Catalyst evaluation on a detroit diesel Allison 6V-92TA methanol-fueled engine
The fresh catalytic activities of both a production Pt-Pd catalyst and a GMR Pd-promoted Ag catalyst were evaluated in back-to-back emissions tests on an experimental Detroit Diesel Allison (DDA) 6V-92TA methanol-fueled engine. Both the 13-mode steady-state and transient heavy-duty diesel engine Federal Test Procedures were employed. The production catalyst was characterized by relatively high conversions (70-90%) of unburned methanol and carbon monoxide in both the transient and 13-mode tests. However, the production catalyst promoted the partial oxidation of unburned methanol to formaldehyde, as indicated by large negative apparent conversions of formaldehyde in both the transient and steady-state tests (-77% transient; -188% 13-mode). In contrast, the Pd-promoted Ag catalyst converted formaldehyde with good efficiency (--90% in the 13-mode test and --50% in the hot transient test) but was much less efficient than the production catalyst for converting unburned methanol and carbon monoxide.
- OSTI ID:
- 5167224
- Report Number(s):
- CONF-871142-
- Resource Relation:
- Conference: International fuels and lubricants meeting and exposition, Toronto, Canada, 2 Nov 1987; Other Information: Technical Paper 872138
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
CATALYTIC CONVERTERS
PERFORMANCE
DIESEL ENGINES
EMISSION
METHANOL
FUEL SUBSTITUTION
PLATINUM ALLOYS
CATALYTIC EFFECTS
AIR POLLUTION CONTROL
CARBON MONOXIDE
CATALYSTS
CHEMICAL REACTION KINETICS
DIESEL FUELS
FORMALDEHYDE
PALLADIUM ALLOYS
SILVER ALLOYS
ALCOHOLS
ALDEHYDES
ALLOYS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CONTROL
ENGINES
EQUIPMENT
HEAT ENGINES
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
KINETICS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PLATINUM METAL ALLOYS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
090110* - Hydrocarbon Fuels- Properties- (1979-1989)
330702 - Emission Control- Carbon Monoxide
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)