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2020 CLEERS Virtual Workshop

2020-09-14 - 2020-09-18


CLEERS Workshops are annual meetings open to all those who are interested in understanding and simulating the performance of exhaust emission control devices under realistic operating conditions. The Workshops provide an informal, focused forum to:

  • share recent experimental and computational simulation experience with advanced aftertreatment technologies;
  • enhance emissions control research collaborations among industry, universities, and DOE national laboratories; and
  • identify the most pressing pre-competitive research priorities for emissions control.

CLEERS Workshops feature invited presentations by internationally prominent researchers and a moderated discussion with an invited panel of industry experts.

Workshop participants are encouraged to contribute oral presentations and posters on the following (or related) technologies and topics.

Topic Areas


  • Passive NOx adsorbers (PNA)
  • Hydrocarbon traps
  • Selective catalytic reduction (SCR) of NOx by urea/ammonia
  • Oxidation catalysts (DOC, MOC, etc.)
  • Three-way catalysts (TWC)
  • Diesel and gasoline particulate filters (DPF, GPF)
  • Selective catalytic reduction of NOx by hydrocarbons (HC SCR)


  • Identification of reaction mechanisms (from micro-kinetic through global) and kinetic parameters
  • Modeling strategies for improved accuracy and/or reduced computation time
  • Drive cycle simulations of advanced vehicle/emissions control systems
  • Formulation, evaluation, and simulation of catalysts with lower operating temperatures
  • Multifunctional aftertreatment devices: catalyst coated filters, layered/zoned washcoats
  • Integration of engines and emissions controls
  • Durability
  • Reductant (urea or fuel) delivery: spray modeling, decomposition processes, deposit formation

2020 CLEERS Virtual Workshop Agenda

[download agenda as pdf]

Monday, September 14th

11:00 a.m.Welcome and Introduction
11:05 a.m.Invited Talk: Single Atom Catalysts for Emission ControlAbhaya Datye, University of New Mexico
11:55 a.m. Thermally Stable and Highly Active Single-Atom Rhodium on Ceria for NO Abatement under Dry and Industrially Relevant ConditionsKonstantin Khivantsev, Pacific Northwest National Laboratory
12:20 p.m.Break
12:50 p.m. Improving platinum group metal utilization for emission control catalysts through thermally–induced restructuring of core@shell nanoparticlesAlexander Hill, University of Michigan
1:15 p.m. Improved ceria-based support with enhanced Pt-CeO2 interaction leading to higher activity and stability for catalytic emission control reactionsFudong Liu, University of Central Florida
1:40 p.m. Understanding of Low-Temperature CO Oxidation Active Sites on Atomically Dispersed Cu/CeO Synthesized via High-Temperature SynthesisYong Wang, Institute for Integrated Catalysis - Pacific Northwest National laboratory
2:05 p.m.Break
2:35 p.m.Panel Discussion: Utilization of Platinum Group Metals in Emissions Control CatalystsSaeed Alerasool (BASF)
Wilfried Mueller (Umicore)
Yong Wang (WSU/PNNL)
William Epling (University of Virginia)
4:15 p.m.End of first day sessions

Tuesday, September 15th

11:00 a.m.Welcome and Introduction
11:05 a.m.Invited Talk: GPF modeling from pore-scale to the entire devicePetr Koci, University of Chemistry and Technology, Prague, Czech Republic
11:55 a.m. Gasoline Particulate Filter Technology for China6b with RDEMychal Taylor, NGK Insulators, Ltd.
12:20 p.m.Break
12:50 p.m. Improving GPF filtration performance through modeling analysisXin Liu, Ford Motor Company
1:15 p.m. Towards predictive ash accumulation and transport modelingGrigorios Koltsakis, Aristotle University Thessaloniki
1:40 p.m. Hydration of lubricant-derived ash in the wall-flow particle filterCarl Kamp, MIT
2:05 p.m.Break
2:35 p.m. A Discrete DPF Filtration Model Considering Realistic Pore Size DistributionYujun Wang, Cummins Inc.
3:00 p.m. The effect of NO2/NOx ratio on the performance of a SCR downstream of a SCR catalyst on a DPFVenkata Rajesh Chundru, Michigan Technological University
3:25 p.m. Mixed Metal Oxides for NO2 Generation to Enhance SCRoFRobert Henderson, Southwest Research Institute
3:50 p.m. Hydro-Thermal Aging model of NO oxidation on Pt-Pd catalystRama Krishna Dadi, Cummins
4:15 p.m.End of second day sessions

