摘要
以城市污水厂剩余污泥为原料,采用负载金属氧化物的方法进行改性制备烟气脱硫吸附剂,并进行了性质表征,对污泥吸附剂在SO2-O2-H2O(g)-N2体系的吸附机理进行了探讨。结果表明:负载质量分数为5%MgO的吸附剂性能较好;在SO2入口浓度为2 021.38mg/m3、O2质量分数为12%、H2O(g)质量分数为12%、气体流速为2.13m/min和温度60℃的条件下,污泥吸附剂的脱硫效率为93.8%,吸附容量为66.6mg/g;水蒸气存在时,碱金属氧化物MgO较强的碱性作用促进了对SO2的化学吸附;等温吸附过程可用Freundlich模型描述。
Via loading metal oxide,the adsorbent for flue gas desulfurization was produced with sludge from urban sewage plant,and its property and adsorption mechanism in SO2-O2-H2O（g）-N2 system were studied.The results show that adsorbent with 5% MgO loading mass fraction works better;while SO2 inlet concentration stays at 2 021.38mg/m3,O2 mass fraction at 12% and H2O（g） at 12%,flue gas velocity at 2.13m/min and the temperature at 60℃,the sludge-derived adsorbent desulfurization efficiency and adsorption capacity can reach 93.8% and 66.6mg/g respectively.In water-vapor,the basic metal oxide（MgO） strong basicity can accelerate chemical adsorption for SO2.The isothermal adsorption process can be described with Freundlich model.
出处
《化工机械》
CAS
2011年第6期700-703,724,共5页
Chemical Engineering & Machinery
基金
黑龙江省科技计划项目(No.GZ08A403)
关键词
污泥
吸附剂
烟气脱硫
sludge
adsorbent
flue gas desulfurization
