A SCR Model Calibration Approach with Spatially Resolved Measurements and NH3 Storage Distributions
Abstract
The selective catalytic reduction (SCR) is a technology used for reducing NO x emissions in the heavy-duty diesel (HDD) engine exhaust. In this study, the spatially resolved capillary inlet infrared spectroscopy (Spaci-IR) technique was used to study the gas concentration and NH3 storage distributions in a SCR catalyst, and to provide data for developing a SCR model to analyze the axial gaseous concentration and axial distributions of NH3 storage. A two-site SCR model is described for simulating the reaction mechanisms. The model equations and a calculation method was developed using the Spaci-IR measurements to determine the NH3 storage capacity and the relationships between certain kinetic parameters of the model. Moreover, a calibration approach was then applied for tuning the kinetic parameters using the spatial gaseous measurements and calculated NH3 storage as a function of axial position instead of inlet and outlet gaseous concentrations of NO, NO2, and NH3. The equations and the approach for determining the NH3 storage capacity of the catalyst and a method of dividing the NH3 storage capacity between the two storage sites are presented. It was determined that the kinetic parameters of the adsorption and desorption reactions have to follow certain relationships for the model tomore »
- Authors:
-
- Michigan Technological Univ., Houghton, MI (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Fuels, Engines and Emissions Research Center (FEERC); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Transportation Research Center (NTRC)
- Sponsoring Org.:
- Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1213981
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Emission Control Science & Technology
- Additional Journal Information:
- Journal Volume: 1; Journal Issue: 1; Journal ID: ISSN 2199-3629
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; aftertreatment; selective catalytic reduction (SCR); spaci-IR; NOx reduction; SCR model
Citation Formats
Song, Xiaobo, Parker, Gordon G., Johnson, John H., Naber, Jeffrey D., and Pihl, Josh A. A SCR Model Calibration Approach with Spatially Resolved Measurements and NH3 Storage Distributions. United States: N. p., 2014.
Web. doi:10.1007/s40825-014-0003-6.
Song, Xiaobo, Parker, Gordon G., Johnson, John H., Naber, Jeffrey D., & Pihl, Josh A. A SCR Model Calibration Approach with Spatially Resolved Measurements and NH3 Storage Distributions. United States. https://doi.org/10.1007/s40825-014-0003-6
Song, Xiaobo, Parker, Gordon G., Johnson, John H., Naber, Jeffrey D., and Pihl, Josh A. Thu .
"A SCR Model Calibration Approach with Spatially Resolved Measurements and NH3 Storage Distributions". United States. https://doi.org/10.1007/s40825-014-0003-6. https://www.osti.gov/servlets/purl/1213981.
@article{osti_1213981,
title = {A SCR Model Calibration Approach with Spatially Resolved Measurements and NH3 Storage Distributions},
author = {Song, Xiaobo and Parker, Gordon G. and Johnson, John H. and Naber, Jeffrey D. and Pihl, Josh A.},
abstractNote = {The selective catalytic reduction (SCR) is a technology used for reducing NO x emissions in the heavy-duty diesel (HDD) engine exhaust. In this study, the spatially resolved capillary inlet infrared spectroscopy (Spaci-IR) technique was used to study the gas concentration and NH3 storage distributions in a SCR catalyst, and to provide data for developing a SCR model to analyze the axial gaseous concentration and axial distributions of NH3 storage. A two-site SCR model is described for simulating the reaction mechanisms. The model equations and a calculation method was developed using the Spaci-IR measurements to determine the NH3 storage capacity and the relationships between certain kinetic parameters of the model. Moreover, a calibration approach was then applied for tuning the kinetic parameters using the spatial gaseous measurements and calculated NH3 storage as a function of axial position instead of inlet and outlet gaseous concentrations of NO, NO2, and NH3. The equations and the approach for determining the NH3 storage capacity of the catalyst and a method of dividing the NH3 storage capacity between the two storage sites are presented. It was determined that the kinetic parameters of the adsorption and desorption reactions have to follow certain relationships for the model to simulate the experimental data. Finally, the modeling results served as a basis for developing full model calibrations to SCR lab reactor and engine data and state estimator development as described in the references (Song et al. 2013a, b; Surenahalli et al. 2013).},
doi = {10.1007/s40825-014-0003-6},
journal = {Emission Control Science & Technology},
number = 1,
volume = 1,
place = {United States},
year = {Thu Nov 27 00:00:00 EST 2014},
month = {Thu Nov 27 00:00:00 EST 2014}
}
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Works referenced in this record:
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conference, April 2013
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Works referencing / citing this record:
Diesel Engine SCR Control: Current Development and Future Challenges
journal, May 2015
- Yuan, Xinmei; Liu, Hongqi; Gao, Ying
- Emission Control Science and Technology, Vol. 1, Issue 2