蛋氨酸合钴溶液膜吸收法去除NO
作者:王跃1,朱振中
单位: 江南大学 化学与材料工程学院
关键词: 蛋氨酸合钴;中空纤维膜接触器;膜吸收;一氧化氮
DOI号:
分类号: X701
出版年,卷(期):页码: 2015,35(5):91-96

摘要:
 采用中空纤维膜接触器,蛋氨酸合钴溶液为吸收剂去除烟气中的NO。考察了烟气的气体流速、进气浓度、蛋氨酸合钴溶液的温度、pH值、流量和SO2浓度对NO去除率和传质系数的影响。结果表明,采用膜吸收法,以浓度为0.1%的蛋氨酸合钴溶液作为吸收剂,当NO进气流速0.027 m·s-1,进气浓度626.12 mg·m-3,吸收剂温度50℃,流量4.28×10-6 m3·s-1,pH为8时,传质系数为1.95×10-5 m·s-1,NO去除率最大能达到98 %左右,且在2 h内能保持在80 %以上。进一步研究表明模拟气体中SO2浓度的增加对NO去除率无显著的影响,且SO2吸收率将近100 %。
 
  A new method to remove NO from flue gas with cobalt methionine solution in hollow fiber membrane contactor was developed. The effects of flow velocity and concentration of NO, temperature, pH value and flow velocity of cobalt methionine solution, as well as SO2 concentration on NO removal efficiency and overall mass transfer coefficient were investigated. Experimental results show that NO removal efficiency can be reached 98% and can be maintained as high as 80% for more than 2 h, when inlet NO flow velocity is 0.027 m·s-1 with concentration of  626 mg·m-3 and absorbent pH is 8 with flow velocity of 4.28×10-6 m·s-1 at 50°C.  Meanwhile, the mass transfer coefficient is  about 1.95×10-5 m·s-1 under the same operation conditions. In addition, the coexsited SO2 in flue gas has no obvious influence on NO removal and can be completely removed at the same time.
 

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