The impact of preparation methods on the structure and catalytic performance of NiMoO4for oxidative dehydrogenation of propane

The sol-gel and hydrothermal methods were adopted to synthesize β-NiMoO4 and α-NiMoO4 respectively, which were characterized by XRD and H2-TPR. Their catalytic performances for oxidative dehydrogenation of propane were tested. The results indicated that the crystal structure of catalysts obtained from different preparation methods was different; thereby there was a great variation in the catalytic performance. The β-NiMoO4 catalyst prepared by the sol-gel method exhibited the better catalytic performance for oxidative dehydrogenation of propane under the low temperature, over which the propylene yield can attain 9.47% at 450°C, than that of α-NiMoO4 prepared by the hydrothermal method.