改性活性炭吸附烧结烟气中氮氧化物的研究  

Study on adsorption of nitrogen oxide in sintering flue gas by modified activated carbon

作　　者：蔡建宇[1] 彭兆丰 宋丽云[1] 侯环宇[3] 李坚[1] Cai Jianyu;Peng Zhaofeng;Song Liyun;Hou Huanyu;Li Jian(Key Laboratory of Beijing on Regional Air Pollution Control of Beijing University of Technology,Beijing 100124,China;HBIS Company Limited,Shijiazhuang 050023,Hebei,China;HBIS Steel Technology Research Institute,Shijiazhuang 050023,Hebei,China)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,北京100124 [2]河钢股份有限公司,河北石家庄050023 [3]河钢集团钢铁研究总院,河北石家庄050023

出　　处：《钢铁钒钛》2021年第1期75-82,共8页Iron Steel Vanadium Titanium

基　　金：国家重点研发计划(2017YFC0210302);北京工业大学研究生科技基金(ykj-2017-00101)。

摘　　要：以煤质活性炭为原料,制备了碳酸钾(K_(2)CO_(3))改性活性炭,模拟烧结烟气条件,考察了其在有SO_(2)、CO_(2)和O_(2)条件下的NO_(x)吸附效果。试验表明:0.65 mol/L K_(2)CO_(3)改性活性炭的NO_(x)吸附量最高,120℃时NO_(x)吸附量可达15.17 mg/g,较原样提高了20倍以上;随着吸附温度的升高,NO_(x)饱和吸附量有所下降,稳定在13.70~13.97 mg/g;由于SO_(2)吸附后生成稳定硫酸盐难以脱除,影响了活性炭的加热再生效果。该吸附剂适用于移动床吸附处理烧结烟气。Potash(K_(2)CO_(3)) modified activated carbon was prepared with coal activated carbon as raw material. Under simulated sintering flue gas conditions, the effect of NO_(x) adsorption under the condition with SO_(2), CO_(2) and O_(2) was investigated. Experimental results show that 0.65 mol/L K_(2)CO_(3) modified activated carbon have the highest adsorption quantity of NO_(x). The NO_(x) adsorption capacity can reach 15.17 mg/g and can be improved by more than 20 times. With the increase of adsorption temperature, the desorption quantity of NO_(x) decreases and stabilizes at about 13.70 mg/g to 13.97 mg/g. Since stable sulfate is difficult to remove after SO_(2) adsorption, which decreases the regeneration effect of activated carbon. The adsorbent is suitable for moving bed adsorption treatment of sintering flue gas.

关 键 词：烧结 烟气 氮氧化物 活性炭 吸附 碳酸钾 

分 类 号：TF046[冶金工程—冶金物理化学] X701[环境科学与工程—环境工程]