Back to Search
Start Over
Effect of different introduction methods of cerium and tin on the properties of titanium-based catalysts for the selective catalytic reduction of NO by NH3.
- Source :
-
Journal of Colloid & Interface Science . May2022, Vol. 613, p320-336. 17p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] This work investigated the influence of introduction methods of cerium and tin on the physicochemical properties as well as the activity and durability of titanium-based catalysts for the selective catalytic reduction of NO by NH 3 (NH 3 -SCR). Precipitation and impregnation methods were adopted to synthesize a series of cerium-tin-titanium catalysts. These catalysts were characterized by XRD, Raman, N 2 adsorption–desorption, HRTEM, EDS mapping, XPS, H 2 -TPR, NH 3 -TPD and in situ DRIFT. Notably, Ce/Sn/Ti(imp) catalyst prepared by stepwise-impregnation method could provide an interface between Ce and Sn for more facile electron transfer than Sn/Ce-Ti(co), Ce/Sn-Ti(co) and Sn/Ce/Ti(imp) catalysts. It promoted the redox equilibrium of Ce4+ + Sn2+ ↔ Ce3+ + Sn4+ shifting to right to produce adequate Ce3+ and surface adsorbed oxygen, resulting in optimal reducibility and surface acidity of Ce/Sn/Ti(imp) catalyst. Besides, the activation of NH 3 and desorption of NO x readily occurred on the surface of Ce/Sn/Ti(imp), which were favorable for the proceeding of subsequent reactions and excellent performance of NH 3 -SCR. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CATALYSTS
*CATALYTIC reduction
*CERIUM
*TIN
*CHARGE exchange
*TITANIUM catalysts
Subjects
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 613
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 155190400
- Full Text :
- https://doi.org/10.1016/j.jcis.2021.11.068