The water-gas shift reaction for hydrogen production from coke oven gas over Cu/ZnO/Al2O3 catalyst

Abstract A study of H 2 -rich syngas derived from coke oven gas for hydrogen production on Cu/ZnO/Al 2 O 3 catalyst has been performed by water-gas shift reaction (WGSR). The theoretical thermodynamic equilibrium on the reaction temperature, steam/carbon (S/C) ratio and the high amount of H 2 and CH 4 in the syngas have been considered in this work. From theoretical calculations and experiment results, it can be seen that the catalyst Cu/ZnO/Al 2 O 3 can effectively and selectively transform H 2 O and CO to H 2 and CO 2 under an atmosphere of 2.5 vol.% CH 4 and 75.0 vol.% H 2 . The high catalytic activity is closely correlated with the strong structural interaction of aurichalcite and hydrotalcite phases. Moreover, the thermal stability of the Cu/ZnO/Al 2 O 3 catalyst was also studied by calcining at different temperatures. No obvious decrease in CO conversion was detected, suggesting that the catalyst had high heat-resisting ability due to the enhancement of the synergistic interaction in structural precursors.

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