Citral hydrogenation over Rh and Pt catalysts supported on TiO2: Influence of the preparation and activation protocols of the catalysts

被引：50

作者：

Ekou, Tchirioua ^{[1
,2
]}

Ekou, Lynda ^{[2
]}

Vicente, Aurelie ^{[1
,3
]}

Lafaye, Gwendoline ^{[1
]}

Pronier, Stephane ^{[1
]}

Especel, Catherine ^{[1
]}

Marecot, Patrice ^{[1
]}

机构：

[1] Univ Poitiers, UMR 6503, Lab Catalyse Chim Organ, F-86000 Poitiers, France

[2] Univ Abobo Adjame, Lab Thermodynam & Physicochim Milieu, Abidjan 02, Cote Ivoire

[3] Univ Caen, Lab Catalyse Spectrochim Caen, EnsiCaen, F-14050 Caen, France

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2011年 / 337卷 / 1-2期

关键词：

Citral hydrogenation; Rh; Pt; Titania; Unsaturated alcohols; Isopulegol; LIQUID-PHASE HYDROGENATION; PT-GE CATALYSTS; SELECTIVE HYDROGENATION; ALPHA; BETA-UNSATURATED ALDEHYDES; RUTHENIUM CATALYSTS; METAL-CATALYSTS; CROTONALDEHYDE; CITRONELLAL; SURFACE; TEMPERATURE;

D O I：

10.1016/j.molcata.2011.01.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

During citral hydrogenation, the products distribution obtained on Rh/TiO2 and Pt/TiO2 catalysts depends on their preparation and activation protocols: (i) the unsaturated alcohols (the intended products) are formed in higher quantity on samples reduced at 500 degrees C and more notably with Pt/TiO2 catalyst; (ii) samples prepared by impregnation of the metallic precursor salt in HCl medium and activated at 300 degrees C are the only ones to lead to the formation of isopulegol as by-product. On the catalysts activated at 500 degrees C, these results can be explained by the presence of the SMSI effect beneficial to hydrogenate selectively the C=O bond of citral towards unsaturated alcohols. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：82 / 88

页数：7

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