Abstract
NO x storage and reduction (NSR) catalysts were studied both as a function of cyclic operating conditions and Pt, Ba, and Fe weight loadings via high-throughput experimentation using response surface analysis at T = 648 K . An empirical model was developed to predict the catalyst performance as a function of cycle time, lean fraction of cycle time, and catalyst composition. Using this empirical model for a 0.5 wt% Pt/7.5 wt% Ba/2.5 wt% Fe catalyst, it was found that maximum NO x conversion and selectivity to N 2 was obtained for cycle time between 60 and 125 s and a lean fraction < 0.65 . Fe was found to act as a promoter, extending the region of the complete NO x conversion to lower Pt and Ba weight loadings, as well as acting as an oxidizing agent in the absence of Pt and a storage component in the absence of Ba. Finally, it was found that at higher lean fractions, the catalyst performance was governed by the rate at which the stored nitrates were reduced under fuel rich conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
