Partial oxidation of propane to syngas over nickel supported catalysts modified by alkali metal oxides and rare-earth metal oxides

摘要

The reaction perfonnance, catalyst acidity and basicity property, and carbon-deposition of various nickel-supported catalysts for partial oxidation of propane (POP) to syngas were investigated with a flow-reactor, FfIR, TG and UVRRS analyses. The NiO/"y-Ab03 catalyst is the most suitable for the POP reaction among NiO/"y-Ab03. NiO/MgO and NiO/Si02. And the reaction perfonnance of the NiO/"y-Ab03 shows little difference from those of the nickel-supported catalysts modified by alkali metal oxides and rare-earth metal oxides. However, modification with alkali metal oxide Li20 and rare-earth metal oxide La2 03 can reduce the Lewis acidity intensity of the NiO/"y- Ab 03 and enhance its ability to suppress carbon-deposition during the POP reaction. The carbon-deposition contains graphite-like species that were detected by UVRRS. The nickel-supported catalysts modified by alkali metal oxides and rare-earth metal oxides possess good reaction perfonnance and carbon-deposition resistance.