本文選題：NO還原 + 鐵　； 參考：《應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報(bào)》2016年06期

【摘要】：在N_2氣氛和模擬煙氣氣氛條件下,研究了水蒸氣對(duì)丙烷在金屬鐵表面還原NO的影響.實(shí)驗(yàn)采用電加熱的陶瓷管流動(dòng)反應(yīng)器進(jìn)行,反應(yīng)溫度為300~1 100℃.對(duì)反應(yīng)后的鐵樣品的組分變化和表面微觀結(jié)構(gòu)變化進(jìn)行了XRD和SEM分析.結(jié)果表明,水蒸氣會(huì)使金屬鐵氧化,生成氧化鐵.在N_2氛圍中,600~850℃時(shí)水蒸氣降低了丙烷在金屬鐵表面還原NO的效率.溫度進(jìn)一步升高后,鐵被氧化后表面微觀結(jié)構(gòu)變得疏松多孔,從而使得NO氣體能夠進(jìn)入孔隙內(nèi)部進(jìn)行反應(yīng),此時(shí)水蒸氣對(duì)NO還原效率的削弱作用逐漸消失.在模擬煙氣條件下,水蒸氣有利于提高NO還原效率,特別是在貧燃料條件下.濕煙氣條件下SO_2對(duì)丙烷在金屬鐵表面還原NO的影響很小.在相同條件下丙烷在金屬鐵表面還原NO的效率與甲烷進(jìn)行了比較.結(jié)果表明以丙烷為燃料在金屬鐵表面還原NO,不僅效率相對(duì)較高,而且可以節(jié)省燃料的體積流量.在富燃料條件下,如SR_1=0.9時(shí),在900℃時(shí)水蒸氣體積含量為7.0%條件下,丙烷在金屬鐵表面還原NO的效率比甲烷高14%,而丙烷的用量只有甲烷的1/3.
[Abstract]:The effect of water vapor on the reduction of propane on the surface of metal iron was studied under the conditions of N_2 atmosphere and simulated flue gas. The experiment was carried out by a ceramic tube flow reactor with electric heating. The reaction temperature was 300~1 100 C. The change of the composition of the iron samples and the change of the surface microstructure were analyzed by XRD and SEM. The results showed that the steam was steamed with water. Gas will oxidize metal iron and produce iron oxide. In the atmosphere of N_2, water vapor reduces the efficiency of propane reduction of NO on the metal iron surface at 600~850 C. After the temperature is further elevated, the microstructure becomes porous and porous after the oxidation of iron is oxidized, thus making the NO gas able to enter the pores and react with the NO reduction efficiency at this time. The weakening effect gradually disappeared. Under the simulated flue gas conditions, water vapor could improve the reduction efficiency of NO, especially under the condition of poor fuel. The effect of SO_2 on the reduction of NO on the surface of metal iron under the condition of wet flue gas was very small. The efficiency of propane reduction of NO on the metal iron surface was compared with methane under the same condition. The reduction of NO on the metal iron surface can not only be relatively high in efficiency, but also to save the volume flow of fuel. Under the condition of rich fuel, when the volume content of water vapor is 7% at 900 C, the efficiency of propane reduction of NO on the metal iron surface is 14% higher than that of methane, and the amount of propane is only 1/3. of methane.
【作者單位】： 東華大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51278095)
【分類(lèi)號(hào)】：X701

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