Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH3

doi:10.1016/j.cjche.2015.12.023

Abstract

Abstract: Vanadiumoxide (VO_x) nanostructures, synthesized by hydrothermal treatment using dodecylamine as template, were evaluated for the selective catalytic reduction of NOx with ammonia (NH₃-SCR). The effect of solvent type in the reaction mixture (EtOH/(EtOH+H₂O)) and time of hydrolysis was studied. The obtained materials were characterized by XRD, SEM, TEM and BET. The VO_x nanorods (80-120 nm diameter and 1-4 μm length) were synthesized in 25 vol% EtOH/(EtOH+H₂O) and the open-ended multiwalled VO_x nanotube (50-100 nm inner diameter, 110-180 nm outer diameter and 0.5-2 μm length) synthesized in 50 vol% EtOH/(EtOH+H₂O). VO_x nanotubes performed the superior NH₃-SCR activity under a gas hourly space velocity of 12,000 h^-1 at low temperature of 250℃ (NO_x conversion of 89% & N₂ selectivity of 100%), while most of the developed Vanadia base catalysts are active at high temperature (>350℃). The superior NH₃-SCR activity of VO_x nanotubes at low temperature is related to nanocrystalline structure, special nanotube morphology as well as high specific surface area.

Key words: Hydrothermal, Nanotubes, NOx, Pollution, SCR

摘要： Vanadiumoxide (VO_x) nanostructures, synthesized by hydrothermal treatment using dodecylamine as template, were evaluated for the selective catalytic reduction of NOx with ammonia (NH₃-SCR). The effect of solvent type in the reaction mixture (EtOH/(EtOH+H₂O)) and time of hydrolysis was studied. The obtained materials were characterized by XRD, SEM, TEM and BET. The VO_x nanorods (80-120 nm diameter and 1-4 μm length) were synthesized in 25 vol% EtOH/(EtOH+H₂O) and the open-ended multiwalled VO_x nanotube (50-100 nm inner diameter, 110-180 nm outer diameter and 0.5-2 μm length) synthesized in 50 vol% EtOH/(EtOH+H₂O). VO_x nanotubes performed the superior NH₃-SCR activity under a gas hourly space velocity of 12,000 h^-1 at low temperature of 250℃ (NO_x conversion of 89% & N₂ selectivity of 100%), while most of the developed Vanadia base catalysts are active at high temperature (>350℃). The superior NH₃-SCR activity of VO_x nanotubes at low temperature is related to nanocrystalline structure, special nanotube morphology as well as high specific surface area.

关键词: Hydrothermal, Nanotubes, NOx, Pollution, SCR

Seyed Mahdi Mousavi. Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH₃[J]. , 2016, 24(7): 914-919.

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Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH₃

Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH₃

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