TECHNICAL DESIGN OF EXHAUST GAS FILTERS. VOLUME 2 THE EFFECT OF CATALYSTS ON DIESEL EXHAUSTS

TEKNISK UTFORMNING AV AVGASRENARE. DELRAPPORT 2. KATALYSATORERS EFFEKT PAA DIESELAVGASER

The aim of this study was to provide a basis for evaluation of how different designs, dimensions of catalysts affect the composition of exhaust fumes. The tests were carried out on commonly used systems employing a Volvo D 96 B diesel engine loaded by a Schenk eddy current brake. Catalytic converters of the pellet type employed radial or vertical flow whereas monolithic converters employed axial flow. Anlaysis of carbon monoxide, carbon dioxide, hydrocarbon and nitrogen oxides was carried out. Air and fuel consumption were registered together with exhaust gas temperature. The following results were obtained. Catalysis of CO and HC combustion increases strongly with the temperature and reaches a threshold value. Different catalysts require different temperature for the elimination of CO and HC. All converters provide maximum co elimination at 300 deg C, the most effective at 200 deg C. All converters provide maximum HC elimination at 400 deg C, the most effective at 300 deg C: considerable differences between NO and NO2 were found, but total NOx was influenced marginally. The most effective CO/HC catalyst gives the highest NO2 values. At idling the pellet converters provide the best long term effect on CO/HC, they also have better effect on nitrogen oxides, both absorption of NOx and reduction of NO2 to NO. /TRRL/

• Corporate Authors:

  Lulea University, Sweden

  S-95187 Lulea,   Sweden 
• Authors:
  • Rehnberg, O
• Publication Date: 1978-10

Language

• Swedish

Media Info

• Features: Figures; References; Tables;
• Pagination: 28 p.

Subject/Index Terms

• TRT Terms: Carbon dioxide; Carbon monoxide; Catalytic converters; Combustion; Diesel engines; Exhaust gases; Fuel air mixtures; Hydrocarbons; Nitric oxide; Nitrogen oxides; Temperature
• ITRD Terms: 7393: Carbon dioxide; 7391: Carbon monoxide; 7127: Catalysis; 9011: Design (overall design); 1314: Diesel engine; 9014: Dimension; 9020: Evaluation (assessment); 7367: Hydrocarbon; 7128: Nitrogen; 7372: Oxide; 9149: Prevention; 6722: Temperature; 6255: Test
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00302579
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Rapport 1978:47 T Monograph
• Files: ITRD, TRIS
• Created Date: Dec 19 1979 12:00AM