TY - JOUR
T1 - Adverse effects of potassium on NOx reduction over Di-Air catalyst (Rh/La-Ce-Zr)
AU - Wang, Yixiao
AU - Makkee, Michiel
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
KW - Ceria
KW - Di-Air
KW - NO Reduction
KW - Potassium
KW - Rh
UR - http://www.scopus.com/inward/record.url?scp=85070605571&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2019.117895
DO - 10.1016/j.apcatb.2019.117895
M3 - Article
AN - SCOPUS:85070605571
SN - 0926-3373
VL - 259
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 117895
ER -