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Acidity control of ruthenium pillared clay and its application as a catalyst in hydrogenation reactions

Paper ID Volume ID Publish Year Pages File Format Full-Text
42395 45923 2009 11 PDF Available
Title
Acidity control of ruthenium pillared clay and its application as a catalyst in hydrogenation reactions
Abstract

Aluminum pillared clay was used as a support for the preparation of catalysts containing ruthenium as active metal, in the presence or not of a promoter (tin) and an acid reducer (barium). The catalysts were characterized and tested for hydrogenation of dimethyl adipate reactions. The results showed a high conversion, typically above 95%, in all studied systems. This conversion occurs irrespectively of the presence of active metal; therefore, it may be due to the support's intrinsic activity. The acidity was identified as the main cause of this activity. A barium treatment of these catalysts significantly reduced this acidity, thus making more selective the available systems. The catalysts treated with barium reduced the formation of undesirable products up to 45%. Similarly, the presence of tin helped to obtain valuable products such as gamma-caprolactone and methyl caproate, which reached high selectivity values (18.6% and 16.9%, respectively).

Graphical abstractAluminum pillared clay was used as a support for the preparation of catalysts containing ruthenium as active metal. The catalysts were characterized and tested for hydrogenation of dimethyl adipate reactions. The results showed a high conversion, typically above 95%. A barium treatment significantly reduced the Bronsted acidity of these catalysts, thus making more selective systems available.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Pillared clay; Hydrogenation; Ruthenium; Acidity control; Adipate; Lactones
First Page Preview
Acidity control of ruthenium pillared clay and its application as a catalyst in hydrogenation reactions
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 371, Issues 1–2, 15 December 2009, Pages 131–141
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis