TOTAL OXIDATION PATHWAYS IN OXIDATIVE COUPLING OF METHANE OVER LANTHANUM OXIDE CATALYSTS

被引：24

作者：

LACOMBE, S

SANCHEZ, JG

DELICHERE, P

MOZZANEGA, H

TATIBOUET, JM

MIRODATOS, C

机构：

[1] INST RECH CATALYSE,CNRS,F-69626 VILLEURBANNE,FRANCE

[2] UNIV PARIS 06,REACTIV SURFACE & STRUCT LAB,CNRS,URA 1106,F-75252 PARIS 05,FRANCE

来源：

CATALYSIS TODAY | 1992年 / 13卷 / 2-3期

关键词：

D O I：

10.1016/0920-5861(92)80151-C

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Lanthanum oxides calcined at low or high temperature are shown to present a surface composition corresponding to the phase La2O2(CO3) in the conditions of the oxidative coupling of methane. The C2 selectivity and productivity are improved on samples calcined at low temperature. At variance with the C2 formation, the total oxidation into CO2 would proceed mainly from surface reactions. The concentration and reactivity of the oxidation sites, determined from isotopic transient experiments, appear to depend on the procedure of catalyst preparation.

引用

页码：273 / 282

页数：10

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