Elimination of NO Pollutant in Semi-enclosed Spaces over Sodium-promoted Cobalt Oxyhydroxide (CoOOH) by Oxidation and Adsorption Mechanism

Journal Article · Tue Dec 15 04:00:00 EST 2020 · Applied Catalysis B: Environmental

DOI:https://doi.org/10.1016/j.apcatb.2020.119404· OSTI ID:1657219

Lin, Bo ^[1]; Wang, Aiyong ^[2]; Ding, Yuanqing ^[1]; Gao, Feng ^[3]; Guo, Yanglong ^[1]; Zhan, Wangcheng ^[1]; Guo, Yun ^[1]; Wang, Li ^[1]

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1. East China University of Science and Technology
2. Chalmers University of Technology
3. BATTELLE (PACIFIC NW LAB)

Low concentrations of NOx accumulated in air in semi-enclosed spaces is a severe health hazard, but its efficient removal at low cost is a grand challenge. A simple method in preparing CoOOH for low-concentration NO removal at room temperature is described here. The samples are synthesized by oxidizing Co(OH)2 to CoOOH with different oxidants (Na2S2O8, O2 and H2O2). Among them, CoOOH prepared by Na2S2O8 (Co-NS) shows remarkable performance for NO abatement, while the samples synthesized by and H2O2 (Co-HO) and O2 (Co-OG) have no apparent NO removal capacity. It is found that the Co-NS material contains a higher concentration of residual Na, which contributes to the decreased crystallinity and increased concentrations of surface active species (Co2+, active oxygen) for NO storage. Following NO storage, the material can be readily regenerated by water washing. The authors from East China University of Science and Technology acknowledge support from National Basic Research Program of China (2013CB933200), National Natural Science Foundation of China (21577035, 21577034), Commission of Science and Technology of Shanghai Municipality (15DZ1205305) and 111 Project (B08021). Aiyong Wang acknowledges the China Scholarship Council for the Joint-Training Scholarship Program with the Pacific Northwest National Laboratory (PNNL). PNNL is operated by Battelle for the US DOE under contract DE-AC05-76RL01830. FG is supported by the U.S. DOE/Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1657219
• Report Number(s): PNNL-SA-149657
• Journal Information: Applied Catalysis B: Environmental, Journal Name: Applied Catalysis B: Environmental Vol. 279
• Country of Publication: United States
• Language: English

Related Subjects

NOx abatement
NOx adsorber
ambient temperature
Na2S2O8
CoOOH