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Multicomponent Au/MgO catalysts designed for selective oxidation of carbon monoxide: Application of a combinatorial approach

Paper ID Volume ID Publish Year Pages File Format Full-Text
43224 45958 2008 9 PDF Available
Title
Multicomponent Au/MgO catalysts designed for selective oxidation of carbon monoxide: Application of a combinatorial approach
Abstract

A complex combinatorial approach has been applied for the design of multicomponent Au/MgO catalysts for CO oxidation in the presence of hydrogen. The combinatorial library design led to unique earlier unknown catalyst compositions. The best catalysts contained significant amount of Pb and Sm, which had never been reported before as useful components of PROX catalysts. In order to increase the diversity of experimental space different pretreatment conditions have been applied prior to catalytic tests. Actually, two catalyst libraries have been tested after (i) a reductive, and (ii) a combined reductive pretreatment. Significantly different optimum compositions have been obtained upon using these two pretreatment procedures. The combined reductive treatment resulted in a more cost effective optimum composition with significantly less components and smaller gold content in comparison to the best catalyst obtained upon using a simple reductive treatment. Further studies showed different ways of promoting action of modifiers. After reductive pretreatment the modifiers suppress the hydrogen consumption, while after combined reductive pretreatment the modifiers lead to the promotion of both oxidation reactions.

Graphical abstractCombinatorial approach using both library optimization and information mining tools was applied in designing multicomponent Au/MgO catalysts for CO oxidation in the presence of hydrogen. High activity (αCO) and selectivity (SCO) required the modification of both gold and the support. Different optimum gold and modifier concentrations were found depending on the mode of catalyst pretreatment prior to the use of catalysts.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Au/MgO; Modification of gold; PROX; Combinatorial catalysis; Catalyst library design; High throughput experimentation; Artificial neural networks; Information mining; Multicomponent catalysts
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Multicomponent Au/MgO catalysts designed for selective oxidation of carbon monoxide: Application of a combinatorial approach
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 334, Issues 1–2, 1 January 2008, Pages 348–356
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us