Oxidative coupling of methane and oxidative dehydrogenation of ethane over strontium-promoted rare earth oxide catalysts

✍ Scribed by Vasant R. Choudhary; Shafeek A. R. Mulla; Vilas H. Rane

• Publisher: Wiley (John Wiley & Sons)
• Year: 1998
• Tongue: English
• Weight: 275 KB
• Volume: 71
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199802)71:2<167::aid-jctb789>3.0.co;2-f

✦ Synopsis

Sr-promoted rare earth (viz. La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Er and Yb)

oxide catalysts (Sr/rare earth ratio \ 0É1) are compared for their performance in the oxidative coupling of methane (OCM) to hydrocarbons and C 2 oxidative dehydrogenation of ethane (ODE) to ethylene at di †erent temperatures (700 and 800¡C) and (or ratios (4È8), at low contact time (space CH 4 C 2 H 6 )/O 2 velocity \ 102 000 cm3 g~1 h~1). For the OCM process, the catalyst SrÈLa 2 O 3 shows the best performance. The Sr-promoted and Nd 2 O 3 , Sm 2 O 3 , Eu 2 O 3 catalysts also show good methane conversion and selectivity for Er 2 O 3 C 2 hydrocarbons but the and catalysts show very poor per-SrÈCeO 2 SrÈDy 2 O 3 formance. However, for the ODE process, the best performance is shown by the catalyst. The other catalysts also show good ethane conversion and SrÈNd 2 O 3 selectivity for ethylene ; their performance is comparable at higher temperatures (º800¡C), but at lower temperature (700¡C) the and cata-SrÈCeO 2 SrÈPr 6 O 11 lysts show poor selectivity. 1998 SCI.