Presentation on theme: "Industry Priority 1–Biodiesel Quality"— Presentation transcript:
1 Industry Priority 1–Biodiesel Quality November, 2007
2 Questions to ask the Biodiesel Producer Is the Producer BQ-9000 certified?What feedstock is the biodiesel made from?Can I see the last couple C of A’s?Does the biodiesel meet ASTM D B?How is the product being stored?Get samples. Tour Production facility.
3 Agenda-Common Industry Quality Concerns Feedstock IssuesEach oil has different propertiesHigh TG/Fall outMost common filter plugging issueSterol Glucosidespalm and soy basedSolvent PropertiesHoses, gaskets, o-ringsWinter StorageAlso plays a significant role
4 Raw Materials (Oil) Soybean Tallow / Choice White Poultry Palm Sterol glucosidesTocopherol32F Cloud pointTallow / Choice WhiteHigh cetaneNo antioxidantsHigher cloud pointPoultryBetter CP than tallowSulfur concernPalmHigh saturatesHigh cetaneOSI stableRecycledMixed feedstockMust treat fatty acidRapeseed (Canola)Lower C18-3 contentBetter oxidation stab.Not widely available in US
5 Industry Quality Concerns High Total GlycerideSaturate monoglycerides in high concentrations can be problematicCan settle out and may not go back into solutionRequires heat to homogenizeSterol GlucosidesPalm and soy based biodieselWill not go back into solutionBest dealt with during biodiesel production
6 Industry Quality Concerns (cont.) Fatty AcidCan come from producer, or from improper handlingCan indicate aged fuelOxidative StabilityLong term storage with oxygen causes instabilityThe stability of the product will only decrease with timeTreat with additives to stabilize
7 Water IssuesCan come from biodiesel production or from storage/handlingCurrent requirement is 500ppm water & sedimentASTM to include a direct measure of water in 2008
8 Operational Issues Good Solvent Biodiesel cleans out the sludgeFilters can clog on initial use, especially with B20 and higherMechanics report that fuel system repairs are a cleaner job after switching to biodieselResidue can also be pulled off inner tank walls
9 Biodiesel Storage Tank Venting Filtration Periodic Tank Maintenance Ideally water traps to reduce water from humidityAt least keep it from raining into the tankGoose neckFiltrationFilter material exiting the B100 tank.Good check against fallout in the tankIf possible, filter biodiesel as it unloadsCheck on workmanshipPeriodic Tank MaintenanceRegular checks for waterRegular sump sample reviewCheck for flocculent or water
10 Biodiesel Storage (cont.) Cold Weather StorageUninsulated/Above Ground – Store with 50% #1 Diesel and Utilize Cold Flow AdditiveNot recommendedKerosene expensiveUnderground Storage – Should be Sufficient to Keep Product 10°F Above Cloud Point.Utilize cold flow additiveCold blending assistance available at the NBB.ORGAbove Ground/Heated & Insulated – Typical Storage Temperature is 70°F.Inside Storage - > 50°FTank HeatingTempered glycol bestLow pressure steam acceptableRecirculation of agitation suggested to avoid hot spots.
13 Cold Soak Method – Performance Standard Biodiesel heated to 100F to remove any temperature memory effectsBiodiesel cooled (cold soak) at 40F for 16 hoursBiodiesel allowed to return to room temperature (under 2 hours)Filtered through a 0.6 micron glass fiber filterUnder 200 seconds – fit for winter purposeUnder 360 seconds – fit for summer purposeWinter grade for use with diesel - CP of < -12CSummer grade for use with diesel – CP > 12C
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