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- W4308453119 endingPage "126561" @default.
- W4308453119 startingPage "126561" @default.
- W4308453119 abstract "• AC-Fe@Cu shows superiority for efficient, rapid, selective Fe(II)EDTA-NO reduction. • Unique AC@Fe@Cu structure and optimal 1:1 atomic ratio are important. • Rapid electron transfer and nascent hydrogen formation are the origin. • Maximization of the roles of Cu as stabilizer and active site also contributes. Fe(II)EDTA complexing absorption is a promising technology for nitric oxide removal; however, inefficient and slow Fe(II)EDTA regeneration from Fe(II)EDTA-NO reduction and undesirable NH 4 + as the major N -containing product are still challenges that should be resolved. This study investigated the performance, kinetics, and product selectivity of Fe(II)EDTA-NO reduction by activated carbon supported bimetallic Fe@Cu composite (AC-Fe@Cu) and unraveled the origin of highly efficient and selective AC-Fe@Cu for Fe(II)EDTA-NO reduction. The reduction efficiency reaches 95.34 % in 30 min, accompanied by 86.78 % N 2 selectivity, outperforming most of the reduction systems reported previously. AC-Fe@Cu is resilient at wide pH (3–8), temperature (20–50 °C), and O 2 concentration ranges (0–10 %) and maintains high efficiency (76.23 %) after three successive cycles (3 h). Simultaneous reduction of Fe(III)EDTA and Fe(II)EDTA-NO indicates that Fe(II)EDTA-NO reduction is the rate-determining step in the Fe(II)EDTA regeneration process. The bimetal configuration and atomic ratio mediate the reduction efficiency, rate, and N 2 selectivity. Unique AC@Fe@Cu structure and optimal atomic ratio of Fe to Cu (1:1) increase the dispersity and provide space proximity and abundant interfaces, which create numerous iron–carbon and iron–copper galvanic cells and promote two-way electron transmission. Fast electron transfer and nascent hydrogen formation contribute to efficient, rapid, and selective Fe(II)EDTA-NO reduction. The maximization of the roles of Cu as stabilizer and active sites for selective N 2 formation also contributes. This study sheds light on reduction system design for Fe(II)EDTA regeneration." @default.
- W4308453119 created "2022-11-12" @default.
- W4308453119 creator A5038014015 @default.
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- W4308453119 creator A5065237943 @default.
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- W4308453119 date "2023-02-01" @default.
- W4308453119 modified "2023-10-18" @default.
- W4308453119 title "The origin of highly efficient and selective activated carbon supported bimetallic Fe@Cu composite for Fe(II)EDTA-NO reduction in Fe(II)EDTA complexation denitrification process" @default.
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- W4308453119 doi "https://doi.org/10.1016/j.fuel.2022.126561" @default.
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