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Selective catalytic reduction of NO on single site FeSiBEA zeolite catalyst: Influence of the C1 and C2 reducing agents on the catalytic properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
46131 46430 2012 7 PDF Available
Title
Selective catalytic reduction of NO on single site FeSiBEA zeolite catalyst: Influence of the C1 and C2 reducing agents on the catalytic properties
Abstract

FeSiBEA zeolite with 0.8 Fe wt% is prepared in acidic condition (pH 2.5) by a two-step postsynthesis method which allows to incorporate iron into framework of zeolite as mononuclear distorted tetrahedral Fe(III) species, as evidenced by XRD, diffuse reflectance UV–vis and X-ray absorption spectroscopy. The single site FeSiBEA catalyst with isolated and framework Fe centres is active in SCR of NO process with C2 (ethanol and ethylene) reducing agents, with selectivity towards N2 exceeding 90% in the broad temperature range from 573 to 723 K for maximum NO conversion about 50 and 30% at 573 K for ethanol and ethylene respectively. In contrast, this catalyst is much less active with C1 (methanol and methane) reducing agents, with maximum selectivity towards N2 not exceeding 65% with methanol and 10% with methane for maximum NO conversion of 10 and 23% respectively. The low activity in CH4-SCR of NO on Fe0.8SiBEA catalyst containing only isolated mononuclear distorted tetrahedral Fe(III) species in the framework zeolite could be explained by high energy of CH bond, which should be broken to activate methane molecule.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ Iron is incorporated in framework of zeolite as mononuclear tetrahedral Fe(III). ▸ The single site FeSiBEA catalyst is active in SCR of NO with ethanol and ethylene. ▸ The selectivity towards N2 exceeding 90% in the broad temperature range. ▸ FeSiBEA shows inferior activity with methanol and methane. ▸ The selectivity towards N2 is inferior 65% with methanol and 10% with methane.

Keywords
Iron; SiBEA; SCR of NO; Methanol; Methane; Ethanol; Ethylene
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Selective catalytic reduction of NO on single site FeSiBEA zeolite catalyst: Influence of the C1 and C2 reducing agents on the catalytic properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 123–124, 23 July 2012, Pages 134–140
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
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Full-text PDF Download
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Any Questions? feel free to contact us