- 作者: 王志龍 ; 鄭淑芬
- 作者服務機構: 台灣大學化學系
- 中文摘要: The catalytic properties of Na-buserite and Keggin ion-pillared buserite (abbreviated as KPB) in the oxidation of ethane, were investigated with varied mixtures of ethane and air. Na-buserite Na/sub 4/Mn/sub 14/O/sub 26/.bcdot.xH/sub 2/O is a layered manganese oxide, KPB was prepared by the introduction of aluminum Keggin ions, [ Al/sub 13/O/sub 4/(OH)/sub 24/(H/sub 2/O)/sub 12/ ]/sup 7+/ into the interlayers. Pillaring of the interlayers increases the active surface area participating in the reactions, as indicated by greater conversion over KPB than over a Na-buserite catalyst. In an oxygen-rich environment, complete combustion of ethane is achieved at temperatures.apprxeq.350.degree.C over KPB, and the structure of KPB is retained. The structure of KPB is less stable than that of Na-buserite in an oxygen-poor environment, and it disintegrates at large conversion. This phenomenon is explained in terms of the oxygen deficiency in the interlayer at a large reaction rate. Similar effects were absent from an oxygen-rich environment. The variation of the product selectivity of Na-buserite and KPB catalysts is discussed in terms of the presence of interlayer reaction sites.
- 英文摘要: --
- 中文關鍵字: Na-Buserite; Keggin Ion-Pillared Buserite; Layered Manganese Oxide; Ethane Oxidation; Catalyst
- 英文關鍵字: 分層氧化錳;乙烷氧化反應;觸媒