TY - JOUR
T1 - Development of zirconia-based oxide sorbents for removal of NO and NO2
AU - Matsukuma, Izumi
AU - Kikuyama, Suzue
AU - Kikuchi, Ryuji
AU - Sasaki, Kazunari
AU - Eguchi, Koichi
N1 - Funding Information:
A part of this work was supported by a Grant-in-Aid for Scientific Research from Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2002/6/8
Y1 - 2002/6/8
N2 - Zirconia-based oxide sorbents for NOx has been investigated to clarify the role of additives. Addition of yttria to Mn-Zr oxide improved the sorption capacity due to enhanced basicity and larger surface area. A Small amount of transition metal oxide as additives was effective in promoting the sorption-desorption capability. A small addition of Mn or Co to ZrO2 was effective in achieving reversible sorption and desorption of NOx due to their activity as a reduction-oxidation catalyst. These oxides were active for the oxidation of NO to nitrate ions via NO2 in an oxidizing atmosphere and reduction of nitrate ions in the presence of a gaseous reductant. The NOx sorptive capacities of Mn-containing sorbents were significantly deteriorated in dilute SO2. The NOx sorption capacity of 0.5 wt.% Co/ZrO2 was lowered only slightly in the initial stage of NO2 sorption with dilute SO2.
AB - Zirconia-based oxide sorbents for NOx has been investigated to clarify the role of additives. Addition of yttria to Mn-Zr oxide improved the sorption capacity due to enhanced basicity and larger surface area. A Small amount of transition metal oxide as additives was effective in promoting the sorption-desorption capability. A small addition of Mn or Co to ZrO2 was effective in achieving reversible sorption and desorption of NOx due to their activity as a reduction-oxidation catalyst. These oxides were active for the oxidation of NO to nitrate ions via NO2 in an oxidizing atmosphere and reduction of nitrate ions in the presence of a gaseous reductant. The NOx sorptive capacities of Mn-containing sorbents were significantly deteriorated in dilute SO2. The NOx sorption capacity of 0.5 wt.% Co/ZrO2 was lowered only slightly in the initial stage of NO2 sorption with dilute SO2.
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U2 - 10.1016/S0926-3373(01)00329-0
DO - 10.1016/S0926-3373(01)00329-0
M3 - Article
AN - SCOPUS:0037042556
VL - 37
SP - 107
EP - 115
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
IS - 2
ER -