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12th CLEERS Workshop

2009-04-28 - 2009-04-30

Emphasized topic areas:

  • Diesel Particle Filters
  • Selective Catalytic Reduction
  • Lean NOx Traps
  • Oxidation and Reformer Catalysts
  • Emissions Control Systems Integration
  • On-Board Diagnostics


  • Provide technical updates on the latest developments for these technologies and corresponding simulation tools
  • Enhance emissions control collaboration among industry, government and universities
  • Improve and update recognition of key research priorities


CLEERS workshops are intended as relatively informal but tightly focused forums for sharing recent research results on understanding and simulating lean exhaust emissions control. Joint participation by researchers in government, universities, and industry is encouraged. This is the 12th workshop in a series sponsored by the DOE Office of Vehicle Technologies and the DOE Diesel Crosscut Team. The results of the workshop discussions will be documented for the DOE Office of Transportation Technology (OTT) for consideration in improving R&D priorities and technical focus in DOE-supported transportation programs.

About Workshop 12

The 12th CLEERS workshop will be hosted by University of Michigan at their Dearborn Campus in Detroit from April 28th through 30th, 2009. Diesel particulate filters (DPF), selective catalytic reduction (SCR), lean NOx traps (LNTs), oxidation and reformer catalysts and emissions control systems integration will be the major discussion themes. As with the previous CLEERS workshops, this will be a public meeting open to all who are interested in the most recent developments in understanding and simulating the performance of these devices under realistic conditions.

It is expected that the workshop presentations will include invited presentations by internationally prominent researchers. Contributed presentations of 20-30 minutes are also invited from interested parties. Those who are interested in making such presentations should contact one of the following topical coordinators:

  • DPF technology – Mark Stewart, Pacific Northwest National Laboratory, email Mark.Stewart@pnl.gov, phone 509-375-2179 or Chris Rutland, University of Wisconsin, email rutland@engr.wisc.edu, phone 608-262-5853
  • SCR technology – Darrell Herling, Pacific Northwest National Laboratory, email Darrell.Herling@pnl.gov, phone 509-375-6905 or Joe Bonadies, Delphi, email joseph.v.bonadies@delphi.com, phone 810-257-2074
  • LNT technology, Oxidation and Reformer Catalysts, and system integration – Stuart Daw, Oak Ridge National Laboratory, email dawcs@ornl.gov, phone 865-946-1341 or Dick Blint, General Motors, email richard.j.blint@gm.com, phone 586-596-4291

Tuesday, April 28th, 2009

7:30 a.m.Registration/Continental Breakfast
8:00 a.m.Welcome and Introduction
8:15 a.m.Invited Talk: Dual SCR Aftertreatment for Lean NOx ReductionGalen Fisher, Delphi Powertrain Systems
9:15 a.m. Passive Ammonia SCR for Lean SIDI Engines: ExperimentsWei Li, GM R&D Center
9:45 a.m. Passive Ammonia SCR for Lean SIDI Engines: Modeling OverviewKushal Narayanaswamy, General Motors R&D
10:15 a.m.Coffee Break
10:30 a.m. HC-SCR for Diesel NOx Reduction on Supported Metal CatalystsRichard Blint, GM R&D Center
11:00 a.m. Development of Real Time Hybrid Neural Network Catalyst Model for Engine & Powertrain Control DesignSyed Wahiduzzaman, Gamma Technologies
11:30 a.m.On-Site Working Lunch (with discussions and Q&A on morning presentations)
12:30 p.m.Invited Talk: Microkinetic modeling development and use in exhaust gas after-treatment technologiesDion Vlachos, Univ. of Delaware
1:30 p.m. Simulation Supporting the Exhaust Aftertreatment Development Process - 1D Concept and Control Design, 3D Detail OptimizationJohann Christian Wurzenberger, AVL List GmbH
2:00 p.m. Development and Implementation of Experimental Protocol for Steady-State and Transient SCR KineticsTodd Toops, Oak Ridge National Laboratory
2:30 p.m. LNT/SCR SystemJim Parks, Oak Ridge National Laboratory
3:00 p.m.Coffee Break
3:15 p.m.Computational method for determining kinetic rate constants for an SCR modelPraveen Chavannavar, Caterpillar
3:45 p.m.Experimental Studies and Reactor Modeling for NOx Control in Diesel Engines using NH3 and HNCOMaruthi Devarakonda, Pacific Northwest National Laboratory
4:15 p.m.Modeling of multi-layer catalysts and application in deNOx systemGrigorios Koltsakis, Aristotle University Thessaloniki
4:45 p.m.End of first day sessions

