Study of low-temperature selective catalytic reduction of NO by ammonia over carbon-nanotube-supported vanadium
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摘要: 研究了碳纳米管担载的五氧化二钒(V2O5/CNTs)催化剂上NO低温选择催化还原反应(SCR)。与活性炭载体的催化剂作了对比,结果显示,在负载低含量V2O5时碳纳米管较活性炭显示了更好的催化能力,而且在SO2存在下,催化性能有更大幅度的提高。暂态反应实验显示,V2O5/CNTs 催化剂上NO选择催化还原反应遵循EleyRideal机理,即反应发生于吸附态的NH3和气相或弱吸附的NO之间。
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关键词:
- V2O5/CNTs催化剂 /
- 氮氧化物 /
- 低温
Abstract: In this article, low-temperature selective catalytic reduction (SCR) reaction of NO on carbon nanotube-supported vanadium (V2O5/CNT) catalysts was carried out. When compared with activated carbon as a support catalyst, carbon nanotubes with low load of V2O5 show excellent catalytic activity than that of activated carbon, and the catalytic activity of V2O5/CNT catalysts increases markedly in the presence of SO2. The transient reaction experiment shows that the reaction of VV2O5/CNT catalyst for lowtemperature SCR of NO follows the mechanism of Eley-Rideal, namely by the reaction between the adsorbed NH3 and NO in the gaseous or a weakly adsorbed state.-
Key words:
- V2O5/CNTs catalysts /
- NO /
- low temperature
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