Wednesday, September 16th

11:00 a.m.Welcome and Introduction
11:05 a.m.Invited Talk: System and Architecture Approach to Enable Diesel Engine Emissions ReductionsDanan Dou and Eric Hruby, John Deere
11:55 a.m. Transient Kinetic Analysis of the Reduction Half Cycle in the Standard SCR Redox MechanismEnrico Tronconi, Politecnico di Milano, Italy
12:20 p.m.Break
12:50 p.m. Using in situ electron paramagnetic resonance (EPR) spectroscopy to probe reactivity and relocation of isolated Cu(II) active sites in Cu/SSZ-13 selective catalytic reduction (SCR) catalystsFeng Gao, Pacific Northwest National Laboratory
1:15 p.m. Global kinetic models for reduction and oxidation half-cycles of the NH3-SCR redox cycle: application for quantifying active Cu sites and aging of Cu-zeolite catalystSaurabh Joshi, Cummins Inc.
1:40 p.m. Transient tests to assess the Cu speciation in Cu-CHA catalysts: investigating hydrothermal aging effectsUmberto Iacobone, Politecnico di Milano
2:05 p.m.Break
2:35 p.m. Development of models for NH3 SCR storage and the impacts of hydrothermal agingAustin Ladshaw, Oak Ridge National Laboratory
3:00 p.m. Diesel ATS Aging Correlation StudyHolmes Ahari, FCA
3:25 p.m. HCN formation during NOx removal by NH3-SCR in the exhaust of natural gas enginesDeniz Zengel, Karlsruhe Institute of Technology (KIT), Institute of Chemical Technology and Polymer Chemistry (ITCP)
3:50 p.m.End of third day sessions

Thursday, September 17th

11:00 a.m.Welcome and Introduction
11:05 a.m.Stuart Daw Memorial Presentation: Ammonia Control - The Next Frontier in Automotive Emissions CatalysisAndrew (Bean) Getsoian, Ford Motor Company
11:55 a.m. Global reaction mechanism and kinetic parameters identification for a three-way catalyst model in a system simulation contextSana Loussaief, SIEMENS Digital Industries Software
12:20 p.m.Break
12:50 p.m. Three-way Catalyst Reactivity of Novel High-performance Fuels for SI/ACI Engine Emissions ControlSreshtha Sinha Majumdar, Oak Ridge National Laboratory
1:15 p.m. Strategies for overcoming water inhibition of methane oxidation over palladium-based catalystsPatrick Lott, Karlsruhe Institute of Technology
1:40 p.m. A Novel Honeycomb for both Downsizing and Significant PGM SavingMansour Masoudi, Emissol LLC
2:05 p.m.Break
2:35 p.m.Poster Session #1All Poster Rooms
3:20 p.m.Break
3:30 p.m.Poster Session #2All Poster Rooms
4:15 p.m.End of fourth day sessions
Poster Rooms
Low Temperature Traps Poster Room [view room posters]
Structural Interconversion Between Agglomerated Pd Domains and Isolated Pd2+ Cations in Chabazite ZeolitesTrevor Lardinois, Purdue University
The effects of CO co-feed on a Pd/BEA Hydrocarbon Trap : A Combined Reactor and DRIFTS Study of Pd SpeciationRyan Zelinsky, University of Virginia
MOC & TWC Poster Room [view room posters]
Cobalt as an Efficient Promoter in Low-loading Pd/BEA Catalysts for CH4 OxidationJunjie Chen, University at Buffalo
Effect of lean/rich cycling on catalytic activity of a methane oxidation catalystNatalia Diaz Montenegro, University of Virginia
Structural changes of Rh/Al2O3 during CO oxidationSilvia Marino, University of Virginia
Effect of Slurry Processing on the Properties of Catalytically Active Aerogel MaterialAnn Anderson, Union College
TWC & DOC Poster Room [view room posters]
Effects of Hydrothermal Aging on the Performance of Four Different Formulations of Three way Catalyst in Exhaust Conditions Relevant to Propane EnginesDaekun Kim, University of Tennessee
Low temperature oxidation of novel high-performance fuels on Pt and Pd catalystsFan Lin, Pacific Northwest National Laboratory
Non-catalytic gas-phase NO oxidation in the presence of decaneChih-Han Liu, University at Buffalo
Hydrothermally Stable Pd and Pt/CeO2(core)@ZrO2(shell) Catalysts for Low Temperature TWC ApplicationsChih-Han Liu, University at Buffalo
SCR Catalysts Poster Room [view room posters]
Effects of Cu-Zeolite Topology on the Selective Catalytic Reduction of NOx with NH3Casey Jones, Purdue University
Sulfur poisoning and hydrothermal aging effects on a Cu-SSZ-13 selective catalytic reduction (SCR) catalystYu-Ren Chen, University of Virginia
Kinetic modeling of sulfur poisoning and hydrothermal aging over Cu-SSZ-13 for NH3-SCRLai Wei, Department of Chemical Engineering, University of Virginia
SCR & SCO Poster Room [view room posters]
Identification of the role of metal oxide component of combined metal oxide–SSZ-13 catalysts in improving low-temperature selective catalytic reduction of NOx by ammoniaTahrizi Andana, Pacific Northwest National Laboratory
Fundamental insights into the active sites and kinetics of ammonia oxidation over Cu/SSZ-13 catalystsYiqing Wu, Pacific Northwest National Laboratory
Passive Soot Oxidation Improvement in an SCR Coated DPF Through Adding an Additional SCO CatalystBen Jensen, Pacific Northwest National Laboratory
SCR Systems Poster Room [view room posters]
Predictions of Urea Deposit Formation with CFD using Autonomous Meshing and Detailed Urea DecompositionPengze Yang, Convergent Science Inc.
Aftertreatment Systems and Methods for Treatment of Exhaust Gas from Diesel EngineVenkata Rajesh Chundru, Michigan Technological University

