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2012 CLEERS Workshop

2012-04-30 - 2012-05-02

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Emphasized topic areas:

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


  • Share updates and experience on the latest developments for these technologies and corresponding simulation tools
  • Enhance emissions control collaboration among industry, government and universities
  • Update recognition of key research priorities


CLEERS workshops are intended as 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 15th workshop in a series sponsored by the DOE Office of Vehicle Technologies and the DOE Advanced Engine Crosscut Team. The results of the workshop discussions will be documented for the DOE Office of Transportation Technologies (OTT) for consideration in improving R&D priorities and technical focus in DOE-supported transportation programs.

About the 2012 Workshop

The 2012 CLEERS workshop will be hosted by University of Michigan at their Dearborn Campus in Detroit from April 30th – May 2nd, 2012. Diesel particulate filters (DPF), selective catalytic reduction (SCR), lean NOx traps (LNTs), oxidation and reformer catalysts, hydrocarbon traps, emissions control systems integration and engine-aftertreatment interactions 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.

The workshop agenda will include invited presentations by internationally prominent researchers and an invited panel of experts in integrated vehicle systems simulation. Contributed presentations of 20-30 minutes are also invited from interested parties.

Monday, April 30th, 2012

12:45 p.mRegistration
1:00 p.m.Welcome and Introduction
1:15 p.m.Invited Talk: Development and Validation of a Chemically and Physically Consistent Mathematical Model of Dual-Layer Ammonia Slip CatalystsIsabella Nova, Dip. di Energia, Politecnico di Milano
2:15 p.m. Experimental Characterization of Chabazite-Zeolite SCR Catalyst KineticsJosh Pihl, Oak Ridge National Laboratory
2:40 p.m. Optimal NH3 Storage in SCR CatalystsMaruthi Devarakonda, Pacific Northwest National Laboratory
3:05 p.m.Coffee Break
3:30 p.m. New Insights into the Role of the SCR Catalyst in Coupled LNT-SCR SystemsMark Crocker, Center for Applied Energy Research, U. of Kentucky
3:55 p.m. Chemical and physical properties of small-pore Cu-zeolite catalysts for the selective catalytic reduction of NOx with NH3: Implications for the reaction mechanismCharles Peden, Pacific Northwest National Laboratory
4:20 p.m. Multi-Site Modeling of the Urea/NH3-SCR over Fe-zeolitesStavros Skarlis, IFP Energies Nouvelles
4:45 p.m. Mechanistic Investigation of Ethanol SCR of NOx over Ag/AluminaTodd Toops, Oak Ridge National Laboratory
5:10 p.m. Identification of the active site in Cu/SSZ-13 catalysts for Selective Catalytic Reduction of NOx by NH3 by combining Operando X-ray Absorption Spectroscopy and DFT ModelingFabio Ribeiro, Purdue University
5:35 p.m.End of first day sessions

Tuesday, May 1st, 2012

7:30 a.m.Registration/Continental Breakfast
8:00 a.m.Welcome and Introduction
8:15 a.m.Invited Talk: Future Directions in Diesel SCR SystemsChristine Lambert, Ford Motor Co.
9:15 a.m. Application of an SCR Dynamic ModelNeal Currier, Cummins Inc.
9:40 a.m. NH3 Pulsed Adsorption and SCR Reactions over a Cu-CHA CatalystWilliam Epling, University of Waterloo
10:05 a.m. Coffee Break
10:30 a.m. The effect of Cu-loading on the N2O and NH4NO3 formation for NH3-SCR over Cu-BEA catalystsLouise Olsson, Chalmers University of Technology
10:55 a.m. Spray/Droplet Modeling for SCR AftertreatmentMario F Trujillo, University of Wisconsin
11:20 a.m. An Analysis of DISI Particle MorphologyTeresa Barone, Oak Ridge National Laboratory
11:45 a.m.On-Site Working Lunch (with discussions and Q&A on morning presentations)
1:00 p.m.Panel Discussion: Challenges and Perspectives on Simulating the Relationship Between Emissions Controls and Fuel EfficiencyNeal Currier, Cummins
Houshun Zhang, EPA
Haifeng Liu, GM
Ilya Kolmanovsky, UM
Devesh Upadhyay, Ford
Bernd Krutzsch, Daimler
3:00 p.m. Coffee Break
3:25 p.m. Soot Mass Limit Prediction via Coupled Thermo-Mechanical Stress AnalysisGrigorios Koltsakis, Aristotle University Thessaloniki
3:50 p.m. Stochastic Optimal Control for Advanced Propulsion SystemsAndreas Malikopoulos, Oak Ridge National Laboratory
4:15 p.m. Fuel-Induced System Response Issues: The Role Unconventional Fuels May Play in Altering Exhaust Conditions from Conventional and Low Temperature Modes of CombustionTimothy Jacobs, Texas A&M University
4:40 p.m. Enhancing Stability of Platinum on Silica by Surface Modification-Application to CO OxidationMiyoung Kim, Oak Ridge National Laboratory
5:05 p.m. Development of a Detailed Microkinetic Model for Diesel Emissions Oxidation on PtHom Sharma, University of Connecticut
5:30 p.m.End of second day sessions
6:30 p.m.No-Host Dinner: Park Place Restraunt in Deaborn

May 2nd, 2012

7:30 a.m.Registration/Continental Breakfast
8:00 a.m.Welcome and Introduction
8:15 a.m.Invited Talk: Overview of LNT Modeling ApproachesMilos Marek, Institute of Chemical Technology, Prague
9:15 a.m. Lean NOx Reduction in Dual Layer NSR/SCR CatalystsMichael Harold, University of Houston
9:40 a.m. Impact of thermal and engine ageing on surface morphology and performance of a fully formulated Lean NOx TrapDihya Adouane, Universite Pierre et Marie Curie
10:05 a.m. Coffee Break
10:30 a.m.Kinetic study on soot oxidation by simulated diesel gas emissionsHeeJe Seong, Argonne National Laboratory
10:55 a.m.Emissions from ethanol-gasoline blends: physical and chemical characterization of SIDI engine particulatesChethan Kumar Gaddam, The Pennsylvania State University
11:20 a.m.Impact of Thermal Aging on Catalytic Diesel Particulate Filter PerformanceAthanasios Konstandopoulos, Aerosol and Particle Technlogy Lab
11:45 a.m.On-Site Working Lunch (with discussions and Q&A on morning presentations)
1:00 p.m.Invited Talk: Fundamental Processes Controlling Ash Accumulation in Disesel Particulate Filters and Impacts on DPF PerformanceAlexander Sappok, MIT
2:00 p.m. The DAAAC Protocol for Accelerated Aging of Diesel Aftertreatment SystemsGordon Bartley, Southwest Research Institute
2:25 p.m. Methodology for Estimating Ea for Catalyst DeactivationBukky Oladipo, Umicore
2:50 p.m.Coffee Break
3:15 p.m. Study of Emission and Fuel Consumption Trade-offs of a Diesel Engine System Equipped with Electrically Heated CatalystsWen Wang, Gamma Technologies
3:40 p.m. Better Friction Factors and Nusselt Numbers for DPFs and When Not to Use Them at AllEdward Bissett, Gamma Technologies
4:05 p.m. Exhaust Filtration for High Number EfficiencyMark Stewart, PNNL
4:30 p.m. Micro-scale Investigation of Ash Accumulation process in a Diesel Particulate FilterSandeep Viswanathan, Engine Research Center, UW-Madison
4:55 p.m.End of third day sessions
Wrap up and adjourn


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