摘要
考察了制备参数及反应条件对蜂窝状堇青石基CuO Al2O3催化剂同时脱硫脱硝活性的影响。结果表明,添加碱金属可以提高脱硫活性,但由于促进NH3氧化而降低了脱硝活性。为了获得理想的同时脱硫脱硝活性,催化剂的适宜载铜量为6.0%,载钠量为2.0%。随着反应温度从350℃升高到450℃,该催化剂的脱硫活性逐渐升高,再生后脱硫活性都有所下降,但仍具有活性随温度升高而升高的趋势,说明脱硫过程为反应控制型;但由于温度升高,NH3氧化加剧,脱硝活性逐渐降低,所以适宜操作温度为400℃。在1450h-1～3600h-1范围内,空速对脱硝活性影响不大,对脱硫活性影响较大。对于再生催化剂,当空速由3600h-1降低到2300h-1时,硫容(SO2转化率达80%时单位质量催化剂所吸附的SO2量)不断增加,继续降低空速时硫容基本保持不变,所以适宜操作空速为2300h-1以下。
Honeycomb cordierite-based CuO/Al_2O_3 catalyst was studied for simultaneous SO_2 and NO removal from flue gas. It is found that the addition of sodium in the catalyst can improve SO_2 removal activity. However, the sodium addition will slightly decrease NO removal activity due to the increased NH_3 oxidation. With increasing the reaction temperature from 350℃ to 450℃, the SO_2 removal activity increases, while the NO removal activity decreases due to the increased NH_3 oxidation. Space velocity shows a slight effect on NO removal in the range of 1450h-1～3600h-1, but a strong effect on SO_2 removal activity. A catalyst composition, 6.0 % copper and 2.0 % sodium, was found to be optimal for simultaneous SO_2 and NO removal. The suitable reaction temperature and space velocity are about 400℃ and 2300h-1 or below, respectively.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2004年第3期257-262,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金重点项目(29633030
20276078)
国家高新技术研究发展计划(863项目
2002AA529110) ~~
