**2. Experimental Part**

The aim of the research work was the investigation of quality improvement, mainly the octane number increasing possibilities of C5/C6 bioparaffin fractions by isomerization and the hydrogenation of benzene and oxygenates (e.g., methyl-/ethyl-formate, methyl-acetate, and 2-butanone) in one catalytic step. These light hydrocarbons were obtained as side products by the special hydrocracking of waste cooking oil to hydrocarbons in the boiling range of JET fuels/diesel fuels. The aim of the study was also the determination of favorable process parameters, such as temperature, liquid hourly space velocity, pressure, and hydrogen/feedstock ratio, for the conversion of C5/C6 fractions to hydrocarbons with a high octane number in different catalytic systems. In addition, the activity and selectivity of the two applied catalysts with different composition were compared during the experiments.
