Alkane Activation over Acidic Zeolites: The First Step

被引：39

作者：

Louis, Benoit ^{[2
]}

Pereira, M. Maciel ^{[3
]}

Santos, Fabiana M. ^{[3
]}

Esteves, Pierre M. ^{[3
]}

Sommer, Jean ^{[1
]}

机构：

[1] Inst Chim, UMR 7177, F-67070 Strasbourg, France

[2] CNRS, Lab Mat Surfaces & Procedes Catalyse, UMR 7515, F-67087 Strasbourg 2, France

[3] Univ Fed Rio de Janeiro, Inst Quim, BR-21941909 Rio De Janeiro, Brazil

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2010年 / 16卷 / 02期

关键词：

alkanes; heterogeneous catalysis; hydrocarbons; zeolites; SOLID ACIDS; QUANTITATIVE-DETERMINATION; EXCHANGE; CATALYSTS; SITES; ISOBUTANE; OXIDATION; MECHANISM;

D O I：

10.1002/chem.200901737

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The heterogeneous acid-catalyzed activation step of alkalies leading to the reaction intermediates (carbo-cationic or alkoxy species) was up to now the matter of a longstanding controversy. Gas chromatography and online mass spectroscopy measurements show that H-2 and methane are formed over H-zeolites, whereas HD and CH3D are formed over D-zeolites as the primary products in the reaction with isobutane. These results indicate that o-bond protolysis by strong acid sites is the first step for hydrocarbon activation on these catalysts at mild temperatures (473 K), in analogy to the activation Path Occurring ill liquid superacid media.

引用

页码：573 / 576

页数：4

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