skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process

Abstract

The reaction kinetics over a V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalyst which can describe the NH{sub 3} slip from a selective catalytic reduction (SCR) reactor as well as the maximum conversion of NO over a wide range of reaction temperatures was developed to design the SCR process. The modeling of the reactor based upon the kinetics developed in the present study was successfully accomplished by the inclusion of the effect of diffusion resistance in the honeycomb reactor model. The honeycomb reactor model could directly employ the kinetic parameters obtained from the kinetic study over a packed-bed flow reactor. The model could also predict the effects of the catalytic wall thickness on the honeycomb reactor and the pore structure of the catalyst on the NO removal activity and NH{sub 3} slip, regardless of the types of the honeycomb, washcoated or extruded. The present study also identified that the diffusion resistance in the honeycomb reactor plays a critical role in the design of the commercial-scale SCR reactor despite the relatively thin catalyst layer of the reactor. Moreover, the diffusion effect was more significant for a CuHM catalyst primarily containing micropores than for a V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalyst primarily containing mesopores.more » The flow pattern and the NH{sub 3} distribution in the commercial-scale honeycomb reactor are also important for a high performance of NO removal. Good distribution of the flow by the guide vanes installed in the reactor can improve the NO removal activity by more than 10% of NO conversion.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Pohang Univ. of Science and Technology (KR)
OSTI Identifier:
20076066
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 39; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0888-5885
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; NITRIC OXIDE; SELECTIVE CATALYTIC REDUCTION; CATALYSTS; POLLUTION CONTROL EQUIPMENT; COMPUTER-AIDED DESIGN; MATHEMATICAL MODELS; AMMONIA; CHEMICAL REACTION KINETICS

Citation Formats

Chae, H.J., Choo, S.T., Choi, H., Nam, I.S., Yang, H.S., and Song, S.L. Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process. United States: N. p., 2000. Web. doi:10.1021/ie9907270.
Chae, H.J., Choo, S.T., Choi, H., Nam, I.S., Yang, H.S., & Song, S.L. Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process. United States. doi:10.1021/ie9907270.
Chae, H.J., Choo, S.T., Choi, H., Nam, I.S., Yang, H.S., and Song, S.L. Mon . "Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process". United States. doi:10.1021/ie9907270.
@article{osti_20076066,
title = {Direct use of kinetic parameters for modeling and simulation of a selective catalytic reduction process},
author = {Chae, H.J. and Choo, S.T. and Choi, H. and Nam, I.S. and Yang, H.S. and Song, S.L.},
abstractNote = {The reaction kinetics over a V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalyst which can describe the NH{sub 3} slip from a selective catalytic reduction (SCR) reactor as well as the maximum conversion of NO over a wide range of reaction temperatures was developed to design the SCR process. The modeling of the reactor based upon the kinetics developed in the present study was successfully accomplished by the inclusion of the effect of diffusion resistance in the honeycomb reactor model. The honeycomb reactor model could directly employ the kinetic parameters obtained from the kinetic study over a packed-bed flow reactor. The model could also predict the effects of the catalytic wall thickness on the honeycomb reactor and the pore structure of the catalyst on the NO removal activity and NH{sub 3} slip, regardless of the types of the honeycomb, washcoated or extruded. The present study also identified that the diffusion resistance in the honeycomb reactor plays a critical role in the design of the commercial-scale SCR reactor despite the relatively thin catalyst layer of the reactor. Moreover, the diffusion effect was more significant for a CuHM catalyst primarily containing micropores than for a V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalyst primarily containing mesopores. The flow pattern and the NH{sub 3} distribution in the commercial-scale honeycomb reactor are also important for a high performance of NO removal. Good distribution of the flow by the guide vanes installed in the reactor can improve the NO removal activity by more than 10% of NO conversion.},
doi = {10.1021/ie9907270},
journal = {Industrial and Engineering Chemistry Research},
issn = {0888-5885},
number = 5,
volume = 39,
place = {United States},
year = {2000},
month = {5}
}