Study On Ni-Mo-P Based Catalysts And Their Performance For Methane Reforming With Carbon Dioxide

Transition metal phosphide is widely used in hydrogenation desulfuration, denitrification, due to its excellent hydrogenation desulfurization, denitrification activity and selectivity of become a hotspot in the field of new catalytic materials research, is considered a good application prospect of a new generation of catalyst. Physical applies WP, MoP catalyst reforming reaction of CH4, CO2, has high reaction activity and carbon deposition resistance, and accessible raw materials, simple preparation process of environmental protection.First, this paper mainly studies with (NH4)6Mo7O24·4H2O for molybdenum sources, NH4H2PO4for phosphorus source, Ni(NO3)2as the source of nickel, preparation of Ni-Mo-P ternary catalyst, and applied to the carbon dioxide reforming of methane, examines the preparation conditions of Ni-Mo-P ternary catalyst reforming activity. Based on its catalytic activity and carbon deposition resistance, the use of H2TPR and XRD testing technology such as the performance of the catalysts were characterized. Compared with the MoP catalyst, adding a certain amount of Ni, can significantly improve the performance of the catalyst when Ni/Mo/P=1:1:1, water thermal method,12h at363K under the condition of Chen, after drying, roasting for5h at773K conditions, with final temperature of923K under the condition of the temperature programmed reduction, after passivation, of Ni-Mo-P catalysts have good stability and activity.Second, on the premise of the same load, the Baptist legal points for the preparation of Ni-Mo-P ternary catalyst for CO2reforming CH4as the probe reaction, the use of H2TPR and XRD characterization, different carrier of CH4and CO2reforming reflect the effects of catalytic performance. The results show that rare earth oxides do carrier when the activity is much higher than conventional oxide carrier catalyst for preparation of Ni-Mo-P. Active order of Y2O3>Eu2O3> MgO>SiO2>ZrO2>TiO2>γ-Al2O3.Finally, using different preparation methods of the preparation of supported Ni-Mo-P/Y2O3ternary catalyst for CO2reforming CH4as the probe reaction, using H2-TPR and XRD characterization, inspects its activity and stability, explore the best Ni-Mo-P active component load, the results show that:according to the mole ratio of Ni/Mo/P=1:1:1,(NH4)6Mo7O24·H2O as source of molybdenum, NH4H2PO4for phosphorus source, Ni(NO3)2as the source of nickel, using immersion method (dipping MoP first, and then immersion Ni), preparation of Ni-Mo-P load was30%, the load type Ni-Mo-P/Y2O3catalyst has good catalytic activity and carbon deposition resistance.