Alternative Enery Enterprises (Correction)
Following
is a correction to the October newsletter article Alternative Energy
Enterprises in which Diana Roberts wrote “the main drawback
to biodiesel is that it gels at 54 0F”.
Actually, the cloud point and cold flow
plug point for biodiesel are dependent upon the type of feedstock (oil
source) used. For instance,
if tallow is used as the feedstock for biodiesel, then the cloud point
would be much higher, since tallow is solid at room temperature. In
practice, the same precautions that are taken with No. 2 diesel in
cold climates are prudent with biodiesel blends, such as blending with
No. 1 diesel or flow modifying additives. It
is probably not a good idea to run 100% biodiesel in a cold climate
unless the vehicle can be parked inside.
The following data are from tests run
on soy methyl esters
Biodiesel
concentration (%)
mixed
with No. 2 diesel
|
Cloud
point (0F)
|
0
|
3
|
10
|
5
|
20
|
7
|
30
|
14
|
50
|
18
|
100
|
32
|
|
|
Source: National
Biodiesel Board web site
· When using blends of B20 or lower, the
cold weather performance of the blend is mostly determined by the diesel
fuel portion.
· Incorporation of blends less than 20%
biodiesel (i.e. B5 or B2) into existing diesel fuel has little or no
effect on the cold flow properties of the finished blend.
Information provided by Barry Tee, Production
Ag Coordinator with the Spokane County Conservation District. Phone
(509) 535-7274.
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