Application of the newest method based on infrared spectra analysis and mathematical models for estimating an effect of biocomponent share in a mixture with diesel oil on cetane number

The paper presents results of tests obtained by application of new method based on an analysis of infrared spectra and mathematical models for determining the cetane number of fuels and biofuels. The research aimed at estimating the effect of biocomponent share in a mixture with diesel oil on the cetane number. The tests were conducted on two various commercial diesel oils and one RME biofuel. Values of cetane numbers ranged between 51.8 for basic diesel oil and 55.2 for type B40 biofuel, i.e. diesel oil with 40% supplement of RME. Growing share of biocomponents caused an increase in the fuel cetane number, while at 40% addition the CN increased maximally by 5.8%.