ACTIVATION OF METHANE USING SOLID OXIDE MEMBRANES

被引：68

作者：

TENELSHOF, JE

VANHASSEL, BA

BOUWMEESTER, HJM

机构：

[1] University of Twente, Department of Chemical Technology, Laboratory of Inorganic Materials Science, 7500 AE Enschede

来源：

CATALYSIS TODAY | 1995年 / 25卷 / 3-4期

关键词：

D O I：

10.1016/0920-5861(95)00082-Q

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Dense membranes of mixed-conducting perovskite-type oxides L(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3) and L(0.8)Ba(0.2)Co(0.8)Fe(0.2)O(3) were used for methane coupling by application of pressure-driven O-2 permeation. High operating temperatures, typically above 800 degrees C, were needed to obtain reasonable oxygen fluxes. Conversions were small (1-3%). Both compositions showed comparable C-2 selectivities at low methane partial pressures. At higher pressures the selectivity to C-2 hydrocarbons for Lr0.6Sr0.4Co0.8Fe0.2O3 increased to 67%, whereas La0.8Ba0.2Co0.8Fe0.2O3 showed small C-2 selectivities. Strong surface segregation of Sr and Ba was shown by SEM for bath compositions.

引用

页码：397 / 402

页数：6

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