Steam Reforming of Benzene As a Model for Biomass-Derived Syngas Tars over Rh-Based Catalysts

The ability of Rh based catalysts to remove Undesired tars from biomass-derived syngas was examined under realistic operating conditions. Experiments were performed in it Fixed bed reactor at temperatures of 650-850 degrees C and atmospheric pressure using C(6)H(6) as S It Model tar compound. Benzene conversion exhibited a strong dependence on temperature and H(2)O concentration in the feed. Significantly better catalyst performance was observed upon addition of Ce to the catalyst, which increased Rh dispersion and Stability. The concentration Of C(6)H(6) in the feed had very little effect on catalyst performance. CO(2), H(2), and CO cofeeds had positive, neutral. and negative effects, respectively, Oil C(6)H(6) conversion. A representative biomass-derived syngas Mixture of N(2), H(2), CO, CO(2), H(2)O, and C(6)H(6) was tested Oil the Rh-Ce catalyst ill 850 degrees and 2 SLPM total flow rate, resulting ill almost complete C(6)H(6) Conversion to a near equilibrium product stream.Energy & FuelsEngineering, ChemicalSCI(E)EI5ARTICLE21341-13462