Control of heavy-duty diesel particulate emissions using catalyzed ceramic traps. Final report

Technical Report · Mon Jun 01 04:00:00 EDT 1987

OSTI ID:5525247

Ullman, T C

A ceramic particulate filter (trap) was designed as a muffler replacement for application to a GMC RTS II 04 city bus powered by a 2-stroke DDAD 6V-92TAC heavy-duty diesel engine. Preliminary testing indicated that the design was of adequate capacity and filtering efficiency to reduce total particulate by more than 70% and eliminate visible smoke emissions. Three different catalyst formulations were applied to three trap units to enhance on-board trap regeneration. Although some balancing of accumulated particulate with regenerated particulate was obtained below 500C, notable regeneration was not obtained until the catalyzed substrates reached a temperature range of 510 to 550C. The trap units were located before the turbocharger, where high exhaust temperatures, promoted by creating periodic engine upset, could best be utilized for regeneration.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA)
• OSTI ID: 5525247
• Report Number(s): PB-88-133020/XAB; SWRI-8707
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330102 -- Internal Combustion Engines-- Diesel
330705* -- Emission Control-- Particulates
AIR FILTERS
AIR POLLUTION ABATEMENT
CAPACITY
CATALYTIC CONVERTERS
COMPRESSORS
DIESEL ENGINES
DIESEL FUELS
DOCUMENT TYPES
ENGINES
EQUIPMENT
EXHAUST GASES
FILTERS
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PARTICLES
PARTICULATES
PETROLEUM PRODUCTS
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
SUPERCHARGERS
TRAPS
TURBOCHARGERS
WASTES