Changes of activated coke properties in cyclic adsorption treatment of flue gases
Changes of activated coke properties in cyclic adsorption treatment of flue gases
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DOI：
10.1016/j.fuproc.2012.06.011
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发表时间：
2012-12
影响因子：
7.5
通讯作者：
K. Jastrząb
中科院分区：
文献类型：
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作者：
K. Jastrząb
分析了两种用于高炉烟气净化的波兰活性焦(工业AKP-5和实验室用SWS-6)的物化性能、吸附性能和催化性能的变化。在随后的S-R吸收-热再生循环过程中，活性焦比表面积线性增加：AKP从218m2/g增加到482 m2/g，SWS从150 m2/g增加到250m2/g。同时，在保持大孔体积不变的情况下，观察到微孔体积逐渐增加。伴随着这些变化的是点火温度的不利下降、机械强度和堆积密度的降低。二氧化硫和汞的吸附活性是比表面积的线性函数。在15个S-R循环中，初始动态吸附容量79gSO2/kg碱性磷酸酶提高了67%。对汞蒸气的动态吸附容量由0.25 mg/kg提高到0.9 mg/kg。氨还原氮氧化物的程度不取决于S-R循环的次数。消除了灰分含量和表面官能团的存在对反硝化度的影响。
Changes of physico-chemical, sorptive and catalytic properties of two Polish activated cokes (industrial AKP-5 and laboratory SWS-6) used in flue gas cleaning with BF method were analyzed. The subsequent cycles of the process: SO2sorption–thermal regeneration (S-R) resulted in the linear increase of the specific surface area of activated coke: from 218 to 482m2/g for AKP and from 150 to 250m2/g for SWS were presented. At the same time a gradual increase of a micropore volume at an unchanged volume of macropores was observed. An unfavorable drop of the ignition temperature, lowered mechanical strength and bulk density accompanied these changes. SO2and Hg adsorptive activity is a linear function of the specific surface area. The initially dynamic sorption capacity 79g SO2/kg of AKP increased by 67% in 15 S–R cycles. The dynamic adsorption capacity of Hg vapors increased from 0.25 to 0.9mg Hg/kg of AKP. The degree of nitrogen oxide reduction using ammonia did not depend on the number of S–R cycles. The impact of ash content and the presence of some functional groups on the surface on denitrification degree were eliminated.