Wednesday, April 29th, 2009

7:30 a.m.Registration/Continental Breakfast
8:00 a.m.Welcome and Introduction
8:15 a.m.Invited Talk: DPF Modeling and Experimental Data To Support Model Development: Past Research and Future DirectionsJohn Johnson, Michigan Tech University
9:15 a.m. Computational DPF modeling at PNLMark Stewart, PNNL
9:45 a.m. Intersting dynamics of soot combustion on a planar diesel particulate filterDan Luss, University of Houston
10:15 a.m.Coffee Break
10:30 a.m. Biodiesel blend level impacts on soot oxidation kinetics.Andrea Strzelec, Oak Ridge National Laboratory
11:00 a.m. Development of a 1-D CPF Model to Simulate Active Regeneration of a Diesel Particulate FilterKiran Premchand, Michigan Tech University
11:30 a.m. Analytical solutions for convection, diffusion and chemical reaction in Diesel Particulate FiltersAthanasios Konstandopoulos, APT Lab, CPERI/CERTH
12:00 noonOn-Site Working Lunch (with discussions and Q&A on morning presentations)
1:00 p.m. Micro-Scale Investigation of the Effects of Filtration Velocity and Particulate Matter CharacteristDavid Foster, University of Wisconsin
1:30 p.m. Technical Challenges in the Integration of DPF and SCR Aftertreatment – Review from a Systems PerspeMaruthi Devarakonda, Pacific Northwest National Laboratory
2:00 p.m. Low-dimensional Models for Real Time Simulations of Catalytic After-treatment SystemsVemuri Balakotaiah, University of Houston
2:30 p.m.Panel Discussion: OBDStuart Daw, ORNL
Dick Blint, GM
Marc Allain, Detroit Diesel
Alex Yezerets and Neal Currier, Cummins
John Vangilder, GM
Michiel van Niewstadt, Ford
Mike McCarthy, CARB
4:30 p.m.End of second day sessions
5:30 p.m.No-Host Dinner

Thursday, April 30th, 2009

7:30 a.m.Registration/Continental Breakfast
8:00 a.m.Welcome and Introduction
8:15 a.m.Observations on the performance and control of 2008 Dodge Diesel Ram emissions system over 30,000 milesOwen Bailey, Umicore
8:45 a.m.Hybrid vehicle simulations with LNT NOx controlKalyana Chakravarthy, Oak Ridge National Laboratory
9:15 a.m. Kinetic modelling of sulphur poisoning and regeneration of Lean NOx trapsLouise Olsson, Chalmers
9:45 a.m. NOx Storage-Reduction Characteristics of Lean NOx Trap Catalysts Subjected to Simulated Road AgingMark Crocker, University of Kentucky
10:15 a.m.Coffee Break
10:30 a.m. Effect of High Temperature Lean/Rich Thermal Aging on NOx Storage and Reduction over a Fully-Formulated LNTNathan Ottinger, Oak Ridge National Laboratory
11:00 a.m. Fundamental Studies of NOx Adsorber MaterialsCharles Peden, Pacific Northwest National Laboratory
11:30 a.m. Water gas-shift reaction in LNT operationWilliam Partridge, ORNL
12:00 noonOn-Site Working Lunch (with discussions and Q&A on morning presentations)
1:00 p.m. Stepwise Desulfation and its Impact on LNT Performance - Study of CLEERS Reference CatalystJae-Soon Choi, Oak Ridge National Laboratory
1:30 p.m. Elucidating the Mechanism of NOx Storage and ReductionMichael Harold, University of Houston
2:00 p.m. Microkinetic Modeling of Lean NOx Trap Storage/Regeneration and Sulfation/DesulfationRichard Larson, Sandia National Laboratories
2:30 p.m. The influence of the preparation procedure on the storage and regeneration behavior of Pt and Ba based NOx storage and reduction catalystsLouise Olsson, Chalmers
3:00 p.m. Spatially-Resolved Reactant Species Concentrations in a Model Diesel Oxidation CatalystWilliam Epling, University of Waterloo
3:30 p.m.End of third day sessions


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University Of Michigan – Deaborn
4901 Evergreen Road
Dearborn, MI 48128 United States
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