Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 33, Issue 7, Pages 1093-1098Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201000015
Keywords
De-NOx; Iron-based catalysts; Mossbauer spectroscopy; Low-temperature
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Funding
- National Natural Science Foundation of China [50576013]
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Low-temperature De-NOx technology is a new topic in the area of flue gas treatment. This paper presents experimental studies on selective catalytic reduction (SCR) of NOx 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 Fe3O4 and gamma-Fe2O3, and they are analyzed by X-ray diffraction (XRD) and Mossbauer spectroscopy, before and after reaction. It is observed that the efficiency of De-NOx with gamma-Fe2O3 catalyst is high at temperatures from 200-290 degrees C and the maximum efficiency is seen to exceed 90 % at 250 degrees C. The effects of magnetic fields on SCR De-NOx using gamma-Fe2O3 particles as catalysts are also studied by applying uniform and coaxial magnetic fields to the fluidized bed. The results suggest that SCR De-NOx on gamma-Fe2O3 catalyst is fit for operation below 200 degrees C in the fluidized reactor in conjunction with the effects of magnetic fields.
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