Abstract
NO/O2 and NO/C3H6/O2 reactions were investigated over barium hexaaluminogallate (Ba (Al, Ga)12O19 and BaCo (Al, Ga)11O19) with Al/Ga=9/3, 6/6 and 3/9 ratios. BaCo(Al, Ga)11O19 was synthesized by crystallization at 1100°C via the coprecipitation precursor powders prepared by aqueous metal nitrates and ammonium carbonate. The NOx conversion amount in the NO/O2 reaction over all hexaaluminogallates was less than 10%. The addition of C3H6 as a reductant gas significantly improved the NOx conversion over BaCo(Al, Ga)11O19 in excess oxygen compared with that in the case of Ba(Al, Ga)12O19. The Al/Ga ratio influenced the morphologies and catalytic activities of hexaaluminogallate powders. With increasing Al/Ga ratio, the NOx reduction with C3H6 to N2 increased up to 40% and 28% for BaCo(Al, Ga)11O19 powders and Ba(Al, Ga)12O19 powders, respectively. Highly dispersed Co species are effective in accelerating the NO activation step in selective reduction with C3H6.
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.
