LAUSR

In this study, a packed-bed dielectric barrier discharge reactor was built for the removal of biomass gasification tar. Two kinds of packing materials, glass pellets and a Ni/γ-Al2O3 catalyst, were employed for the plasma-alone process and the plasma catalytic process, respectively. Toluene was used as the tar surrogate, and five typical gas combinations, N2, N2 + CO2, N2 + CO2 + CO, N2 + CO + H2, and simulated gasification gas (SGG), were selected as carrier gases. The effects of the main components of the gasification gas on toluene removal under plasma and/or catalysis treatment were studied. The results indicated that the highest removal efficiency in the plasma-alone process was achieved in the N2 atmosphere, and the addition of H2, CO, or CO2 to N2 led to a decrease in the removal performance. When Ni/γ-Al2O3 was introduced into the plasma process, the best removal efficiency was obtained in the N2 + CO2 atmosphere. However, the positive effect of CO2 on toluene removal switched to a negative effect...