1 fuels workshop california environmental protection agency air resources board may 2, 2005
TRANSCRIPT
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Fuels WorkshopFuels Workshop
California Environmental Protection AgencyCalifornia Environmental Protection Agency
Air Resources BoardAir Resources Board
May 2, 2005May 2, 2005
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AgendaAgenda Introduction Topics (presentation by ARB and Others):
Additives Silver-Corrosion Inhibitors
Gasoline CaRFG3 Predictive Model Update Permeation Emissions Estimate Test Methods CARBOB Model Validation
Diesel Lubricity Biodiesel
Other Topics? Open Discussions Closing Remarks
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Topics:Topics:AdditivesAdditives
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OverviewOverview
The problemThe problem– Fuel Sending Unit FailuresFuel Sending Unit Failures
Actions TakenActions Taken Silver Corrosion InhibitorsSilver Corrosion Inhibitors
Additives
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Fuel Sending Unit FailuresFuel Sending Unit Failures
FailuresFailures– Widespread Failures in the Northeast and Gulf Coast in Widespread Failures in the Northeast and Gulf Coast in
20042004
Failures Caused by CorrosionFailures Caused by Corrosion Corrosion Caused by Elemental Sulfur in GasolineCorrosion Caused by Elemental Sulfur in Gasoline
– Traces of reactive sulfurs (i.e hydrogen sulfide, Traces of reactive sulfurs (i.e hydrogen sulfide, mercaptans) act synergisticallymercaptans) act synergistically
Additives
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Actions TakenActions Taken
ASTM adopted Silver Corrosion Standard and Silver ASTM adopted Silver Corrosion Standard and Silver Strip TestStrip Test
Refineries are examining their operations Refineries are examining their operations Test batches of gasolineTest batches of gasoline
– Additize as necessaryAdditize as necessary– Correct refinery operationsCorrect refinery operations
Improve new fuel sensorsImprove new fuel sensors
Additives
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Silver Corrosion InhibitorsSilver Corrosion Inhibitors
Chemistry/PropertiesChemistry/Properties Treat RatesTreat Rates Causes Engine DepositsCauses Engine Deposits
Additives
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Engine DepositsEngine Deposits
At the maximum recommended dosage rate, At the maximum recommended dosage rate, engine deposits can increaseengine deposits can increase
Adequate levels of detergent additive can Adequate levels of detergent additive can mitigate deposit forming tendency of mitigate deposit forming tendency of corrosion inhibitorscorrosion inhibitors
Additives
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FindingsFindings
Anticipate no problem with the current Anticipate no problem with the current recommended use of silver corrosion recommended use of silver corrosion inhibitorsinhibitors
Refinery use is intermittent Refinery use is intermittent Need to monitorNeed to monitor
Additives
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Proposed ARB Staff AdvisoryProposed ARB Staff Advisory
Monitoring ProgramMonitoring Program Inclusion of Additive in Certification Test FuelInclusion of Additive in Certification Test Fuel
Additives
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Certification Test FuelsCertification Test Fuels
Silver corrosion inhibitor will be a required Silver corrosion inhibitor will be a required component of the certification test fuelcomponent of the certification test fuel
Silver corrosion inhibitor is added at the Silver corrosion inhibitor is added at the maximum recommended treat ratemaximum recommended treat rate
Exception for oil companies not planning to Exception for oil companies not planning to use silver corrosion inhibitorsuse silver corrosion inhibitors
For future gasoline certifications:
Additives
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Topics:Topics:GasolineGasoline
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CaRFG3 Predictive Model UpdateCaRFG3 Predictive Model Update
New Data Set Sources:New Data Set Sources:
Alliance of Automobile ManufacturersAlliance of Automobile Manufacturers
CRC E67 Study conducted by CE-CERT, UC CRC E67 Study conducted by CE-CERT, UC RiversideRiverside
Other ?Other ?
