OB08 Effects of Ba-Carbonate/Carboxylate Surface Species on the NOx Storage Capacity of Pt/Ba/Al2O3 Lean NOx Traps

Monday, June 6, 2011: 1:50 PM
Columbus Ballroom (Detroit Marriott Hotel at the Renaissance Center )
Vincent F. Kispersky1, Saurabh S. Chaugule2, Aleksey Yezerets3, Neal W. Currier4, Fabio H. Ribeiro1 and W. Nicholas Delgass1, (1)Chemical Engineering, Purdue University, West Lafayette, IN, (2)School of Chemical Engineering, Purdue University, West Lafayette, IN, (3)Corporate Research and Technology, Cummins Inc, Columbus, IN, (4)Cummins Inc, Columbus, IN
The state of Ba on LNTe before storage occurs has important effects on the NOx storage capacity.  Highly dispersed Ba adsorbs CO2 as less stable carboxylates, reducing overall competition for available Ba storage sites. By maximizing the presence of such a Ba phase, negative effects of CO2 could be mitigated.

Extended Abstracts: