Preparation, Characterization, And Properties Of Monolithic Fe/Al2O3/cordierite Catalysts For NO Reduction With C2H6

Abstract

Monolithic cordierite-based Fe/Al2O3 catalysts were prepared using a sol-gel and impregnation method and characterized by N2 adsorption, XRD, SEM, XPS, H2-TPR, and an activity test for the reduction of NO with C2H6. The results indicated that the textural properties, surface morphology, nanorod size, crystallinity, reducibility, and NO reduction activity of the catalysts were correlated with the iron loading. The order of the C2H6-SCR activity was as follows: 5.5Fe/Al2O3/CM > 3.5Fe/Al2O3/CM > 8Fe/Al2O3/CM > 2Fe/Al2O3/CM. High activity (97% NO conversion) was observed with 5.5 wt.% iron at 600°C in the presence of oxygen. The results indicate that the iron oxide nanorods distributed on the surface of the Al2O3 layer may act as the SCR active site. Based on in situ DRIFTS spectral analysis, O2 can act as a promoter for the formation of the NO2/NO3- species. However, the formation of -NCO species does not appear to be accelerated by O2.

Department(s)

Civil, Architectural and Environmental Engineering

Comments

National Natural Science Foundation of China, Grant 51278095

Keywords and Phrases

C H 2 6; Cordierite; In situ DRIFTS; Iron alumina; SCR of NO

International Standard Serial Number (ISSN)

0926-860X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Elsevier, All rights reserved.

Publication Date

25 Sep 2015

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