Cellulose Conversion with Tungstated-Alumina-Based Catalysts: Influence of the Presence of Platinum and Mechanistic Studies

被引：28

作者：

Chambon, Flora ^{[1
]}

Rataboul, Franck ^{[1
]}

Pinel, Catherine ^{[1
]}

Cabiac, Amandine ^{[2
]}

Guillon, Emmanuelle ^{[2
]}

Essayem, Nadine ^{[1
]}

机构：

[1] Univ Lyon 1, Inst Rech Catalyse Environm Lyon IRCELYON, CNRS, UMR5256, F-69626 Villeurbanne, France

[2] IFP Energies Nouvelles, Rond Point Echangeur Solaize, BP 3, F-69360 Solaize, France

来源：

CHEMSUSCHEM | 2013年 / 6卷 / 03期

关键词：

heterogeneous catalysis; hydrothermal synthesis; lewis acids; platinum; tungsten; ETHYLENE-GLYCOL; SUBCRITICAL WATER; SUGAR ALCOHOLS; AQUEOUS-PHASE; LACTIC-ACID; SOLID ACIDS; HYDROLYSIS; GLUCOSE; HYDROGENOLYSIS; HYDROGENATION;

D O I：

10.1002/cssc.201200880

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The performances of platinum supported on tungstated alumina (Pt/AlW) in the hydrothermal conversion of cellulose at 190 degrees C under H2 pressure were evaluated and compared to that of Pt-free tungstated alumina (AlW). We show that the presence of Pt significantly increased the extent of conversion and led to a different product distribution with the formation of acetol and propylene glycol as the main products and a global yield of up to 40%. Based on previous reports, we propose the formation of pyruvaldehyde on the Lewis acid sites of the tungstated alumina as a key intermediate. Pyruvaldehyde can then be transformed to acetol and propylene glycol or lactic acid depending on the presence or absence of supported Pt.

引用

页码：500 / 507

页数：8

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