Assessing catalytic converter degradation in emission reduction: comparative study of co, THC, and NOx across mileage, engine capacity, and transmission type

Hasan Basri and Akhmad Andriyan Nugroho and Ayu Pratiwi and Jong, So Rhee and Farrah Anis Fazliatul Adnan and Dianta Ginting (2025) Assessing catalytic converter degradation in emission reduction: comparative study of co, THC, and NOx across mileage, engine capacity, and transmission type. Borneo Science, 46. pp. 1-20. ISSN 1394-4339

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Abstract

Environmental concerns have led to stricter global emission standards for combustion engine vehicles. This study evaluates the degradation patterns of catalytic converters in reducing CO, THC, and NOx emissions across 20 passenger vehicles with varying mileage (up to 100,000 km), engine capacities (1.2 - 1.5L), and transmission types (manual/automatic). Four catalytic converter designs (Types A-D) were assessed using the New European Driving Cycle (NEDC) methodology for compliance with Indonesian and EURO-4 standards. Results revealed that Type D converters maintained the best performance for CO (0.2 - 0.4 g/km) and THC emissions (0.02 - 0.04 g/km) with stable degradation across their lifespan. Conversely, Type B exhibited significant degradation (degradation factor 9.0) and higher emission levels overall. Statistical analysis showed significant differences in THC emissions between converter types (p < 0.05), while differences in CO and NOx were not statistically significant (p > 0.05). NOx emissions showed the highest degradation factor (5.78) across all converter types. This research demonstrates the critical relationship between catalytic converter design, vehicle operational parameters, and emission reduction effectiveness over time, providing insights for future catalyst material development and maintenance strategies to maintain long-term environmental compliance.

Item Type:	Article
Keyword:	Catalytic converter, Emission performance, Vehicle emissions, Emission reduction, Automotive emissions contro
Subjects:	T Technology > T Technology (General) > T1-995 Technology (General) T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL1-4050 Motor vehicles. Aeronautics. Astronautics
Department:	FACULTY > Faculty of Science and Natural Resources
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	21 Aug 2025 11:11
Last Modified:	21 Aug 2025 11:11
URI:	https://eprints.ums.edu.my/id/eprint/45014

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