Enhanced N2O capture and reduction system using Cu/zeolite adsorbent and Pd/La/Al2O3 catalyst under O2-CO2-rich conditions

Chenxi He; Leyang Zhang; Jörg W.A. Fischer; Jialei Zhang; Shinta Miyazaki; Ningqiang Zhang; Junxian Qin; Akihiko Anzai; Ken-ichi Shimizu; Takashi Toyao

doi:10.1016/j.apcatb.2025.125883

Enhanced N2O capture and reduction system using Cu/zeolite adsorbent and Pd/La/Al2O3 catalyst under O2-CO2-rich conditions

Chenxi He
, Leyang Zhang
, Jörg W.A. Fischer
, Jialei Zhang
, Shinta Miyazaki
, Ningqiang Zhang
, Junxian Qin
, Akihiko Anzai
, Ken-ichi Shimizu
, Takashi Toyao

extern

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

Abstract

Nitrous oxide (N₂O) is a potent greenhouse gas associated with increasing environmental risks, particularly due to its global warming potential. The removal of N₂O remains challenging because catalytic decomposition typically requires high temperatures, especially in the presence of co-existing gases such as O₂ and CO₂. In this study, we explored various adsorbents that are efficient for N₂O adsorption in the presence of O₂ and CO₂ and found that a CHA-type zeolite loaded with 10 wt% Cu (Cu(10)/CHA) was particularly effective. We developed a two-step N₂O capture and reduction system using the Cu(10)/CHA adsorbent and Pd nanoparticles loaded on La-doped Al₂O₃ (Pd/La/Al₂O₃) as a catalyst. This system maintained its N₂O adsorption and reduction capability for at least 12 h (9 cycles) while operating continuously over a temperature swing of 50–150 °C.

Original language	English
Article number	125883
Journal	Applied Catalysis B: Environment and Energy
Volume	382
DOIs	https://doi.org/10.1016/j.apcatb.2025.125883
Publication status	Published - Mar 2026
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2025 Elsevier B.V.

Funding

This study was ﬁnancially supported by KAKENHI (Grant No. 21H04626, 23K26690, and 23K20034) from the Japan Society for the Promotion of Science (JSPS) and the Japanese Ministry of Education, Culture, Sports, Science, and Technology (MEXT) within the project “Integrated Research Consortium on Chemical Sciences (IRCCS).” J. W. A. F. gratefully acknowledges the support from the JSPS Postdoctoral Fellowship (PE24052). The authors are greatful to Dr. Hiroshi Hirata, Hokkaido University, for his assistance at the EPR facility. Additional data can be found in the supporting information. This study was ﬁnancially supported by KAKENHI (Grant No. 21H04626 , 23K26690 , and 23K20034 ) from the Japan Society for the Promotion of Science ( JSPS ) and the Japanese Ministry of Education, Culture, Sports, Science, and Technology ( MEXT ) within the project “Integrated Research Consortium on Chemical Sciences ( IRCCS ).” J. W. A. F. gratefully acknowledges the support from the JSPS Postdoctoral Fellowship (PE24052). The authors are greatful to Dr. Hiroshi Hirata, Hokkaido University, for his assistance at the EPR facility.

Funders	Funder number
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology	PE24052

Keywords

Continuous capture and reduction
Cu/zeolite
Greenhouse gas
N O removal

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10.1016/j.apcatb.2025.125883

