Development of zirconia-based oxide sorbents for removal of NO and NO2

Izumi Matsukuma; Suzue Kikuyama; Ryuji Kikuchi; Kazunari Sasaki; Koichi Eguchi

doi:10.1016/S0926-3373(01)00329-0

Development of zirconia-based oxide sorbents for removal of NO and NO₂

Izumi Matsukuma, Suzue Kikuyama, Ryuji Kikuchi, Kazunari Sasaki, Koichi Eguchi

Hydrogen Utilization Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Zirconia-based oxide sorbents for NO_x 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 NO_x 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 NO_x sorptive capacities of Mn-containing sorbents were significantly deteriorated in dilute SO₂. The NO_x sorption capacity of 0.5 wt.% Co/ZrO₂ was lowered only slightly in the initial stage of NO₂ sorption with dilute SO₂.

Original language	English
Pages (from-to)	107-115
Number of pages	9
Journal	Applied Catalysis B: Environmental
Volume	37
Issue number	2
DOIs	https://doi.org/10.1016/S0926-3373(01)00329-0
Publication status	Published - Jun 8 2002

All Science Journal Classification (ASJC) codes

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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title = "Development of zirconia-based oxide sorbents for removal of NO and NO2",

abstract = "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.",

author = "Izumi Matsukuma and Suzue Kikuyama and Ryuji Kikuchi and Kazunari Sasaki and Koichi Eguchi",

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AU - Matsukuma, Izumi

AU - Kikuyama, Suzue

AU - Kikuchi, Ryuji

AU - Sasaki, Kazunari

AU - Eguchi, Koichi

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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