Effect of reduction methods and temperature on structure and performance of Nickel-based catalysts for partial oxidation of methane

摘要

Influence of reduction methods and reduction temperature on the structure and performance of nickel-based catalysts for methane partial oxidation was investigated by means of H2-TPR, XRD, TEM and activity evaluation. Compared with the temperature-programmed reduction method, the isothermal reduction method led to better property. With increasing isothermal reduction temperature, the structure of POM-1 catalyst changed ，and the hotspot temperature of catalyst bed exceed 1000 °C. But the structure of POM-5 catalyst was never changed, and the hotspot temperature of POM-5 catalyst bed just be 950 °C，near its calcinations temperature. This phenomenon was perhaps due to complete oxidation of methane promoted by larger nickel crystallites.