丙烷在金属铁表面还原NO的实验研究

苏亚欣; 陆哲惺; 周皞; 窦逸峰; 邓文义

丙烷在金属铁表面还原NO的实验研究

东华大学环境科学与工程学院, 上海 201620

基金项目: 国家自然科学基金(51278095)。

详细信息

通讯作者:
苏亚欣(1972-), 男, 博士, 教授, Tel: 021-67792552, E-mail: suyx@dhu.edu.cn。

中图分类号: X511
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- 文章访问数: 485
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- 被引次数: 0
出版历程
- 收稿日期: 2014-07-31
- 修回日期: 2014-09-15
- 刊出日期: 2014-12-30

Experimental study on NO reduction by propane over iron

School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

摘要

摘要: 在程序控温电加热水平陶瓷管反应器、N₂气氛和模拟烟气气氛以及300~1 100 ℃时,对丙烷在金属铁表面还原NO的特性进行了实验研究,并且与相同条件下甲烷在金属铁表面脱硝的效率进行了对比。结果表明,丙烷在金属铁表面能够高效地还原NO。N₂气氛中在500~900 ℃,丙烷在金属铁表面的脱硝效率高于相同含量的甲烷脱硝效率,900 ℃以上丙烷在金属铁表面的脱硝效率超过95%,并且与甲烷的脱硝效率差别很小。模拟烟气条件下,当过量空气系数SR₁小于1.0时,温度超过900 ℃后丙烷在金属铁表面还原NO的效率能够达到90%以上,且有、无燃尽的情况下,NO的还原率相差不大。在相同的条件下,丙烷在金属铁表面的脱硝效率高于相同条件下甲烷的脱硝效率。SO₂对丙烷在金属铁表面还原NO的效率影响很小,可以忽略。
- NO还原 /
- 丙烷 /
- 铁 /
- 甲烷
Abstract: NO reduction by propane over iron was experimentally investigated in a one-dimensional temperature-programmed ceramic tubular reactor at 300~1 100 ℃ in N₂ and simulated flue gas atmospheres. The NO reduction efficiencies by C₃H₈ over iron were compared to that by methane. The results show that propane can effectively reduce NO to N₂ over metallic iron. In N₂ atmosphere, the NO reduction efficiency by propane over metallic iron is higher than that by methane at 500~900 ℃. More than 95% of NO is reduced by propane over metallic iron when the temperature is above 900 ℃, which is very close to that by methane. In simulated flue gas atmosphere, when the excessive air ratio is lower than 1.0, NO reduction by propane over iron exceeds 90% when the temperature is above 900 ℃. There is little difference in NO reduction whether there is a burnout for propane. At same conditions, NO reduction by propane over iron is higher than that by methane. The effect of SO₂ on NO reduction by propane over iron is rather small and can be ignored.
- NO reduction /
- propane /
- iron /
- methane

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