ISSN:
0268-2575
Keywords:
oxidative coupling of methane
;
oxidative dehydrogenation of ethane
;
strontium-promoted rare earth oxide catalysts
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Sr-promoted rare earth (viz. La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Er and Yb) oxide catalysts (Sr/rare earth ratio = 0·1) are compared for their performance in the oxidative coupling of methane (OCM) to C2 hydrocarbons and oxidative dehydrogenation of ethane (ODE) to ethylene at different temperatures (700 and 800°C) and CH4 (or C2H6)/O2 ratios (4-8), at low contact time (space velocity = 102000 cm3 g-1 h-1). For the OCM process, the Sr-La2O3 catalyst shows the best performance. The Sr-promoted Nd2O3, Sm2O3, Eu2O3 and Er2O3 catalysts also show good methane conversion and selectivity for C2 hydrocarbons but the Sr-CeO2 and Sr-Dy2O3 catalysts show very poor performance. However, for the ODE process, the best performance is shown by the Sr-Nd2O3 catalyst. The other catalysts also show good ethane conversion and selectivity for ethylene; their performance is comparable at higher temperatures (≥800°C), but at lower temperature (700°C) the Sr-CeO2 and Sr-Pr6O11 catalysts show poor selectivity. © 1998 SCI.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
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