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Removal of NO from Flue Gas by a Heterogeneous Fenton‐Like Process
Author(s) -
Zhao Yi,
Han Yuhong,
Zhao Zheng
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700717
Subject(s) - chemistry , catalysis , flue gas , ferric , phosphotungstic acid , hydrogen peroxide , chemisorption , inorganic chemistry , quenching (fluorescence) , chloride , organic chemistry , physics , quantum mechanics , fluorescence
An iron‐containing polyoxometalates (POMs) complex (Fe III AspPW) was synthesized from ferric chloride, aspartic acid, and phosphotungstic acid for developing a novel method based on a Fenton‐like process using Fe‐containing POMs as heterogeneous catalyst to remove NO from flue gas. The effects of various experimental parameters on NO removal efficiency were evaluated in a self‐made bubbling reactor. Under optimized conditions, an average removal efficiency of > 90 % was obtained. The dominant reactive species generated in the system was suggested to be • OH by adding the • OH quenching agent of tert ‐butanol and the main reaction product was identified as nitrate. A possible catalytic mechanism was proposed on the basis of experimental results and references. The catalysis might result from the redox cycles of ≡Fe III ↔≡Fe II and ≡POM↔≡POM − on the surface of Fe III AspPW, and the high catalytic activity of Fe III AspPW might be attributed to the chemisorption of H 2 O 2 on its surface by hydrogen bonding.