Friday, September 18th

11:00 a.m.Welcome and Introduction
11:05 a.m. Flow and Forced Convection Heat and Mass Transfer Characteristics of Developed Laminar Flow in Channels of Relevance to Emissions Control Devices: Washcoated Monoliths and Asymmetric Particulate FiltersTim Johnson Matthey
11:30 a.m. Effects of Hydrocarbon Structure on Adsorption Energetics on BEA ZeoliteCalvin Thomas, Oak Ridge National Laboratory
11:55 a.m. Condition-Dependent Pd Speciation and NO adsorption in Pd/ZeolitesChristopher Paolucci, University of Virginia
12:20 p.m.Break
12:50 p.m. Effect of Reduction and Re-oxidation on Pd Speciation in Pd-zeolite Passive NOx AdsorbersRobert Pace, University of Kentucky Center for Applied Energy Research
1:15 p.m. Understanding the cyclic behavior of passive NOx adsorbers under low and high concentrations of COJanos Szanyi, Pacific Northwest National Laboratory
1:40 p.m. Understanding the Degradation Mechanism of Pd/zeolite Based Passive NOx Adsorbers: The Interchange Between Particles and CationsKevin Gu, University of Virginia
2:05 p.m.Break
2:35 p.m. Improved NOx Storage Performance from Ethylene with Zeolite-Based Low Temperature NOx Adsorbers: Evidence of a Chemical InteractionJoseph Theis, Ford Motor Company
3:00 p.m. Pd-dilution approaches for more sustainable catalysts for passive NOx adsorptionPranaw Kunal, Oak Ridge National Laboratory
3:25 p.m. Bimetallic PdCo/BEA zeolites for passive NOx adsorptionEleni Kyriakidou, University of Buffalo
3:50 p.m. Improving NOx storage and CO oxidation abilities of Pd/SSZ-13 by increasing its hydrophobicityJaeha Lee, Seoul National University
4:15 p.m.End of fifth day sessions

The 2020 CLEERS Workshop will be held September 14-18, 2020 as a virtual event.  The Workshop will be hosted on the Zoom virtual platform.  Each talk will be presented live via a Zoom meeting at the designated time listed on the Workshop agenda. Instructions on connecting to the Zoom meeting will be emailed to the address provided during registration.

For any questions related to the Workshop, send email to the 2020 CLEERS Workshop Organizing Committee (workshop2020@cleers.org).

Virtual Workshop Dates:September 14-18, 2020
Deadline to submit contributed presentation and poster abstracts:May 15, 2020
Extended deadline to submit contributed presentation and poster abstracts:May 29, 2020
Authors notified of abstract acceptance:July 15, 2020
Registration Deadline:August 31, 2020


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