Retrofit Emission Controls for On-Road Diesel Engines

OCA Air Quality SummitFresno, CA

October 27, 2005

Manufacturers of Emission Controls Associationwww.meca.org

Retrofit Emission Control Technologies:Building an Impressive Experience Base

Diesel Particulate FiltersDiesel Oxidation Catalysts

Flow through monolithwith catalytic coating

COAldehydes

HCPAHSO2

NOx

CO2

H2OSO2 /SO3

NOx

Level 1 PM Reduction Large Reduction in Toxics Nearly Universal Application with > 1 Million Retrofits Worldwide Tens of Millions of OE Applications

Level 3 PM Reduction Large Reduction in Toxics > 200,000 Retrofits Worldwide > 1 Million OE Applications

Experience with Diesel Particulate Filter RetrofitsSpans a Variety of On-Road Vehicle Applications

Retrofit Options for PM Control Expanding

DPF

Exhaust gas

Diesel vapor

DOC

Fuel Injection Unit

• Filter systems with active regenerationfor cool exhaust applications– Diesel fuel provides regeneration heat source– Other “active” options can include electric heaters, fuel

burners

• Open or “partial” filters using wire mesh or sintered metal sheets– Level 2 PM reduction

potential

• Closed crankcase filters foradditional PM control

Heat

Integrated Solutions for Combined PM/NOx Reductions Available for Retrofit

Emulsified Diesel Fuel + DOC or DPF – 15-40% NOx reduction

Low Pressure EGR + DPF – 40-60% NOx reduction

Lean NOx Cat. + DPF or DOC – 25-35% NOx reduction

SCR catalyst

Pre-catalyst

Slipcatalyst

NH3 injection

Exhaust gases

DOC + SCR – 70-80% NOx reduction

Key Considerations for Successful Retrofit Programs

• Application engineering

• Installation

• On-vehicle monitors

• Maintenance

Successful Retrofits Require a Team Effort Between Fleet Owners, Operators, and Technology Providers

Emission Control Industry’s Perspective on Retrofits

• Proven Technology Available• Technology Options Expanding• Application Range Expanding• Retrofit “Success” Builds on Experience Checklist• Incentive Funds Needed to Make Large Impact

on Air Quality• Technology Verification Important but Must Be

Resourced and Streamlined to Deliver Product to the Market at a Faster Pace

www.dieselretrofit.org