factor - temperature - pH - Particle Size Distribution - time steps
Assumptions: - Shrinking core
Output: - CO2 sequestered - Magnesium release (& Nickel) - Alkalinity
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ResultsgreenSand
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Sand (0-3 mm)
Pebble (2-6 mm)
Based: - pH rainwater - Full contact
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RoyalNetherlandsIns-tuteforSeaResearch
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k-factor from Dr. Francesc Montserrrat (former NIOZ) To be published
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Processintensifica-on
• Chemicalprocess• HighPressure,Hightemperature:
• Enhancedreac3onrate:185°C,40-100barPCO2,1hourresidence3meAddi3ves(i.e.NaHCO3)
• Exothermicbehaviorknown&used
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ED
Reactor
B
A:IncomingmaterialB:DownComertubeC:CO2injec3onD:UpComertubeE:Surroundingcoolingtube
C
A
-TheOlivine(orSerpen3ne)isgrindedoutsidethereactorandfedintothereactor.-CO2isinjectedintotheDownComertube- Effluentmaterialfurthertobedegassed,dewateredandlandfilled/applied- Energyrecovery(dependingonexothermicreac3on)
E
E E
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1200 meter (4000 ft)
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Process
• Reac3onrate:≈10μm/hr• Products:MagnesiteAmorphousSilicaHeat
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Concludingremarks
• Condi-ons Rate Product• Ambient 0,2-5μm/yr CO2
• Accelerated 10μm/hr Minerals
Txs:Cives(Italy)
Sponsoring,Olivinesamples
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More then 50 years of experience in Olivine minerals production