Biomass gasification is a recognized process that may generate synthesis gas (H2+CO) from renewable resources. During gasification, a complex mixture of condensable hydrocarbons or tar compounds form; this can interfere with downstream utilization technologies and also reduce gasification efficiency. Catalytic tar conversion of these compounds to additional product gas is technically and economically interesting approach to reduce or to eliminate tar in product stream. In this paper, 64% Ni on SiO2-Al2O3 catalyst was used as tar removal catalyst. The catalytic performance of this catalyst was evaluated by the conversion of benzene as a model of tar component using a fixed bed reactor. The process variables including reaction temperature 500, 600 and 700°C, Amount of steam added in the cracking and reforming reactions of 1.44 and 2.88 vol.%. The reactor effluent was analyzed by on-line FTIR for CO, CO2, CH4, and other hydrocarbons. Part of the gas product was collected in sample vials for concurrent analysis by GC. The results indicated that the highest conversion of benzene and superior ratio of [CO] to [CO2] may be obtained from at 700°C reaction temperature and 1.44% volume of H2O where 91.2% conversion and ratio of 18.1 may be obtained, respectively. Generally, the distribution of produced gas was greater than the data predicted by equilibrium calculation according to water-gas shift reaction.

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