Continuous N <sub>2</sub> O Capture and Reduction to N <sub>2</sub> Using Ca-Zeolite Adsorbent and Pd/La/Al <sub>2</sub> O <sub>3</sub> Reduction Catalyst
There is an urgent need to develop effective methods for converting nitrous oxide (N2O) into nonharmful N2 because N2O is a potent greenhouse gas, and its increasing concentration in the atmosphere is a major concern for global warming. In this study, we developed a two-step N2O capture and reduction system, employing CaO-incorporated zeolites (Ca-zeolites) as N2O adsorbents and Pd nanoparticles on La-containing Al2O3 (Pd/La/Al2O3) as catalysts for N2O reduction. This process is suitable for continuous operation over a temperature swing of 50–150 °C. The N2O capture capacity and subsequent reduction ability were preserved for at least 15 h (10 cycles). Notably, this system can operate at low temperatures (below 150 °C) using a simple temperature-swing process in the presence of O2.
Authors
- Yuuta Kageyama
- Takashi Toyao (ORCID: https://orcid.org/0000-0002-6062-5622)
- Chenxi He (ORCID: https://orcid.org/0009-0006-5812-7380)
- Shinya Mine (ORCID: https://orcid.org/0000-0002-8339-0301)
- Ningqiang Zhang (ORCID: https://orcid.org/0000-0002-4161-7942)
- Hironori Inomata
- Jiahuan Tong (ORCID: https://orcid.org/0000-0002-8045-8884)
- Wan Li
- Yuan Jing (ORCID: https://orcid.org/0000-0002-6100-8247)
- Ken‐ichi Shimizu (ORCID: https://orcid.org/0000-0003-0501-0294)
- Jialei Zhang (ORCID: https://orcid.org/0009-0007-3507-2628)
Institutions
- Hokkaido University (JP)
- Isuzu Motors (Japan) (JP)
- National Institute of Advanced Industrial Science and Technology (JP)
Publication Details
- Journal
- ACS ES&T Engineering
- Published
- 2024-09-19
- DOI
- https://doi.org/10.1021/acsestengg.4c00560
- Citations
- 6
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 0.70
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science