Cite this

@article{ee8a9716aeaf4875898eebaee3726d75,

title = "Enhanced N2O capture and reduction system using Cu/zeolite adsorbent and Pd/La/Al2O3 catalyst under O2-CO2-rich conditions",

abstract = "Nitrous oxide (N2O) is a potent greenhouse gas associated with increasing environmental risks, particularly due to its global warming potential. The removal of N2O remains challenging because catalytic decomposition typically requires high temperatures, especially in the presence of co-existing gases such as O2 and CO2. In this study, we explored various adsorbents that are efficient for N2O adsorption in the presence of O2 and CO2 and found that a CHA-type zeolite loaded with 10 wt\% Cu (Cu(10)/CHA) was particularly effective. We developed a two-step N2O capture and reduction system using the Cu(10)/CHA adsorbent and Pd nanoparticles loaded on La-doped Al2O3 (Pd/La/Al2O3) as a catalyst. This system maintained its N2O adsorption and reduction capability for at least 12 h (9 cycles) while operating continuously over a temperature swing of 50–150 °C.",

keywords = "Continuous capture and reduction, Cu/zeolite, Greenhouse gas, N O removal",

author = "Chenxi He and Leyang Zhang and Fischer, \{J{\"o}rg W.A.\} and Jialei Zhang and Shinta Miyazaki and Ningqiang Zhang and Junxian Qin and Akihiko Anzai and Ken-ichi Shimizu and Takashi Toyao",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier B.V.",

year = "2026",

month = mar,

doi = "10.1016/j.apcatb.2025.125883",

language = "English",

volume = "382",

journal = "Applied Catalysis B: Environment and Energy",

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T1 - Enhanced N2O capture and reduction system using Cu/zeolite adsorbent and Pd/La/Al2O3 catalyst under O2-CO2-rich conditions

AU - He, Chenxi

AU - Zhang, Leyang

AU - Fischer, Jörg W.A.

AU - Zhang, Jialei

AU - Miyazaki, Shinta

AU - Zhang, Ningqiang

AU - Qin, Junxian

AU - Anzai, Akihiko

AU - Shimizu, Ken-ichi

AU - Toyao, Takashi

PY - 2026/3

Y1 - 2026/3

N2 - Nitrous oxide (N2O) is a potent greenhouse gas associated with increasing environmental risks, particularly due to its global warming potential. The removal of N2O remains challenging because catalytic decomposition typically requires high temperatures, especially in the presence of co-existing gases such as O2 and CO2. In this study, we explored various adsorbents that are efficient for N2O adsorption in the presence of O2 and CO2 and found that a CHA-type zeolite loaded with 10 wt% Cu (Cu(10)/CHA) was particularly effective. We developed a two-step N2O capture and reduction system using the Cu(10)/CHA adsorbent and Pd nanoparticles loaded on La-doped Al2O3 (Pd/La/Al2O3) as a catalyst. This system maintained its N2O adsorption and reduction capability for at least 12 h (9 cycles) while operating continuously over a temperature swing of 50–150 °C.

AB - Nitrous oxide (N2O) is a potent greenhouse gas associated with increasing environmental risks, particularly due to its global warming potential. The removal of N2O remains challenging because catalytic decomposition typically requires high temperatures, especially in the presence of co-existing gases such as O2 and CO2. In this study, we explored various adsorbents that are efficient for N2O adsorption in the presence of O2 and CO2 and found that a CHA-type zeolite loaded with 10 wt% Cu (Cu(10)/CHA) was particularly effective. We developed a two-step N2O capture and reduction system using the Cu(10)/CHA adsorbent and Pd nanoparticles loaded on La-doped Al2O3 (Pd/La/Al2O3) as a catalyst. This system maintained its N2O adsorption and reduction capability for at least 12 h (9 cycles) while operating continuously over a temperature swing of 50–150 °C.

KW - Continuous capture and reduction

KW - Cu/zeolite

KW - Greenhouse gas

KW - N O removal

UR - https://www.scopus.com/pages/publications/105015048338

U2 - 10.1016/j.apcatb.2025.125883

DO - 10.1016/j.apcatb.2025.125883

M3 - Article

VL - 382

JO - Applied Catalysis B: Environment and Energy

JF - Applied Catalysis B: Environment and Energy

M1 - 125883

ER -

Enhanced N2O capture and reduction system using Cu/zeolite adsorbent and Pd/La/Al2O3 catalyst under O2-CO2-rich conditions

Abstract

Bibliographical note

Funding

Keywords

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