Carbon nanotunes supported Pt and Pt-Ru catalysts for selective hydrogenation of Citral: Effect of promoters and Thermal activation of catalysts

被引：4

作者：

Ananthan, Sakunthala Angamuthu ^{[1
]}

Vengidusamy, Narayanan ^{[1
]}

Giribabu, Krishnamoorthy ^{[1
]}

Suresh, Ranganathan ^{[1
]}

机构：

[1] Univ Madras, Sch Chem Sci, Dept Inorgan Chem, Madras 600025, Tamil Nadu, India

来源：

RECENT TRENDS IN ADVANCED MATERIALS | 2012年 / 584卷

关键词：

Pt-Ru bimetallic catalysts; Citral hydrogenation; MWCNT supported catalyst; Metal-support interaction; alpha beta-Unsaturated alcohol; Geraniol and Nerol; ALPHA; BETA-UNSATURATED ALDEHYDES; UNSATURATED ALDEHYDES; ADSORPTION; METALS; C=O;

D O I：

10.4028/www.scientific.net/AMR.584.229

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

MWCNT supported Pt, Ru, and Pt Ru catalysts were prepared and reduced at two different temperatures, 375 degrees C (LTR) and 675 degrees C (HTR) for the selective hydrogenation of citral to the corresponding unsaturated alcohols (geraniol and nerol). The catalysts were characterized by BET Surface area measurement, TPD, SEM, EDAX, TEM, XRD and XPS. It was found that the XRD of Pt and Ru shows fcc and hcp crystalline structure respectively, which is uniformly dispersed with an average particles size of 3.5 nm and zero valence metallic state. The removal of acidic oxygen surface group is observed when heat- treatments in a inert atmosphere at 675 degrees C were performed. The bimetallic catalyst of Pt-Ru/MWCNT (HTR) was found to afford remarkably high conversion levels (85%) and high selectivity (95%) provided that a thermal pretreatment was performed on the catalyst. These results can be rationalized in terms of electron transfer from the support to the metal. The catalysts are environment friendly and can be recycled for more than eight times.

引用

页码：229 / 233

页数：5

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