public workshop to discuss the need for amendments to the alternative fuels regulations regarding...

Public Workshop to Discuss the Public Workshop to Discuss the Need for Amendments to the Need for Amendments to the Alternative Fuels Regulations Alternative Fuels Regulations

Regarding Motor Vehicle LPG & Regarding Motor Vehicle LPG & CNGCNG

June 21, 2000June 21, 2000

California Environmental Protection Agency

Air Resources Board

OverviewOverview

BackgroundBackground LPG IssuesLPG Issues CNG IssuesCNG Issues Draft ConceptsDraft Concepts Future ActivitiesFuture Activities

Alternative Fuels RegulationsAlternative Fuels Regulations

Title 13, CCR, sections 2290-2292 Title 13, CCR, sections 2290-2292 originally adopted in 1992originally adopted in 1992

Provides engine manufacturers with a Provides engine manufacturers with a known fuel quality for designing enginesknown fuel quality for designing engines

Ensures consistent fuel quality to prevent Ensures consistent fuel quality to prevent engine performance problems and excess engine performance problems and excess emissionsemissions

BackgroundBackground

Propane (min.) Propane (min.) 85 vol%85 vol%Propene (max.)Propene (max.) 10.0 vol%10.0 vol%Pentenes +heavier (max.)Pentenes +heavier (max.) 0.5 vol%0.5 vol%Butene (max.)Butene (max.) 2.0 max%2.0 max%Vapor Pressure (max.) Vapor Pressure (max.) 208 psig208 psigVolatility Residue: (max.)Volatility Residue: (max.)

- Evap. Temp, 95% - Evap. Temp, 95% -37-37ooF, orF, or- Butanes - Butanes 5.0 vol%5.0 vol%

Residual Matter:Residual Matter:- Residue on evap. of- Residue on evap. of 0.05 ml0.05 ml100 ml on oil stain obs.100 ml on oil stain obs.

Sulfur (max.) Sulfur (max.) 80 ppmw80 ppmwWater, Corrosion, OdorantWater, Corrosion, Odorant

Motor Vehicle LPG Motor Vehicle LPG Specifications Specifications


Motor Vehicle CNG Motor Vehicle CNG Specifications Specifications

Methane (min.) Methane (min.) 88 mol%88 mol%Ethane (max.) Ethane (max.) 6 mol%6 mol%C3+higher (max.)C3+higher (max.) 3 mol%3 mol%C6+higher (max.) C6+higher (max.) 0.2 mol%0.2 mol%

HydrogenHydrogen 0.1 mol%0.1 mol%Carbon DioxideCarbon Dioxide 0.1 mol%0.1 mol%OxygenOxygen 1.0 mol%1.0 mol%Inert Gases Inert Gases 1.5 - 4.5 mol%1.5 - 4.5 mol%Sulfur (max.) Sulfur (max.) 16 ppmv16 ppmvWater, Particulates, OdorantWater, Particulates, Odorant

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LPG IssuesLPG Issues

Limited Northern CA. availability of LPG meeting the MV fuel Limited Northern CA. availability of LPG meeting the MV fuel specificationsspecifications– Production- Refinery by-product, commercial vs. MVgradeProduction- Refinery by-product, commercial vs. MVgrade

– Distribution- No segregated system to handle two fuelsDistribution- No segregated system to handle two fuels

Limited supplies of MV LPG may affect the use of existing and siting of Limited supplies of MV LPG may affect the use of existing and siting of new LPG fleets new LPG fleets

Transport/delivery trucks are fueled on the same LPG they carry as productTransport/delivery trucks are fueled on the same LPG they carry as product Safety concern with use of ASTM D 2784-89 to determine sulfur content of Safety concern with use of ASTM D 2784-89 to determine sulfur content of

LPGLPG

CNG IssuesCNG Issues Limited availability of CNG meeting the MV fuel specifications Limited availability of CNG meeting the MV fuel specifications

in parts of San Joaquin Valley and South Central Coastin parts of San Joaquin Valley and South Central Coast– Production- Associated gas/oil production; Production- Associated gas/oil production;

commercial vs. MV gradecommercial vs. MV grade– Distribution- No segregated distribution system to handle two fuelsDistribution- No segregated distribution system to handle two fuels

CNG associated with oil production contains ethane in excess of 6 CNG associated with oil production contains ethane in excess of 6 mol%mol%

CNG fueling stations must blend to comply with CNG MV fuel CNG fueling stations must blend to comply with CNG MV fuel specsspecs

No new CNG fueling stations in these areas limit the siting of new No new CNG fueling stations in these areas limit the siting of new CNG fleetsCNG fleets

Draft ConceptsDraft Concepts

Evaluate captured fleet exemption for CNG Evaluate captured fleet exemption for CNG & LPG& LPG

Consider LPG delivery truck exemptionConsider LPG delivery truck exemption Consider an alternative LPG sulfur test Consider an alternative LPG sulfur test

method(s)method(s)

Captured Fleet Exemption Captured Fleet Exemption ConsiderationsConsiderations

Engine durability, performance, Engine durability, performance, emissionsemissions

LiabilityLiability MisfuelingMisfueling Fleet Management & RecordkeepingFleet Management & Recordkeeping Duration of exemptionDuration of exemption


Captured Fleet ExemptionCaptured Fleet Exemption Limited geographic applicabilityLimited geographic applicability

Applies only to commercial fleets w/central fueling facilitiesApplies only to commercial fleets w/central fueling facilities Fleet owner uses off-spec fuel at own riskFleet owner uses off-spec fuel at own risk

– Memorandum of understanding between fuel supplier, fleet owner Memorandum of understanding between fuel supplier, fleet owner & engine manufacturer& engine manufacturer

Fleet owner to safeguard against misfuelingFleet owner to safeguard against misfueling Fleet owner must maintain recordsFleet owner must maintain records Sunset provisionSunset provision


Unavailability of complying MV LPG/CNG Unavailability of complying MV LPG/CNG at publicly accessible fueling locationsat publicly accessible fueling locations

– Consider requirement to maintain current Consider requirement to maintain current supplies of complying fuel for public access supplies of complying fuel for public access vehiclesvehicles

Captured Fleet ExemptionCaptured Fleet ExemptionPotential ConcernPotential Concern


Consider LPG delivery truck exemptionConsider LPG delivery truck exemption– Permanent vs. temporaryPermanent vs. temporary

Consider alternative LPG sulfur detection Consider alternative LPG sulfur detection test method(s)test method(s)– Demonstrate stringency to 80 ppmw sulfur limitDemonstrate stringency to 80 ppmw sulfur limit– Reproducibility and acccuracy to ASTM D 2784Reproducibility and acccuracy to ASTM D 2784

Other AmendmentsOther Amendments


Future ActivitiesFuture Activities

Work with stakeholders to fully develop Work with stakeholders to fully develop appropriate conceptsappropriate concepts

Next workshop planned for late July 2000Next workshop planned for late July 2000 Tentative Board hearing scheduled for Tentative Board hearing scheduled for

October 2000 October 2000

public workshop to discuss the need for amendments to the alternative fuels regulations regarding...

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