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Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)2O3 + δ Catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
50417 46794 2014 4 PDF Available
Title
Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)2O3 + δ Catalysts
Abstract

•Ho2O3-based catalysts exhibit high NO decomposition activity.•The catalysts show high tolerance to O2 and CO2 coexistence.•The praseodymium ions in the lattice facilitate O2 desorption to increase the NO decomposition activity.

C-type cubic holmium oxide (Ho2O3), which has a large number of basic sites, was employed as a host material for NO decomposition catalysts, and zirconium and praseodymium ions were introduced into the lattice to increase the surface area and to control O2 desorption ability of Ho2O3, respectively. The highest catalytic activity was obtained for (Ho0.87Zr0.05Pr0.08)2O3.05 + δ, on which the NO conversion to N2 was as high as 71% at 900 °C in the absence of coexisting gases (NO/He atmosphere). The catalytic activity was maintained at a high conversion ratio even in the presence of the coexisting gases; the N2 yields of 50% and 47% were obtained even in the presence of 5 vol% O2 and CO2, respectively.

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Keywords
Direct NO decomposition; C-type cubic structure; Rare earth oxide; Coexisting gas resistance
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Direct decomposition of nitrogen monoxide on (Ho, Zr, Pr)2O3 + δ Catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 43, 5 January 2014, Pages 84–87
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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