N-doped activated carbon as support of Pd-Sn bimetallic catalysts for nitrate catalytic reduction
EntityUAM. Departamento de Ingeniería Química
10.1016/j.cattod.2023.01.018Catalysis Today (2023): 1-11
ISSN0920-5861 (print); 1873-4308 (online)
Funded byThe authors greatly appreciate the financial support from the Spanish MICINN (PID 2019-108445RB-100), Comunidad de Madrid (S2018/ EMT-4344). I. Sanchis wishes to thank the Comunidad de Madrid for PEJD-2017-PRE/AMB-4616 contract
SubjectsDenitrification; Hydrothermal carbonization; Lignocellulosic wastes; N-doping; Waste valorization; Química
Rights© 2023 The Author(s)
Esta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
This work studies the catalytic reduction of nitrate using N-doped activated carbon catalysts. Activated carbons were prepared by hydrothermal carbonization (220 °C, 80 % water, 16 h) of garden and park waste and olive stones using (NH4)2SO4 as N source, followed by chemical activation with H3PO4 at 500 °C (N2 atmosphere, 1 h). These were impregnated with Pd and Sn to prepare bimetallic catalysts for nitrate catalytic reduction. N-doping improved the BET surface area up to 1369 m2 g−1 and increased the N content on the catalyst surface to 3 wt%. The N-doped catalysts showed better catalytic performance than the non-doped ones, showing high stability for 100 h on stream, reaching even higher activity than a catalyst supported on a commercial activated carbon. N-doping also showed a positive effect by decreasing NH4+ selectivity. Finally, natural and drinking waters spiked with NO3- were treated in continuous flow, exhibiting the N-doped activated carbon catalysts, prepared from garden and park waste, a high tolerance to ions other than NO3- present in the water solution
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Google Scholar:Sanchis, I. - Rodríguez Ubis, J. Carlos - Mohedano, A. F. - Diaz, E.
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