awri water in oil sands research · relave stability of metalloporphyrins class
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AWRI Water in Oil Sands Research Alexander J.B. Zehnder, AWRI Scien6fic Director
AspartofAlbertaInnovates‐‐EnergyandEnvironmentSolu:ons,theAWRIfundsandleadsscienceandresearchtohelpfulfillthegoalsofWaterforLife:• Safe,securedrinkingwatersupply,• Healthyaqua:cecosystems,and• Reliable,qualitywatersuppliesforasustainableeconomy.
ThegoalsforAWRIare:• toservesasaknowledgebroker• toprovideanalysisandcontexttowaterresearch
fordecision‐makers, policy‐makers, watermanagementprac::oners,
• toensuringunderstandable,relevantandaccessibleinforma:on
DILUENT
DEOILING
WATERRECYCLE
STEAMGENERATION
OIL/WATERSEPARATION
Atomic/molecular level
Engineered processes Process
understanding
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• MoleculardynamicsofAsphalteneaggrega:on• Interac:onbetweenbitumen,organic,andclaysurfaces
• Deposi:onofcolloids(fouling).• Membranefouling• De‐emulsifica:on
Uniformchannelsofapproximately3Åarepresent
ZeoliteMembrane
H2O
Hydrocarbons Salts (Ca++, Mg++ etc.) H2O
Hydrocarbons Salts
Molecular sieving of water
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Highpressureandhightemperaturecross‐flowmembraneprocessforSAGDwaterTreatment
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0
0.4
0.8
1.2
1.6
2
95
96
97
98
99
100
25 50 75 Water flux (k
g/m2.h)
Toluen
e removal (%
)
Temperature (oC) Toluene removal
Water flux
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
98
98.4
98.8
99.2
99.6
100
0 40 80 150
Water flux (k
g/m2.h)
Toluen
e removal (%
)
Feed side pressure (Psig) Toluene removal
Water flux
25oC
FromStevenKuznicki
SyncrudeTailingsPond,FutureSiteofBase‐MineLake(2012)
Dr. J MarYn Project Lead Jon.mar:[email protected]
Dr. M Belosevic Dr. M Gamal El‐Din Dr. J Giesy Dr. T Gan Dr. XC Le Team Lead [email protected]
Environmental Chemistry
Mammalian Toxicology
Advanced Oxida:on
Aqua:c Toxicology
Environmental Modeling
Environmental Chemistry
MulYdisciplinary Team of Experts
OSPW Ozona:on and Analysis
hcp://www.usask.ca/water/majorprojects.php
• NAsefficientlyremoved • MajorbyproductsarealreadypresentnaturallyinOSPW• MostpersistentNAspreferen:allyremoved
• Toxicitytomicroorganismsdecreases • Toxicitytoinvertebratesdecreases • Theendocrine disrupYng acYvity ofOSPWdecreases • Natural biodegradaYon and bioremediaYon increase aferozona:on• Newanaly:calmethodsprovidefingerprin:ngtoolformonitoringtheAthabasca
From:J.Mar:n,M.Belosevic,M.GamalEl‐Din,J.Giesy,T.Gan&XCLe
– VanadiumcontentinAthabascaOilSandsis~600μg/g(ppm)– VanadiumleachesfromcokeasbothV(V)andV(IV)– V(V)ispredominantspeciesinOSPW– Toxicityofvanadiumspecies:V(V)>V(IV)>V(III)
From:J.Mar:n,M.Belosevic,M.GamalEl‐Din,J.Giesy,T.Gan&XCLe
2500
2000
1500
1000
500
SignalIntensity
(cps)
6543210
Reten:on:me(min)
V(III) V(IV)
V(V) ‐
EDTAcomplexesofV(III)and(IV)areseparatedfromV(V)species.
From:J.Mar:n,M.Belosevic,M.GamalEl‐Din,J.Giesy,T.Gan&XCLe
rela:vestabilityofmetalloporphyrins
Class I Al, Pd, V
Class IV Mg, Mn, Pb
Class III Fe, In, Zn
Class II Co, Cu, Ni
Class V Ca, Sr, Ba
FromManouchehrAminiet al. 2007
As OH OH
OH O
As OH OH
OH As OH OH
O CH 3
As OH OH
CH 3 As OH O
CH 3 CH 3
As OH CH 3 CH 3
As O
CH 3 CH 3
CH 3 As CH 3 CH 3
CH 3
2 e - CH 3 +
2 e - 2 e - CH 3 +
CH 3 +
2 e -
As V As III MMAV
D MA V MMAIII D MA III
TM AO V T MA III
Adaptedfrom:J.Mar:n,M.Belosevic,M.GamalEl‐Din,J.Giesy,T.Gan&XCLe
forming mobile As
volaYlizaYon & detoxificaYon
Fe3+H2As5+O4
Fe3+H2As3+O3
Fe2+ +H2As3+O3‐
2e‐
1e‐
fromorganicmacer
fromorganicmacer
15
Seclingofsolids Recoveryofporewater
16
Conven:onalDe‐oiling
ThermalWaterRecycle
O/WSepara:on
SteamGenera:on
FWKOProduc:onfrom
wellpads80:20water/oil
emulsion
Treater
DilbitSales$/Bbl
Sludgetodisposal
SkimTank
SlopOilTank
IGFWSF
Sofened,brackishmake‐upwater
BFWTank
OTSG
99%steam
qualitytowellpads
DiluentTank
Evaporator
Crystalizer
RO
SuccessFactors:
Robust&reliable
Minimizedown:me
Stabilityat85‐90°C
UFde‐oilingflux
BFWsilicareduc:on
Impact(30,000bopd):
40%Evapenergy↓($1.8MM/yr.)
20%Capex↓($6MM)
40%↓CO2(68,000t/yr)
Reducedrisk‐mul:barriertooil
Improvedprocessreliability
DesiredOutcomes(GreenFieldExample)
1.DeoilingFieldPilot
2.ReverseOsmosisMembranePilot
3.CombinedDemonstra:onPlant
From100‐1000ppmoilcontent@850C
To<1ppmoilcontent
2009 2010 2011 2012
TechSelec:on
RecruitIndustryPartner
FEED DD
Build
Operate
On‐goingResearch
Build
DD
Operate
DD
Build
Operate
AWRIAgreement
PartnerAgreement
Deoiling Pilot
PreconcentraYon Pilot
DemonstraYon Plant
What about the groundwater?
1. SADG my mobilize arsenic through abioYc reducYon.
3. Vanadium porphyrinate complexes may be mobilized by the reducYon of viscosity. Lifle is known about their toxicity, since most studies where based on uptake of dust through the lung.
3. AcidificaYon through CSS may decrease the binding between iron oxides and arsenate but will also decrease the reacYvity of iron as redox mediator.
Conclusion: Close monitoring of the SAGD and CSS sites will reduce the risks and will allow to implement remedial measures if needed.
Thankyouverymuchforyouracen:on!