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 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 C3 H8 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 reductoi n 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 di fferecn e in NO er duction 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
