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Simultaneous catalytic reduction of N 2 O and NO x produced in a fluidized bed incineration of sewage sludge
Author(s) -
Lee SeungJae,
Ryu InSoo,
Jeon SangGoo,
Moon SeungHyun
Publication year - 2015
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1504
Subject(s) - incineration , sewage sludge , fluidized bed , catalysis , sewage , chemistry , waste management , nitrogen , pulp and paper industry , environmental science , environmental engineering , organic chemistry , engineering
Fluidized bed incineration of sewage sludge could produce large amounts of N 2 O due to the relatively high nitrogen content of the sewage sludge and low incineration temperatures. In this study, N 2 O and NO x emissions released during the fluidized bed incineration of dried sewage sludge powder were investigated. Sewage sludge feeding rate was about 8∼10 kg/h, and bed aspect ratio was fixed to ca. 1.2. Superficial velocity was adjusted to ca. 1.9 m/s. The concentrations of N 2 O and NO x in the exhaust gas were greatly influenced by bed temperature in a range between 850 °C and 950 °C. In the simultaneous catalytic reduction of N 2 O and NO x on an Fe/BEA pellet catalyst with NH 3 , most of the N 2 O and NO x were removed when heated above the inlet reaction temperature 410 °C. Thus, simultaneous catalytic reduction was shown to be a promising N 2 O abatement technology for the fluidized bed incineration of sewage sludge. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd