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Mesoporous Cu–Mn Hopcalite catalyst and its performance in low temperature ethylene combustion in a carbon dioxide stream

Paper ID Volume ID Publish Year Pages File Format Full-Text
42590 45932 2009 7 PDF Available
Title
Mesoporous Cu–Mn Hopcalite catalyst and its performance in low temperature ethylene combustion in a carbon dioxide stream
Abstract

Complete combustion of trace amounts of ethylene in food grade CO2 over a Cu–Mn Hopcalite catalyst has been investigated. A mesoporous structure is identified in the catalyst. Low temperature calcined samples are found to be more active than the high temperature calcined ones. The presence of Cu2+ and Mn3+ is essential for the high activity of the catalyst. The Cu–Mn catalyst without a third component deactivates quickly in the reaction stream. However, doping with Al or Mg individually and with Ni–Al or Mg–Al simultaneously increases the lifetime. In situ DRIFTS measurements provide evidence that hydroxyl groups form and adsorb on Mn species. With the doping of Al, Mg and Ni ions, the amount of hydroxyl groups adsorbed reduces and the stability improves. Doping with Al and Mg simultaneously gives the best stability. A synergetic effect between CuO and amorphous Cu–Mn oxide phases is also confirmed.

Graphical abstractThis work examines the doping effects of Al and Mg individually and of Ni–Al and Mg–Al simultaneously on the properties of a Hopcalite catalyst. The reaction and the deactivation mechanisms of ethylene combustion in a carbon dioxide stream are discussed.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hopcalite catalyst; Ethylene combustion; Oxidation; Doping effect; Carbon dioxide purification
First Page Preview
Mesoporous Cu–Mn Hopcalite catalyst and its performance in low temperature ethylene combustion in a carbon dioxide stream
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 370, Issues 1–2, 30 November 2009, Pages 59–65
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis