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Industry Priority 1–Biodiesel Quality

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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 Issues Each oil has different properties High TG/Fall out Most common filter plugging issue Sterol Glucosides palm and soy based Solvent Properties Hoses, gaskets, o-rings Winter Storage Also plays a significant role

4 Raw Materials (Oil) Soybean Tallow / Choice White Poultry Palm
Sterol glucosides Tocopherol 32F Cloud point Tallow / Choice White High cetane No antioxidants Higher cloud point Poultry Better CP than tallow Sulfur concern Palm High saturates High cetane OSI stable Recycled Mixed feedstock Must treat fatty acid Rapeseed (Canola) Lower C18-3 content Better oxidation stab. Not widely available in US

5 Industry Quality Concerns
High Total Glyceride Saturate monoglycerides in high concentrations can be problematic Can settle out and may not go back into solution Requires heat to homogenize Sterol Glucosides Palm and soy based biodiesel Will not go back into solution Best dealt with during biodiesel production

6 Industry Quality Concerns (cont.)
Fatty Acid Can come from producer, or from improper handling Can indicate aged fuel Oxidative Stability Long term storage with oxygen causes instability The stability of the product will only decrease with time Treat with additives to stabilize

7 Water Issues Can come from biodiesel production or from storage/handling Current requirement is 500ppm water & sediment ASTM to include a direct measure of water in 2008

8 Operational Issues Good Solvent
Biodiesel cleans out the sludge Filters can clog on initial use, especially with B20 and higher Mechanics report that fuel system repairs are a cleaner job after switching to biodiesel Residue can also be pulled off inner tank walls

9 Biodiesel Storage Tank Venting Filtration Periodic Tank Maintenance
Ideally water traps to reduce water from humidity At least keep it from raining into the tank Goose neck Filtration Filter material exiting the B100 tank. Good check against fallout in the tank If possible, filter biodiesel as it unloads Check on workmanship Periodic Tank Maintenance Regular checks for water Regular sump sample review Check for flocculent or water

10 Biodiesel Storage (cont.)
Cold Weather Storage Uninsulated/Above Ground – Store with 50% #1 Diesel and Utilize Cold Flow Additive Not recommended Kerosene expensive Underground Storage – Should be Sufficient to Keep Product 10°F Above Cloud Point. Utilize cold flow additive Cold blending assistance available at the NBB.ORG Above Ground/Heated & Insulated – Typical Storage Temperature is 70°F. Inside Storage - > 50°F Tank Heating Tempered glycol best Low pressure steam acceptable Recirculation of agitation suggested to avoid hot spots.

11 Filter Plugging

12 Filter Plugging Sterol Glucosides and Glycerin

13 Cold Soak Method – Performance Standard
Biodiesel heated to 100F to remove any temperature memory effects Biodiesel cooled (cold soak) at 40F for 16 hours Biodiesel allowed to return to room temperature (under 2 hours) Filtered through a 0.6 micron glass fiber filter Under 200 seconds – fit for winter purpose Under 360 seconds – fit for summer purpose Winter grade for use with diesel - CP of < -12C Summer grade for use with diesel – CP > 12C

14 Questions?

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