Influence of H2 O and SO2 on NO reduction by methane on the surface of iron
ZHOU Hao
LIAO Wenyu
SU Yaxin
LIN Yuexin
Abstract：In order to investigate the effects of H2 O and SO2 on NO reduction by methane on the surface of iron,the NO reduction efficien-cy was tested at 300 ℃ to 1100 ℃ in an programmed electric heating horizontal ceramic tube reactor in N2 and simulated flue gas atmos-phere respectively. The component of iron samples after reaction were analyzed by XRD,ESEM and EDX. The results demonstrated that in N2 atmosphere,H2 O and SO2 reacted with iron in the competition reaction with NO on the surface of iron which inhabited NO reduction. In the simulated flue gas atmosphere,H2 O and SO2 promoted NO reduction by methane on the surface of iron. The formation of porous oxide layer of Fe2 O3 caused by the oxidation of water vapor on iron,enhanced the interaction of NO with metallic iron and then improved NO re-ductionefficiency.Whentheexcessairratiowas0.7inreactionzone(SR1)and1.2inburnoutzone(SR2),theNOreductionefficiency at 1000 ℃ was 96. 9% in the presence of 7% H2 O and 0. 02% SO2 ,compared with the value of 90. 6% in the absence of H2 O and SO2 .
Keywords：NO reductionmethaneironiron oxidesH2 OSO2
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 51-55 )