Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 41, Issue 11, Pages 2203-2211Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201700717
Keywords
Fe(III)AspPW complex; Flue gas; Heterogeneous catalyst; NO removal
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Funding
- National Key R&D Program of China [2016 YFC0203701, 2016YFC0203705, 2017YFC0210603]
- National Science-Technology Support Plan of China [2014BAC23B04-06]
- Beijing Major Scientific, Technological Achievement Transformation Project of China [Z151100002815012]
- Special Scientific Research Fund of Public Welfare Profession of China [201309018]
- National Natural Science Foundation of China [51607054]
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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)-O-center dot by adding the (OH)-O-center dot 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 (FeFeII)-Fe-III and POMPOM- on the surface of Fe(III)AspPW, and the high catalytic activity of Fe(III)AspPW might be attributed to the chemisorption of H2O2 on its surface by hydrogen bonding.
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