Advanced Diesel Particulate Filtration Systems
I.D. # C0502 Duration 2 Days
As diesel emissions regulations have become more and more stringent, diesel particulate filters (DPF) have become possibly the most important and complex diesel aftertreatment device. This seminar covers many DPF-related topics using fundamentals from various branches of applied sciences such as porous media, filtration and materials sciences and will provide the student with both a theoretical as well as an applications-oriented approach to enhance the design and reliability of aftertreatment platforms. Structure, geometry, composition, performance, applications and optimizations of DPFs are some of the main topics covered in this advanced level seminar. Computer simulation techniques for analysis and optimization of DPF performance are also demonstrated.
Learning Objectives
By attending this seminar, you will be able to:


  • Discuss fundamental, moderate and advanced topics on DPF structure, geometry, composition, performance, applications and optimizations
  • Formulate porosity, permeability, inertial loss coefficient, flow resistance descriptors, different particulate transport modes (diffusional, interceptive), etc. to develop models for predicting backpressure of DPF
  • Recognize different modes of particulate filtration regimes in DPF
  • Select, design, utilize and optimize DPF for various light duty and heavy duty aftertreatment applications
  • Predict, via modeling and simulations, various important DPF performance features (backpressure, peak regeneration temperature, etc.) as well as to analyze their failure modes and thus enhance the reliability of diesel exhaust aftertreatment platform designs

Who Should Attend
This seminar is designed for engineers, scientists, investigators and consultants involved in researching, developing, applications, designing or optimizing diesel exhaust aftertreatment components and systems. Individuals from technical and regulatory institutions as well as individuals from OEMs, suppliers, emissions service companies, research facilities and universities will gain modern knowledge of diesel filter performance.
Prerequisites
Students should have some technical insight into the performance of exhaust emission aftertreatment. Attendees with science or technology background (mechanical/chemical engineering, chemistry, physics) will benefit substantially from this seminar.
Seminar Content
DAY ONE



Porous Media Basics for Diesel Particulate Filters

  • Pore space and structure definitions (definitions of relevant length scales,
    derivation of "pore metrics" such as correlation lengths, lineal path
    distributions.)
  • Simplified representations of structures (unit cell models based on
    granular, cylindrical and composite collectors.)
  • Flow resistance descriptors (Darcy permeability, Forchheimer
    coefficient, inertial loss coefficient as functions of wall micro-geometry, cell
    density, wall thickness, plug length)

Filtration Concepts for Diesel Particulate Filters

  • Particle transport and deposition phenomena -- Condensed vs. vapor phases in diesel exhaust; Diesel fractal soot aggregate basics; Diffusional transport; Thermophoretic transport; Direct interception mechanism; Inertial transport mechanism; Other phenomena (electrical effects, sticking, entrainment by exhaust flow)
  • Continuum filtration theory -- Deep-bed filtration regime; Cake filtration regime reconstruction of filter media
  • True-to-the-geometry representations (digital reconstruction of filter
    media, micro-flow simulation with Lattice-based techniques and discrete particle
    dynamics. Examples applied to granular ceramic extruded filters, sintered metal
    filters, foam filters and fibrous textile filters.)

Diesel Filter Types: Materials and Configurations in Practice

  • Materials aspects

    • Ceramics -- Oxide based: Cordierite, Mullite, other (Tialite/Aluminum Titanate, etc.); Non-oxide based: Recrystalized Silicon Carbide (R-SiC), Siliconized Silicon Carbide (Si-SiC), Silicon Nitride
    • Metallics (high temperature alloys) -- Sintered grains and fibers


  • Configurations

    • Wall-flow honeycombs (square, triangular, symmetric vs. asymmetric channels.)
    • Pleated, foiled (sheet-based) designs
    • Fibrous, textile cartridges
    • Foam-based designs
    • Flow-through particulate collectors


DAY TWO


Applications, Performance Optimization and Modeling of Diesel Particulate Filters

  • Filter backpressure/particulate loading -- Porosity, permeability, pore structure issues; Role of catalyst coatings; Filter size effects (length, diameter, cell density, wall thickness); Microstructure of soot deposits (physical and chemical properties); Soot deposition conditions and role on soot structure: Steady state, transients, cycles; Modeling aspects

  • Filter Regeneration

    • Soot reactivity and structure -- Oxidation mechanisms (thermal, catalytic, NO2); Kinetic descriptions
    • Types of regeneration technologies -- Raising exhaust temperature by post-injection and/or by exhaust-port injection in combination with DOxC; Fuel borne additive-assisted regeneration; Catalyst coating-assisted regeneration; Reactive species-assisted regeneration (NO2-assisted, non-thermal plasma, etc.)

    • Simulation Techniques for Diesel Particulate Filters -- Brief history of DPF performance modeling; Backpressure -- Theory, insights and lessons; Modeling: demonstrations, validations; Regeneration -- Theory, insights and lessons; Modeling: demonstrations, validations

    • Ash Effects -- Ash production, transport, deposition and thermal history; Ash effects on filter thermal management, catalyst activities, and filter sizing
Instructor(s): Athanasios Konstandopoulos and Mansour Masoudi

Dr. Athanasios G. Konstandopoulos, recipient of the 2006 Descartes Laureate, is the founder and head of the Aerosol and Particle Technology Laboratory (APTL), a well-known European diesel emission control laboratory at the Chemical Process Engineering Research Institute (CPERI/CERTH) in Thessaloniki, Greece. In 2006, he was elected as Director of CPERI and member of the Board of Directors of the National Centre for Research and Technology-Hellas (CERTH). Since 2006, he has also been a member of the faculty of Chemical Engineering at Aristotle University in Thessaloniki. Dr. Konstandopoulos is a specialist in combustion aerosols and nanoparticles and he has extensive research and engineering consulting experience in the design, modeling, and testing of diesel particulate filter systems and monolithic reactors. Dr. Konstandopoulos, an SAE Fellow, has authored more than 70 scientific and technical papers and is a frequent invited speaker at conferences throughout the U.S. and Europe. His educational accomplishments include a Diploma in Mechanical Engineering from Aristotle University of Thessaloniki, an M.S. in Mechanical Engineering from Michigan Technological University and an M.S., MPhil and a Ph.D. in Chemical Engineering from Yale University. Dr. Konstandopoulos is the Editor-in-Chief of the journal "Emission Control Science and Technology".



Dr. Mansour Masoudi is the founder of Emissol LLC, an emission control (aftertreatment) company specializing in various automotive powertrain technologies, Research and Development (R&D) with a core specialty in emission reduction and aftertreatment technologies. Throughout his career, he has carried out various responsibilities working on gasoline and Diesel emission control components and systems, including substrate and catalyst technologies, spray injection (fuel, DEF), aftertreatment system design and optimization, testing and validation. He formerly held technology, product and R&D responsibilities at Corning Inc. (Senior Product Engineer), Delphi Corp. (Staff Project Engineer), Bosch Diesel Systems (Senior Engineer), Bosch Emission Systems (Manager, Aftertreatment Systems) and at Paccar (Manager, Advanced Powertrain Technology). He has a Ph.D. in Mechanical and Aerospace engineering, M.S. in Mechanical Engineering and MS. in management. Dr. Masoudi is the Editor-in- Chief of the journal "Emission Control Science and Technology".
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Fees: $1299 SAE Members: $1169
                                                                                

 
CEU 1.3