Advanced Combustion Catalyst and Aftertreatment Technologies (AC2AT)

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The vision of AC2AT is to provide a collaborative environment for the fundamental evaluation and application of novel catalyst technologies. This focus on collaborative, non-competitive research enables multiplication of research funds for client members.

 
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Deposit formation in the decomposition reactor remains a significant challenge to aftertreatment system designers due to the complexity of the contributing factors. One of the program objectives of AC2AT is to identify urea derived deposit formation pathways and model deposit formation in the emission control system.

 
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The development of aftertreatment system simulation tools, which accurately simulate full aftertreatment system performance, will enable streamlined emission control system design and development.

 
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A wide variety of fundamental aftertreatment R&D topics are proposed to further our understanding of current state-of-the-art emission control devices in order to enable optimized aftertreatment system integration.

 
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SwRI has launched a joint industry consortium focused on catalyst and emission control technologies for advanced internal combustion engines.


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Group members at the AC2AT PAC meeting held June 27-28, 2016. Consortia members are apprised of project developments, future consortia goals and engage directly with SwRI staff regarding AC2AT.

The next PAC meeting is scheduled for October 18-19, 2016 on SwRI’s campus in San Antonio, TX.

The Advanced Combustion Catalyst and Aftertreatment Technologies (AC2AT) program focuses on improving the automotive industry’s understanding of catalysts and emission control systems. This multi- faceted research consortium is leading projects that improve the effectiveness and durability of current aftertreatment systems, as well as developing novel technologies to reduce criteria pollutant emissions and improve fuel efficiency. The consortium includes clients from around the world representing catalyst formulators, substrate and component manufacturers, emission control system integrators and engine and vehicle manufacturers. The main objective of the program is to develop the tools and technologies necessary for the synergistic application of catalysts to advanced engine technologies. This consortium provides a collaborative environment for the fundamental evaluation of advanced combustion engine emissions and novel catalyst technologies. The consortium will include clients representing catalyst formulators, substrate and component manufacturers, emission control system integrators and engine and vehicle manufacturers. The focus of the program will be to develop the tools and technologies necessary for the synergistic application of catalysts to advanced engine technologies. This consortium will provide a collaborative environment for the fundamental evaluation of advanced combustion engine emissions and novel catalyst technologies. The AC2AT PAC meeting is scheduled for October 18-19, 2016, at SwRI in San Antonio, TX.

Current Consortium Members

  • Bosch
  • Cummins, Inc
  • Denso
  • Doosan
  • Eberspaecher
  • Honda
  • John Deere
  • Komatsu
  • Scania
  • Tenneco
  • Volvo

4 Main Projects are Currently Being Executed as Part of the Consortium

  • Urea-SCR Performance and Deposit Modeling
    • Goal is to improve current state-of-the-art capabilities of emission control system analysis led design by developing new simulation tools to more accurately predict emission control system performance without the need for fabrication of system hardware. This project focuses on the mechanisms behind urea deposit formation and mitigation, and SCR operatives via surface reactions. The overall objective of this project is to develop a full predictive 3D urea-SCR aftertreatment system model that accurately predicts urea deposit formation, growth, and composition that is coupled to a high fidelity semi-3D SCR simulation that models complete SCR system performance. Validation of the CFD model is being conducted by characterizing various urea dosing system architectures.
  • Detailed characterization of emissions from advanced combustion engines
    • Goal is to understand the detailed chemical composition of emissions from advanced technology combustion systems. These combustion systems are of interest to engine manufacturers for their potential for reduced fuel consumption. In order to design and develop optimal emission control systems, the detailed emission chemistry must be well understood.
  • Low temperature catalysis and emission control system design
    • Goal is to propose and evaluate potential solutions for treating exhaust gas emissions at temperatures less than 200°C. Increasingly stringent emission regulations and highly efficient engine operation are resulting in an increased requirement for low temperature catalysis. This project is developing new catalyst and system level strategies to improve low temperature performance for conventional and advanced combustion regimes.
  • Model development for predicting ash emission rates and impact on emission control
    • Goal is to develop detailed models to predict the emissions of ash from internal combustion engines based on location and rate of oil ingestion. Model includes prediction of ash physical/chemical properties and the impact on aftertreatment components including DOC, DPF, SCRF, SCR, GPF, TWF, etc.

Engine Test Bench Facilities Available

  • Compression Ignition Test Facility
    • 15 L Cummins ISX
      • Dilute lean combustion
    • 13 L Navistar Maxxforce
      • Dilute lean combustion
      • Lean dual fuel Natural Gas/Diesel
      • RCCI
    • 6.8 L John Deere PSS6068
      • Dilute lean combustion
    • 1.9 L GM JTD
      • Dilute lean combustion
      • RCCI
  • Spark-Ignited Test Facility
    • 11.9 L Cummins ISX12 G
      • Low pressure loop EGR
      • Natural gas
    • 2.0 L GM LHU
      • Dedicated EGR®
      • Gasoline
      • Natural Gas
      • Propane
    • 1.6 L PSA EP6DT
      • Low pressure loop EGR
      • Gasoline
  • Aftertreatment R&D Test Facility
    • 6.7 L Cummins ISB
      • Accelerated ash loading

Analytical Emissions Laboratories

Catalyst Evaluation Test Facilities

  • Universal synthetic gas reactor
  • FOCAS® Hot Gas Test Rig (HGTR®)
  • Spatially resolved capillary FTIR/MS
  • DRIFTS surface chemistry analysis
  • Transmission Electron Microscopy (TEM)
  • Proton Induced X-Ray Emission (PIXE)
  • Scanning Electron Microscopy (SEM)
  • X-Ray Diffraction (XRD)
  • BET surface area
  • DPF inspection
    • Bore scope
    • Ultrasound
    • CT-SCAN

Consortium Contractual Details

  • 4 year consortium, renewable on an annual basis
  • Interested parties can join the consortium any time during the four-year period
  • SwRI will aggressively pursue patents for technology developed as part of AC2AT
  • All consortium participants are granted a royalty-free to all SwRI technology developed under the consortium
  • Annual membership fee of $95,000 USD
  • Impact of annual contribution is multiplied by number of members in consortium
  • SwRI’s internal research funds will supplement contributions from annual client dues, and data will be shared with consortium members

Related Terminology

aftertreatment  •  ash  •  catalyst  •  CH4  •  methane  •  component suppliers  •  DEF  •  diesel exhaust fluid  •  DOC  •  diesel oxidation catalyst  •  diesel engine technology  •  DPF  •  diesel particulate filter  •  dual fuel  •  exhaust gas recirculation  •  EGR  •  emission control  •  emission requirements  •  emission standards  •  EPA  •  exhaust  •  gasoline engine  •  gasoline engine technology  •  GPF  •  gasoline particulate filter  •  heavy-duty engine manufacturers  •  high-efficiency dilute  •  light-duty vehicles  •  lower emission levels  •  motor vehicles  •  natural gas  •  nox  •  oxides of nitrogen  •  oil and fuel companies  •  PM  •  particulate mass  •  PN  •  particulate number  •  RCCI  •  SCR  •  selective catalytic reduction  •  stream reforming  •  TWC  •  three way catalyst  •  urea  •  waste heat recovery

Benefiting government, industry and the public through innovative science and technology
Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 10 technical divisions.
08/12/16