Low‐Temperature De‐NO x by Selective Catalytic Reduction Based on Iron‐Based Catalysts
Abstract Low‐temperature De‐NO x technology is a new topic in the area of flue gas treatment. This paper presents experimental studies on selective catalytic reduction (SCR) of NO x from synthetic flue gas over iron‐based catalysts with ammonia in a fluidized reactor. The iron‐based catalysts used i...
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| Published in | Chemical engineering & technology Vol. 33; no. 7; pp. 1093 - 1098 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
01.07.2010
|
| Online Access | Get full text |
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| Summary: | Abstract
Low‐temperature De‐NO
x
technology is a new topic in the area of flue gas treatment. This paper presents experimental studies on selective catalytic reduction (SCR) of NO
x
from synthetic flue gas over iron‐based catalysts with ammonia in a fluidized reactor. The iron‐based catalysts used in the experiments are particles of Fe
3
O
4
and γ‐Fe
2
O
3
, and they are analyzed by X‐ray diffraction (XRD) and Mössbauer spectroscopy, before and after reaction. It is observed that the efficiency of De‐NO
x
with γ‐Fe
2
O
3
catalyst is high at temperatures from 200–290 °C and the maximum efficiency is seen to exceed 90 % at 250 °C. The effects of magnetic fields on SCR De‐NO
x
using γ‐Fe
2
O
3
particles as catalysts are also studied by applying uniform and coaxial magnetic fields to the fluidized bed. The results suggest that SCR De‐NO
x
on γ‐Fe
2
O
3
catalyst is fit for operation below 200 °C in the fluidized reactor in conjunction with the effects of magnetic fields. |
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| ISSN: | 0930-7516 1521-4125 |
| DOI: | 10.1002/ceat.201000015 |