Although paraffinic low-GHG diesel fuels comply with the DIN 15940 standard and are thus technically suitable for diesel engines, it is not sufficiently known yet, how they behave in blends with other fuels. The focus is on the solubility behavior and low-temperature properties of the fuels, which can vary depending on the type and origin of the raw material base and the degree to which they are processed (n-paraffinic or iso-paraffinic). If n-paraffins exceed their solubility limit in the fuel mixture and crystallize, the fuel is no longer homogeneous and may no longer be suitable for use. Other influencing factors include temperature changes (e.g. day and night), seasonal differences (summer and winter), and blending components such as the usual biodiesel content of up to 7%. OWI Science4Fuels performs experimental and analytical laboratory tests of different blends and aims to determine and evaluate an alternative fuel parameter to describe solubility.
From the test results, OWI Science4Fuels develops recommendations for action, such as fuel blending rules for fuel manufacturers and distributors. These could also be incorporated into standards as a standardization of defined blends and support the use of diesel fuels with lower greenhouse gas emissions when they enter the market. The operational reliability and performance of the blends could be ensured by additives precisely matched to the fuel.