Effects of alkali and rare earth metal oxides on the thermal stability and the carbon- deposition over a NiO/Al_2O_3 catalyst

摘要

The NiO/Al_2O_3 catalyst was modified by alkali metal oxide (Li, Na, K) and rare-earth metal oxide (La, Ce, Y, Sm) in order to improve the Thermal stability and the ability of carbon-deposition resistance during the Partial oxidation of methane (POM) to syngas reaction at high temperature. The reaction performance, thermal stability, dispersity of nickel and carbon- Deposition of the modified NiO/Al_2O_3 catalyst and unmodified NiI/Al_2O_3 Catalyst were investigated by a series of characterization techniques Including flowreactor, CO chemisorption, TG, TPO, XPS and XRD.