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http://dx.doi.org/10.9713/kcer.2014.52.5.688

The Effect of SO2 and H2O on the NO Reduction of V2O5-WO3/TiO2/SiC Catalytic Filter  

Ha, Ji-Won (Department of Chemical Engineering/ERI, Gyeongsang National University)
Choi, Joo-Hong (Department of Chemical Engineering/ERI, Gyeongsang National University)
Publication Information
Korean Chemical Engineering Research / v.52, no.5, 2014 , pp. 688-693 More about this Journal
Abstract
For investigating NO reduction activity of an catalytic filter, the catalytic performance was measured under the presence of $SO_2$ and $H_2O$, respectively or simultaneously in the simulation gas composed of NO, $NH_3$, and air. The catalytic filter was prepared by coating $V_2O_5-WO_3/TiO_2$ catalyst on the pore surface of SiC filter element of which the superior performance for the particulate removal was well known. At the temperature below $260^{\circ}C$, the catalytic activities were enormously decreased under the presence of $SO_2$ and $H_2O$, respectively or simultaneously, compared with those under the cases of the absence of $SO_2$ and $H_2O$. However, the presence of $SO_2$ promoted the performance of the catalytic filter above $320^{\circ}C$ with showing the NO conversion better than 99.8% for the NO inlet concentration of 500 ppm and at the face velocity of 2 cm/s. In particular, the presence of water showed high NO conversion higher than 99% up to high temperature of $380^{\circ}C$. This effect of water was explained by the reason that it retarded the ammonia oxidation which is the main step into the formation of $N_2O$. The initial NO reduction activity of the catalytic filter maintained for the duration of 100 hours in the presence of $SO_2$ and $H_2O$. Therefore, it was concluded that the catalytic filter was promisingly useful for the industrial NOx reduction catalyst in order to treat the particulate and NO simultaneously.
Keywords
Catalytic Filter; NO Reduction; $SO_2$ Effect; $H_2O$ Effect;
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Times Cited By KSCI : 3  (Citation Analysis)
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