窑炉烟气中NO2吸附材料性能研究

doi:10.3969/j.issn.1001-1935.2022.06.003

耐火材料 ›› 2022, Vol. 56 ›› Issue (6): 472-476.DOI: 10.3969/j.issn.1001-1935.2022.06.003

窑炉烟气中NO₂吸附材料性能研究

刘伟¹⁾, 崔杏辉¹⁾, 高正霞¹⁾, 陶梦雅¹⁾, 锁东²⁾, 田世帅²⁾, 马成良¹⁾

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

收稿日期:2022-02-10 出版日期:2022-12-15 发布日期:2022-12-26
作者简介:刘伟:男,1996年生,硕士研究生。E-mail:lw5489@163.com
基金资助:
国家自然科学基金资助项目(51472220,51872265)。

Performance of adsorbents for NO₂ in furnace flue gas

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

Received:2022-02-10 Online:2022-12-15 Published:2022-12-26

摘要/Abstract

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(H₃BTC)和三水合硝酸铜(Cu(NO₃)₂·3H₂O)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NO₂吸附测试,通过N₂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、NO₂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NO₂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。

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

Abstract: 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 (H₃BTC) and copper nitrate trihydrate (Cu(NO₃)₂·3H₂O) 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 NO₂ adsorption,and then the specific surface area,the pore volume,the NO₂ adsorption performance,the phase composition,the microstructure,and the thermal stability of adsorbent materials were explored via N₂ 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 NO₂;(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 ℃.

Key words: nitrogen oxides (NO_x), Cu-BTC, calcia silica inorganic adsorbent, adsorption capacity, specific surface area, thermal stability

中图分类号:

TQ175.9

刘伟, 崔杏辉, 高正霞, 陶梦雅, 锁东, 田世帅, 马成良. 窑炉烟气中NO₂吸附材料性能研究[J]. 耐火材料, 2022, 56(6): 472-476.

Liu Wei, Cui Xinghui, Gao Zhengxia, Tao Mengya, Suo Dong, Tian Shishuai, Ma Chengliang. Performance of adsorbents for NO₂ in furnace flue gas[J]. Refractories, 2022, 56(6): 472-476.

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窑炉烟气中NO₂吸附材料性能研究

Performance of adsorbents for NO₂ in furnace flue gas

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