SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (7): 914-919.DOI: 10.1016/j.cjche.2015.12.023

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH3

Seyed Mahdi Mousavi   

  1. Faculty of Chemistry, University of Kashan, Kashan 87317, Iran
  • 收稿日期:2015-07-29 修回日期:2015-10-20 出版日期:2016-07-28 发布日期:2016-08-17
  • 通讯作者: Seyed Mahdi Mousavi

Vanadium oxide nanotubes for selective catalytic reduction of NOx with NH3

Seyed Mahdi Mousavi   

  1. Faculty of Chemistry, University of Kashan, Kashan 87317, Iran
  • Received:2015-07-29 Revised:2015-10-20 Online:2016-07-28 Published:2016-08-17

摘要: Vanadiumoxide (VOx) 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 VOx nanorods (80-120 nm diameter and 1-4 μm length) were synthesized in 25 vol% EtOH/(EtOH+H2O) and the open-ended multiwalled VOx nanotube (50-100 nm inner diameter, 110-180 nm outer diameter and 0.5-2 μm length) synthesized in 50 vol% EtOH/(EtOH+H2O). VOx nanotubes performed the superior NH3-SCR activity under a gas hourly space velocity of 12,000 h-1 at low temperature of 250℃ (NOx 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 VOx 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

Abstract: Vanadiumoxide (VOx) 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 VOx nanorods (80-120 nm diameter and 1-4 μm length) were synthesized in 25 vol% EtOH/(EtOH+H2O) and the open-ended multiwalled VOx nanotube (50-100 nm inner diameter, 110-180 nm outer diameter and 0.5-2 μm length) synthesized in 50 vol% EtOH/(EtOH+H2O). VOx nanotubes performed the superior NH3-SCR activity under a gas hourly space velocity of 12,000 h-1 at low temperature of 250℃ (NOx 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 VOx 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