8/3/2019 Help and Advice for Adding Coldflow 350

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Help and Advice for adding Coldflow 350

To achieve the lowest pour points ofbiodiesel using Coldflow 350/402 there are a few

basics which must be adhered to allow your fuel to reach low pour points which in turn

will help your biodiesel run through the winter. Coldflow 350 is a biodiesel winter

additive for biodiesel blends made from good quality oils like used cooking oils which

contain less than 10% palm oils or heavy oils. Coldflow 402 is for biodiesels made from

10% or more Palm oils or other heavy oils with poor pour points.

Do not add the Coldflow products to your biodiesel when it is already cold. Thechemistry behind the Coldflow range poisons the sites where crystals are forming in the

fuel and delays this from happening until a much lower temperature has been achieved.

This will not happen if there are crystals currently formed in the fuel as they have

already been formed.

For the best results when adding the Coldflow range the biodiesel must be at least 5 degC above the pour point of the fuel. To gauge the pour point of your fuel its a simple test.

Take a sample of your fuel when produced and leave in a freezer and let it begin to

freeze. As the biodiesel freezes you will see clouding occur which is the beginning of the

crystals forming. At this point take a temperature reading and add 5 deg C. This is the

pour point of your fuel.

Now you have the optimum temperature for your biodiesel to blend the Coldflow intoyour fuel. To achieve the best results you must mix the Coldflows into the fuel very

thoroughly. To do this we recommend either a mixing paddle or a recirculation pump. If

you are using a re-circulation pump we suggest adding the Coldflow to the fuel and re-

circulating for at least 20 minutes to ensure the product has mixed into the solution.

The Coldflow range has a particle size sub 1 micron so will easily pass through 1 micronfilters. We do suggest though that if you are centrifuging your biodiesel after adding the

Coldflow it does have the potential to be removed. So if possible centrifuge the biodiesel

before you add the Coldflows.

Dilution rates, as mentioned earlier we suggest ascertaining the level that you biodieselbegins to gel to achieve a baseline for your fuel. We then recommend running small-

scale lab tests with different dilutions to achieve a level that suits your fuel. Chemiphase

recommends a dilution rate of between 3 & 5 Litres of Coldflows per 1000 Litres of

biodiesel. Try a small-scale 3:1000 Litre sample, a 4:1000 Litre sample and a 5:1000

Litre sample to see the benefits of adding a little bit more. You may find the 5 Litre per

1000 Litres of biodiesel achieves -25 deg C and may be far too high for the Uk. If this is

thee case you may be happier using a 3 Litre per 1000.

If you are blending your biodiesel with mineral diesel the Coldflow range will act as awinter additive for the biodiesel and the mineral diesel.