Abstract: Ni–La/γ-Al2O3·SiO2 catalysts with different La contents were prepared，and the structure and surface characteristics of the catalyst were measured with XRD，TPR，and XPS. It was revealed that Ni was dispersed well in the catalyst by addition of La. The effects of water/ethanol ratio and reaction temperature on the catalytic performance of Ni-La/γ-Al2O3·SiO2 (5%La) catalyst were studied，and it was found that when water/ethanol molar ratio was 4.0，hydrogen selectivity over Ni-La/γ-Al2O3·SiO2 (5%La) increased to 99.0% at 650℃，in particular CO selectivity was as low as 0.7% at 400℃.
The stability of Ni-La/γ-Al2O3·SiO2 (5%La) catalyst with on-stream time was examined at T=400℃，LSHV=8mL/g·h，n(water)/n(ethanol)=4.0，and it was found that no ethylene was detected and hydrogen selectivity remained at about 67.2% and the total amount of carbon deposition was calculated as only 8.6 mg/(gcat·h) in the ethanol steam reforming reaction system during the whole 100 h stability test.