2026-10-12T10:42:53Z https://api.figshare.com/v2/oai

oai:figshare.com:article/32641446 2026-10-01T16:23:24Z portal_1172 item_type_8 month_year_10_2026

Factors affecting oxygen storage capacity measurement of three-way automotive catalysts Liam Michael Mc Grane (24169974) PUREID: 642591395 Catalyst oxygen storage automotive catalysts after treatment catalyst testing automotive catalytic convertor Catalytic converters reduce harmful emissions from internal combustion (IC) vehicles. Oxygen Storage Capacity (OSC), enabled by ceria in the catalyst washcoat, supports performance under transient conditions and is a key metric for on-board diagnostics (OBD). This study investigates the effects of tailpipe gases on OSC using full-scale catalyst samples tested on a CATAGEN OMEGA reactor. A new layered OSC model was developed and validated to simulate ageing and the impact of background emissions. Results showed that HC caused up to a 50% increase in measured OSC, CO led to moderate increases, and NOx reduced OSC due to competitive redox reactions.<br><br><i>Thesis embargoed until 31 July 2030.</i> 2026-10-01T16:23:24Z Text Thesis 10.17034/32641446.v1 https://figshare.com/articles/thesis/Factors_affecting_oxygen_storage_capacity_measurement_of_three-way_automotive_catalysts/32641446 All Rights Reserved Open Access after 2030-07-31