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Abstract: Gasification of a fuel or biomass is an industrial process utilized for synthesis gas (syngas) production. The syngas can be used to generate electricity, however after gasification it is often polluted with tars and various other pollutants. Therefore, clean-up of the syngas is necessary before its further use. The objective of this paper is to investigate the potential of tars removal by non-thermal plasma generated by atmospheric pressure dielectric barrier discharge in combination with various packing material (TiO2, Pt/γ-Al2O3, γ-Al2O3, glass beads). Naphthalene was used as a model polyaromatic tar compound. The effect of discharge power, carrier gas and packing material on naphthalene removal was investigated and gaseous and solid by-products were analysed by means of the FTIR spectrometry. In ambient air, naphthalene removal efficiency of 88% and 40% for 320 J/L with and without the catalyst was achieved, respectively. The maximum removal efficiency of almost 100% was observed with TiO2 catalyst and with oxygen carrier gas. Among the products CO, CO2, H2O and HCOOH were identified, as well as more complex compounds such as 1,4-naphthoquinone and phthalic anhydride.
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