The catalytic and non-catalytic gasification of cellulose to produce hydrogen and synthesis gas using the Rh/CeO2/SiO2 catalyst were carried out in a continuous-feeding fluidized-bed reactor at ≥ 773 K. The Carbon conversion (C-conv) (26%) and gas formation at 823 K were very low in non-catalytic systems. In this system, combustion reaction mainly proceeded to form CO2 and H2O. At 1173 K, partial oxidation reaction proceeded and CO was formed remarkably. The G-91 catalyst worked better with respect to both C-conv and gas formation at low temperature. It gave 79% and 94% C-conv at 823 and 973 K, respectively. Within the reaction period (25 min), the C-conv to gas and formation of H2, CO, CH4, and CO2 were stable on Rh/CeO2/SiO2 (35), however, on G-91, the C-conv decreased remarkably with time on stream. The C-conv and the selectivity of H2 was improved by the steam addition in the gasification of cellulose on Rh/CeO2/SiO2 (35) catalyst. In the absence of steam, 86% C-conv with a less hydrogen was achieved at 773 K, while the 100% C-conv with the higher hydrogen formation was found when the steam with H2O/C = 0.35:1 was introduced. CH4 combustion activity indicated that the Rh/CeO2/SiO2 (35) catalyst had much higher activity than that of Rh/CeO2, Rh/SiO2, and G-91.
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