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Preferential oxidation of CO on copper-containing manganese oxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
42386 45923 2009 6 PDF Available
Title
Preferential oxidation of CO on copper-containing manganese oxides
Abstract

Copper-containing manganese oxides (Cu/Mn (molar ratio) = 0–1/1) prepared by the sol–gel method were characterized by temperature-programmed desorption of CO (CO-TPD) and of H2 (H2-TPD), temperature-programmed reduction with H2 (H2-TPD), and competitive adsorption of CO and H2. Copper-containing manganese oxides (amorphous structure, mesopores of about 6 nm, and high surface areas of 170–230 m2 g−1) were used for preferential oxidation (PROX) of CO in a large excess of H2. It was observed that copper-containing manganese oxides could preferentially and totally oxidize 1 vol% CO at temperature lower than 100 °C. The reason for high O2 selectivity to CO oxidation was discussed. Preferential adsorption of CO to H2 on the highly active sites and low activity of the manganese oxide-based catalysts to oxidize H2 were the reasons for the favorable performance.

Graphical abstractCopper-containing manganese oxides were studied for the preferential CO oxidation in H2-rich stream (1 vol% CO, 1 vol% O2, 60 vol% H2 and balance N2). Preferential and complete conversion of CO was attained at 75 °C with substantially 100% O2 selectivity. Preferential adsorption of CO on the highly reactive site and low H2-oxidation activity of the catalysts contributed to the excellent performance.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Manganese oxide; Copper; Preferential oxidation of CO; PROX; Competitive adsorption
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 371, Issues 1–2, 15 December 2009, Pages 67–72
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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