Development of a Methodology to Separate Thermal from Oil Aging of a Catalyst Using a Gasoline-Fueled Burner System

Kinetic model for modern double-layered Pd/Rh TWC as a function of metal loadings and mileage

“…The laboratory aging program employed in this study is a laboratory version of the rapid aging test (RAT) protocol developed originally by GM R&D for the engine-dynamometer testing of TWCs containing Pt, Pd and Rh [14]. The laboratory aging program employed in the present study was well correlated with the engine-dynamometer aged (4 k and 100 k miles) and the field aged mileages (41 k and 98 k miles) of the commercial Pd-based TWCs [8] as clearly demonstrated in Figs.…”

“…All monolith catalysts were stabilized at 600°C for 16 h (4 k mile equivalent) and aged at 900°C for 20, 50 or 100 h to obtain 20 k, 50 k or 100 k mile equivalent aging, respectively, under a periodic lean/rich cyclic (5 s of 3% O 2 /5 s of 3% CO) condition with a background gas containing 10% H 2 O, 10% CO 2 and N 2 balance according to the laboratory aging program [3,13,14]. The laboratory aging program employed in this study is a laboratory version of the rapid aging test (RAT) protocol developed originally by GM R&D for the engine-dynamometer testing of TWCs containing Pt, Pd and Rh [14].…”

Thermal stability of Pd-containing LaAlO3 perovskite as a modern TWC

“…The catalysts were systematically aged by using an in-house laboratory aging system in order to investigate their thermal stability [17,18]. The fresh catalyst was charged into the quartz tubular reactor (1 in.…”