0

Full Content is available to subscribers

Subscribe/Learn More  >

Simulation of NOx Reduction in an Ammonia-SCR System With an Fe-Zeolite Catalyst and Calibration of Related Parameters

[+] Author Affiliations
L. Sharifian, Y. M. Wright, K. Boulouchos

Swiss Federal Institute of Technology Zürich (ETH Zürich), Zürich, Switzerland

M. Elsener, O. Kröcher

Paul Scherrer Institut, Villigen PSI, Switzerland

Paper No. IMECE2010-40431, pp. 597-607; 11 pages
doi:10.1115/IMECE2010-40431
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 11: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4448-9
  • Copyright © 2010 by ASME

abstract

NOx reduction in a single representative channel of an SCR converter is modeled accounting for convective mass transfer along the channel, diffusive mass transfer and chemical reactions within the catalytic layer, coupled via mass transfer boundary condition at the wall. The proposed 1D+1D code for the channel has different parameters involving rate expression constants for the surface chemistry and properties of the catalytic and washcoated layer. A comprehensive set of experimental data on the Fe-Zeolite washcoated monolith was available for different feed concentrations, temperatures and flow rates. A genetic algorithm was used as an optimization technique to calibrate the model parameters by minimizing the error between simulation results and transient responses of the real system. Dynamic tests showing the response of the system during fast transients were subsequently used to assess the predictive quality of the model with the calibrated parameters. In particular, different rate expressions for the surface reactions were compared to find the best fit for the tested catalyst, providing insight with respect to the importance of the different reaction pathways and the chemico-physical properties of the system. Based on the findings, an optimization strategy could be proposed both in terms of sequence as well as minimum required experimental tests for each sub-system according to the parameters which can be determined separately.

Copyright © 2010 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In