Availability?Availability?
Gasoline
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PermeationPermeation
In 1999, ARB staff learned that ethanol in In 1999, ARB staff learned that ethanol in gasoline increases evaporative emissions gasoline increases evaporative emissions through a process known as permeationthrough a process known as permeation
Permeation is when fuel migrates through the Permeation is when fuel migrates through the soft fuel system found on motor vehiclessoft fuel system found on motor vehicles
At the 1999 Hearing, the Board directed staff At the 1999 Hearing, the Board directed staff to conduct permeation study and report backto conduct permeation study and report back
Gasoline
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Permeation Test ProgramPermeation Test Program In 2002, the CRC and ARB co-funded In 2002, the CRC and ARB co-funded
permeation studypermeation study
Results:Results:– Ethanol fuel higher than MTBE on Ethanol fuel higher than MTBE on allall vehicles and vehicles and
higher than non-oxy on higher than non-oxy on almost allalmost all vehicles vehicles– 65% or 1.4 grams/day more than MTBE gasoline65% or 1.4 grams/day more than MTBE gasoline– 45% or 1.1 grams/day more than non-oxygenated 45% or 1.1 grams/day more than non-oxygenated
gasoline gasoline
Gasoline
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Permeation Emissions IncreasePermeation Emissions Increase Study results do not directly provide the Study results do not directly provide the
emissions impact of permeationemissions impact of permeation
Vehicle activity and fuel temperature data must Vehicle activity and fuel temperature data must be integrated to provide an appropriate temporal be integrated to provide an appropriate temporal and spatial distribution of emissionsand spatial distribution of emissions
Staff receiving public comments on permeation Staff receiving public comments on permeation emissions draft reportemissions draft report
Gasoline
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How to Deal with the Hydrocarbon How to Deal with the Hydrocarbon Emissions Increase from Ethanol Use?Emissions Increase from Ethanol Use? Hydrocarbon emissions increase well into the Hydrocarbon emissions increase well into the
foreseeable futureforeseeable future– New vehicle standards helpNew vehicle standards help– Slow turn over of fleetSlow turn over of fleet
Report back to the Board later this yearReport back to the Board later this year– Better estimate of ethanol permeation impact on Better estimate of ethanol permeation impact on
emissionsemissions– Measures to mitigate the impactMeasures to mitigate the impact
Gasoline
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What’s NextWhat’s Next
The CRC is proceeding with a second stage The CRC is proceeding with a second stage of the test programof the test program
Two additional vehicles: LEV II and PZEVTwo additional vehicles: LEV II and PZEV
Two additional fuels: 10% ethanol and a Two additional fuels: 10% ethanol and a higher aromatics fuelhigher aromatics fuel
E-85 will also be tested on an flexible fueled E-85 will also be tested on an flexible fueled vehiclevehicle
Gasoline
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Test MethodsTest Methods
Gasoline
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CARBOB Model ValidationCARBOB Model Validation
CARBOB regulation approved by Board April 25, CARBOB regulation approved by Board April 25, 20012001
CARBOB regulation allows refiners to certify CARBOB regulation allows refiners to certify blends without having to do hand blends of ethanolblends without having to do hand blends of ethanol
The Board directed staff to validate the CARBOB The Board directed staff to validate the CARBOB model using Phase 3 RFGmodel using Phase 3 RFG
Refiners have submitted their dataRefiners have submitted their data Expect work to be finished by the end of the Expect work to be finished by the end of the
summersummer
Gasoline
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Measured vs. Predicted T50Measured vs. Predicted T50
150
160
170
180
190
200
210
220
230
150 160 170 180 190 200 210 220 230
CARBOB Model Predicted T50 (F)
Ble
nd
T5
0 (
F)
Gasoline
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Topics:Topics:DieselDiesel
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Other Topics?Other Topics?
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Open DiscussionsOpen Discussions
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Closing RemarksClosing Remarks