Autothermal Oxidative Dehydrogenation of Ethane on LaMnO3- and Pt-Based Monoliths: H2 and CO Addition

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• 作者：Francesco Donsì ; Stefano Cimino ; Raffaele Pirone ; and Gennaro Russo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2005
• 出版时间：January 19, 2005
• 年：2005
• 卷：44
• 期：2
• 页码：285 - 295
• 全文大小：792K
• 年卷期：v.44,no.2(January 19, 2005)
• ISSN：1520-5045

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.