A Reaction Kinetic for Selective Catalytic Reduction of NOx with NH3 over Manganese Oxide (NMO, MnO2, Mn2O3) at Low Temperature 


Vol. 24,  No. 4, pp. 307-314, Dec.  2018
10.7464/ksct.2018.24.4.307


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  Abstract

In this study, NMO (Natural Manganese Ore), MnO2, and Mn2O3 catalysts were used in the selective catalytic reduction process to remove nitrogen oxides (NOx) using NH3 as a reducing agent at low temperatures in the presence of oxygen. In the case of the NMO (Natural Manganese Ore), it was confirmed that the conversion of nitrogen oxides in the stability test did not change even after 100 hours at 423 K. The Kinetics experiments were carried out within the range where heat and mass transfer were not factors. From a steady-state Kinetics study, it was found that the low-temperature SCR reaction was zero order with the respect to NH3 and 0.41 ~ 0.57 order with the respect to NO and 0.13 ~ 0.26 order with the respect to O2. As temperature increases, the reaction order decreases as a result of NH3 and oxygen concentration. It was confirmed that the reaction between the NH3 dissociated and adsorbedon the catalyst surface and the gaseous nitrogen monoxide (E-R model) and the reaction with the adsorbed nitrogen monoxide (L-H model) occur.

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  Cite this article

[IEEE Style]

K. MS and H. SC, "A Reaction Kinetic for Selective Catalytic Reduction of NOx with NH3 over Manganese Oxide (NMO, MnO2, Mn2O3) at Low Temperature," Clean Technology, vol. 24, no. 4, pp. 307-314, 2018. DOI: 10.7464/ksct.2018.24.4.307.

[ACM Style]

Kim MS and Hong SC. 2018. A Reaction Kinetic for Selective Catalytic Reduction of NOx with NH3 over Manganese Oxide (NMO, MnO2, Mn2O3) at Low Temperature. Clean Technology, 24, 4, (2018), 307-314. DOI: 10.7464/ksct.2018.24.4.307.

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