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http://dx.doi.org/10.5572/KOSAE.2017.33.6.605

The Reaction Characteristics of NOx/N2O and NH3 in Crematory Facility SCR Process with Load Variation  

Park, Poong Mo (Department of Environmental Engineering, University of Seoul)
Lee, Ha Young (Occupational Safety & Health Research Institute)
Yeo, Sang-Gu (Department of Environmental Engineering, University of Seoul)
Yoon, Jae-Rang (Department of Environmental Engineering, University of Seoul)
Dong, Jong In (Department of Environmental Engineering, University of Seoul)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.33, no.6, 2017 , pp. 605-615 More about this Journal
Abstract
Efficient simultaneous reduction conditions for $NO_x$ and $NH_3$-slip was investigated in SCR (Selective Catalytic Reduction) process with load variation by applying dual catalysts (SCR catalyst, $NH_3$ decomposition catalyst) system. $N_2O$ formation characteristics were analyzed to look into possible undesirable reaction pathways. In the experiments of catalyst characteristics, various operational variables were tested for the combined catalytic system, such as $NH_3/NO_x$ ratio, temperature, oxygen concentration and $H_2O$. The reaction characteristics of $NO_x$, $NH_3$ and $N_2O$ were analyzed and optimal conditions could be evaluated for the combustion facility with varied load. In terms of $NO_x/NH_3$ simultaneous reduction and $N_2O$ formation suppression, optimal condition was considered NSR 1.2 and temperature $300^{\circ}C$. At this operational condition, $NO_x$ conversion was 98%, $NH_3$ reduction efficiency was 95%, generated $N_2O$ concentration 9.5 ppm with inlet $NO_x$ concentration of 100 ppm. In $NH_3-SCR$ process with $NH_3$ decomposition catalyst, $NO_x$ and $NH_3$ can be considered to be reduced simultaneously at limited conditions. The results of this study may be utilized as basic data at facilities requiring simultaneous $NO_x$ and $NH_3$ reduction for facilities with load variation.
Keywords
Load variation; Selective catalytic reduction; $NO_x$; $NH_3$; $N_2O$; Simultaneous reduction;
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Times Cited By KSCI : 1  (Citation Analysis)
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