Design Model for Selective Catalytic Reduction Process: Solution of Convective Diffusion and NOx Reaction
Publication: Journal of Environmental Engineering
Volume 124, Issue 12
Abstract
A simple model for the design of selective catalytic reduction (SCR) process is presented. The two-dimensional mass transfer equation shown in Bai and Chwu (1997) is simplified and the analytic solution is obtained. The analytic solution is verified by the solution of the numerical two-dimensional model as well as published experimental data. Then it is applied for the design of the SCR reactor. Effects of operating temperature, inlet molar ratio of NH3/NO, channel pitch, and gas flow rate on the SCR reactor volume are evaluated based on a designed NO removal efficiency. The NH3 slip problem of a given inlet ratio of NH3/NO also is discussed. It is shown that the injection ratio of NH3/NO must be slightly higher than the desired NO removal efficiency so that the reactor volume can be reduced and the problem of NH3 slip is not a major concern.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bai, H., and Chwu, J.-W.(1997). “A theoretical analysis of selective catalytic reduction catalysts.”J. Envir. Engrg., ASCE, 123(5), 431–436.
2.
Beeckman, J. W., and Hegedus, L. L.(1991). “Design of monolith catalysts for power plant NOx emission control.”Ind. Engrg. Chem. Res., 30(5), 969–978.
3.
Binder-Begesteiger, I., Herzog, G. W., Megla, E., and Tomann-Rosos, M.(1990). “Zur kinetic der denox-reaktion an TiO2/WO3-Waben-Katalysatoren.”Chem. Ing. Tech., 62(1), 60.
4.
Bosch, H., and Janssen, F.(1987). “Catalytic reduction of nitrogen oxides—a review of the fundamentals and technology.”Catal. Today, 2(4), 369–532.
5.
Buzanowski, M. A., and Yang, R. T.(1990). “Simple design of monolith reactor for selective catalytic reduction of NO for power plant emission control.”Ind. Engrg. Chem. Res., 29(10), 2074–2078.
6.
Cho, S. M. (1994). “Properly apply selective catalytic reduction for NOx removal.”Chem. Engrg. Progess, (Jan.), 39–45.
7.
Kittrell, J. A., and Eldridge, J. W.(1985). “Novel catalyst preparation method for NOx control.”Envir. Progress, 4(2), 78–84.
8.
Lefers, J. B., Lodder, P., and Enoch, G. D.(1991). “Modelling of selective catalytic denox reactors-strategy for replacing deactivated catalyst elements.”Chem. Engrg. Technol., 14, 192–200.
9.
Nishimoto, Y., Seto, T., Iida, K., Mitsuoka, S., and Iwata, K.(1987). “Update technology of selective catalytic flue gas NOx removal system.”Tech. Rev., 24(1), 54–61.
10.
Shah, R. K., and London, A. L. (1978). Laminar flow forced convection in ducts. Academic Press, New York.
11.
Stiles, A. B., Klein, M. T., Gauthier, P., Schwarz, S., and Wang, J.(1994). “Selective catalytic reduction of NOx in the presence of oxygen.”Ind. Engrg. Chem. Res., 33(10), 2259–2264.
12.
Tronconi, E., and Forzatti, P.(1992). “Adequacy of lumped parameter models for SCR reactors with monolith structure.”AIChE J., 38(2), 201–210.
13.
Tronconi, E., Forzatti, P., Gomez Martin, J. P., and Malloggi, S. (1992). “Selective catalytic removal of NOx: a mathematical model for design of catalyst and reactor.”Chemical Engrg. Sci., 47(9-11), 2401–2406.
Information & Authors
Information
Published In
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Dec 1, 1998
Published in print: Dec 1998
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.