Premium
A study of the mechanism of iron‐based sulfate catalyst for selective catalytic reduction of NO with NH 3
Author(s) -
Zhao Yufeng,
Zhao Bo,
Zhuo Yuqun,
Chen Changhe,
Xu Xuchang
Publication year - 2011
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.610
Subject(s) - catalysis , x ray photoelectron spectroscopy , sulfate , chemistry , stoichiometry , selective catalytic reduction , fourier transform infrared spectroscopy , diffuse reflectance infrared fourier transform , inorganic chemistry , iron sulfate , reaction mechanism , diffuse reflection , nuclear chemistry , photocatalysis , chemical engineering , organic chemistry , physics , optics , engineering
The catalytic activity of iron‐based sulfate catalyst in selective catalytic reduction (SCR) of NO with NH 3 in the presence/absence of O 2 was investigated. Powder X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) are applied to study the iron‐based sulfate catalyst. The iron‐based sulfate catalyst shows considerable catalytic activity for the SCR reaction at 350–450 °C in the presence of O 2 . NO and NH 3 reacted with the stoichiometry ratio of 1:1 over iron‐based sulfate catalysts in the absence of O 2 at 350 °C. By the comparison of NO conversion in the absence/presence of O 2 , an SCR reaction mechanism that included NH 3 oxidation by Fe 3+ and the re‐oxidation of Fe 2+ is inferred on the basis of the results obtained from XRD, XPS, and DRIFT. Copyright © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.