Re: First winter with bio Diesel

Posted by moresmoke on January 31, 2019 at 17:51:21 from (216.196.78.94):

In Reply to: First winter with bio Diesel posted by David G on January 31, 2019 at 16:06:47:

Got in a debate on another board about a similar issue, here is some information I found on the web from Cenex.

Local Casey’s has had out of service bags on the diesel pumps for a couple weeks now. I assume it won’t pump at these temps.

Understanding Cloud Point and CFPP (cold filter plugging point)

Cloud point
All fuels must be blended 5-10 degrees above cloud (fuel temp not air temp)
Significant variation between fuels
Typical #2 cloud pt – 6 – 14 degrees F
Use pipeline spec as baseline

CFPP
Usually within a degree or two of cloud point in an unadditized fuel

Winter Fuel Blend Chart
#2 Diesel Fuel, Ruby Fieldmaster™ & Cenex Roadmaster XL™

Product CFPP* w/o Cold Flow Additive CFPP* With Cold Flow Additive
100% X or D grade +10°F -3°F
90% X or D + 10% #1 +7°F -6°F
80% X or D + 20% #1 +4°F -9°F
70% X or D + 30% #1 +1°F -12°F
60% X or D + 40% #1 -2°F -15°F
50% X or D + 50% #1 -5°F -18°F
40% X or D + 60% #1 -8°F -21°F
30% X or D + 70% #1 -11°F -24°F
20% X or D + 80% #1 -14°F -27°F

Note: This chart is for guideline purposes only. Diesel fuel low temperature characteristics may vary substantially from one source to another and this chart assumes the product meets typical specifications.
*CFPP (Cold Filter Plugging Point) is the temperature at which wax crystals will plug a fuel filter.

WINTER BLENDING WITH BIODIESEL
• Blending of neat biodiesel (B100) with petroleum diesel should occur when both product are 40 degrees F or above.
• Low blends (B2 or B5) typically have very similar (within 0 to 5 degrees) Cloud Point and CFPP characteristics to conventional diesel products and can be treated in a similar fashion #1 blends, Winter Aid III additives, or both.
• Animal fat or higher level soy blends may increase the CFPP of the fuel as much as 5 degrees for every 10% of B100 used.

Impact of #1 Fuel

#1 fuel typically has a very low cloud point
(-40 to -70F)

#1 blended with #2
reduces the cloud point and CFPP of the blend

“Rule of Thumb”
Adding 10%-#1 will decrease the cloud point by approximately 2 degrees

#1 when blended with 5% or greater with biodiesel will have a negative effect on the cloud point

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