文摘
The autothermal oxidative dehydrogenation of ethane in short contact time reactors can becarried out with high ethylene yields on LaMnO3-based non-noble-metal catalysts. Theperformance of LaMnO3 honeycomb monoliths is evaluated in direct comparison with state-of-the-art Pt catalyst in an autothermal reactor configuration at varying external heating, N2dilution, C2H6/O2 ratio, and total flow rate. LaMnO3 and Pt are also compared after the additionof a secondary fuel. Evidence is present that H2 and especially CO addition are the means ofincreasing ethylene selectivity above 80% on LaMnO3, as preferentially this is oxidized in placeof ethane. The lower activity of Pt toward CO oxidation makes CO addition ineffective on sucha catalyst.