Catalyst Evaluation on a Detroit Diesel Allison 6V-92TA Methanol-Fueled Engine 872138
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.
Citation: McCabe, R., Mitchell, P., Lipari, F., Scruggs, W. et al., "Catalyst Evaluation on a Detroit Diesel Allison 6V-92TA Methanol-Fueled Engine," SAE Technical Paper 872138, 1987, https://doi.org/10.4271/872138. Download Citation
Author(s):
R. W. McCabe, P. J. Mitchell, F. Lipari, W. F. Scruggs, R. C. Warburton
Affiliated:
General Motors Research Laboratories, Physical Chemistry Dept., Warren, MI, General Motors Research Laboratories, Environmental Science Dept., Warren, MI
Pages: 11
Event:
1987 SAE International Fall Fuels and Lubricants Meeting and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Fuel Methanol--A Decade of Progress-PT-36, SAE 1987 transactions: Fuels and Lubricants-V96-7
Related Topics:
Carbon monoxide
Diesel / compression ignition engines
Environmental testing
Catalysts
Emissions certification
Test procedures
Methanol
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