窑炉烟气中NO_(2)吸附材料性能研究  

Performance of adsorbents for NO_(2) in furnace flue gas

作　　者：刘伟 崔杏辉 高正霞 陶梦雅 锁东 田世帅 马成良 Liu Wei;Cui Xinghui;Gao Zhengxia;Tao Mengya;Suo Dong;Tian Shishuai;Ma Chengliang(Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450052,Henan,China;不详)

机构地区：[1]郑州大学材料科学与工程学院河南省高温功能材料重点实验室,河南郑州450052 [2]三门峡电熔刚玉有限责任公司,河南三门峡472400

出　　处：《耐火材料》2022年第6期472-476,共5页Refractories

基　　金：国家自然科学基金资助项目(51472220,51872265)。

摘　　要：为实现间歇式窑炉烟气中氮氧化物(NO_(x))通过干法吸附达标排放,以石灰石和石英为原料制备了钙硅质无机吸附剂;以均苯三甲酸(H_(3)BTC)和三水合硝酸铜(Cu(NO_(3))_(2)·3H_(2)O)为原料,采用溶剂热法合成并分别在120、200℃真空中干燥纯化得到1^(#)Cu-BTC和3^(#)Cu-BTC试样,采用水热法合成并在空气中干燥纯化得到2^(#)Cu-BTC试样(金属有机骨架MOFs材料1,3,5-均苯三羧酸铜)。然后对两类材料进行了NO_(2)吸附测试,通过N_(2)物理吸附-脱附、SEM、XRD和热重分析探究了吸附材料的比表面积和孔体积大小、NO_(2)的吸附性能、物相组成、显微结构和热稳定性。结果表明:1)Cu-BTC试样比钙硅质吸附剂吸附容量大,其中溶剂热法合成、在200℃真空中干燥纯化得到的3^(#)Cu-BTC试样比表面积和孔体积最大,对NO_(2)的吸附容量也最大,钙硅质材料的吸附容量较小。2)钙硅质吸附剂的热稳定性优于Cu-BTC试样的,整个过程的质量总损失低于Cu-BTC试样的。2^(#)Cu-BTC试样的热稳定性优于其他两种Cu-BTC试样的,Cu-BTC试样至少在150℃以上金属Cu的活性位点才可以暴露出来。In order to meet the emission standard of nitrogen oxides(NO_(x))in the flue gas of batch furnaces through dry adsorption,calcia silica inorganic adsorbents were prepared with limestone and quartz as raw materials.Sample Cu-BTC 1^(#) was obtained by solvothermal synthesis,drying and purification in vacuum at 120 using trimesic acid(H_(3)BTC)and copper nitrate trihydrate(Cu(NO_(3))_(2)·3H_(2)O)as raw materials;likewise,sample Cu-BTC 3^(#) was obtained at 200℃.Sample Cu-BTC 2^(#) was obtained by hydrothermal synthesis,drying and purification in air(metal organic skeleton MOFs materials,1,3,5-benzenetricarboxylic acid copper).The two types of materials were tested in terms of the NO_(2) adsorption,and then the specific surface area,the pore volume,the NO_(2) adsorption performance,the phase composition,the microstructure,and the thermal stability of adsorbent materials were explored via N_(2) physical adsorption-desorption,SEM,XRD and TG characterization.The results show:(1)the Cu-BTC samples have higher adsorption capacity than the calcia silica adsorbent,in which sample Cu-BTC 3^(#) has the largest specific surface area and pore volume,thus adsorption capacity for NO_(2);(2)the calcia silica adsorbent has better thermal stability and lower total mass loss during the entire process than the Cu-BTC samples;sample Cu-BTC 2^(#) has better thermal stability than the other two Cu-BTC samples,and the metal Cu active sites of the Cu-BTC samples can be exposed at least above 150℃.

关 键 词：氮氧化物(NO_(x)) Cu-BTC 钙硅质无机吸附剂 吸附容量 比表面积 热稳定性 

分 类 号：TQ175.9[化学工程—硅酸盐工业]