Back to Search
Start Over
Adverse effects of potassium on NOx reduction over Di-Air catalyst (Rh/La-Ce-Zr)
- Source :
- Applied Catalysis B: Environmental, 259
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- The influence of potassium in Rh on a lanthium promoted zirconia stablised ceria (CZ) catalysts was studied toward NOxreduction reactivity and selectivity. The results are compared with a Rh/CZ catalyst. The samples were characterised by N2 adsorption, XRD, SEM, ICP, and H2-TPR. The study highlighted the importance of stored NOx regeneration over potassium in determining the overall performance of the Rh/K/CZ catalyst. The NOx stored over Rh/K/CZ in the previous NO gas stream cannot be regenerated sufficiently during the C3H6 gas stream, and stored NOxgradually decreased from one cycle to the next, resulting in deteriorating performance of Rh/K/CZ. Besides, problem of NOx slip, the formation of both NH3 and N2O (selectivities up to 30% for each side product) were observed by the addition of potassium into the Rh/CZ catalyst system, depending on the reaction conditions applied and the severity of the catalyst deactivation.
- Subjects :
- Reaction conditions
Process Chemistry and Technology
Potassium
chemistry.chemical_element
02 engineering and technology
NO Reduction
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Catalysis
0104 chemical sciences
Ceria
Adsorption
chemistry
Di-Air
Side product
Cubic zirconia
Rh
0210 nano-technology
Selectivity
NOx
General Environmental Science
Nuclear chemistry
Subjects
Details
- ISSN :
- 09263373
- Volume :
- 259
- Database :
- OpenAIRE
- Journal :
- Applied Catalysis B: Environmental
- Accession number :
- edsair.doi.dedup.....96812bee4dd6bf62c0235699622938c7