In the described case, the dust and ash particles are removed in a product gas filter. A scrubber with packed bed was used to clean the product gas from the tar components. The solvent of the scrubber was RME (rapeseed methyl ester), a biodiesel. RME is used because of its good tar separating characteristics. To investigate these tar separation characteristics of RME and the separation efficiency of the scrubber, four enrichment experiments were carried out during this work. These experiments took place at the 'Technikum' nearby the biomass steam gasification plant Güssing. There, a pilot-scale scrubber and product gas from the gasification plant were used to perform the enrichment experiments. The four experiments are long term experiments with duration of approximately 120 hours each to obtain comparable results, it is necessary to make sure most of parameters are constant during the experiments. ^Only the RME temperature was changed from 0C in the first experiment to 40C in the last experiment. The task of this master thesis was to investigate the removal efficiency of the scrubber for the tar components benzene, toluene and xylene from the gas. During the enrichment experiments, a continuing data recording was fulfilled and in addition discontinuous tar sampling was accomplished. The discontinuous tar samples were taken 0:15h, 1h, 5h, 25h, 120h after the start of the experiments. The tar samples were analyzed in a laboratory and the results give the opportunity to evaluate the efficiency of the scrubber to eliminate benzene, toluene and xylene from the product gas. Using an exponential model, the results were fitted as scrubber efficiency as function of dry product gas volume at standard pressure and temperature. ^The results give good information about the behavior of toluene and xylene, because they show a good correlation between the temperature of RME and the separation efficiency. The results of benzene do not show this clear correlation. The results show, that, if fresh RME is used, a very good, nearly 100% tar separation is possible. Comparing the results to the CHP's scrubber, it can be concluded, that only a very little fraction of the tar components, which were investigated in this work, are actually removed there.