Biodiesel addition in Diesel :
There are some material incompatibility issues with both diesel and biodiesel fuels:
- Brass, Bronze, Copper, Lead, Tin, or Zinc, oxidizes both diesel and biodiesel fuels and creates sediments, which in turn can result in plugged fuel filters.
- Pure biodiesel (B100) or blends higher than B20 cause more problems with rubber seals, gaskets, and hoses – so make sure biodiesel resistant materials are used.
- Biodiesel can create further problems if it is introduced into a storage tank that previously held diesel.
- Diesel tends to form sediments that stick to and accumulate in storage systems, forming layers of sludge or slime – Old system added with poor maintenance, results in thicker sludge accumulation. Biodiesel, being a good cleaning agent, will carry these sediments into the fuel systems of generator engine. Fuel filters will catch most of it, but in severe cases the sediments can rupture the filters and can cause fuel injector failure. B20 generally doesn't create problems as much as higher blends or B100 biodiesel, but tanks should be cleaned before switching to any biodiesel.
- Industry experts recommend that biodiesel meets ASTM D6751 and to be used within six months of manufacture to ensure that the quality of the fuel meets specifications. Fuel degradation routes for biodiesel are more likely with higher concentration blends due to the higher presence of the biodiesel, so stability concerns and issues are likely to be higher and may occur faster as the blend level is increased.
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