硅基介孔材料及其改性对SO_(2)的吸附效能研究  

Adsorption efficiency of silica-based mesoporous materials and their modifications on sulfur dioxide

作　　者：李刚 华绍广[1,2,3] 吴将有 LI Gang;HUA Shao-guang;WU Jiang-you(Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,Anhui Province,China;Huawei National Engineering Research Center of High Efficient Cyclic and Utilization of Metallic Mineral Resources Co.,Ltd.,Maanshan 243000,Anhui Province,China;State Key Laboratory of Safety and Health for Metal Mine,Maanshan 243000,Anhui Province,China)

机构地区：[1]中钢集团马鞍山矿山研究总院股份有限公司,安徽马鞍山243000 [2]华唯金属矿产资源高效循环利用国家工程研究中心有限公司,安徽马鞍山243000 [3]金属矿山安全与健康国家重点实验室,安徽马鞍山243000

出　　处：《化学工程》2020年第12期25-30,36,共7页Chemical Engineering(China)

基　　金：安徽省科技重大专项(18030801105)。

摘　　要：为研究硅基介孔材料及其改性材料对SO_(2)的吸附效能,文中以西曲氯铵和四甲基氢氧化铵为结构导向剂,气相二氧化硅为硅源,硅酸四甲基铵作为功能基团,采用水热反应法制备硅基介孔材料,同时还利用(3-氨基丙基)三乙氧基硅烷对其进行改性。采用扫描电镜、X射线衍射、氮气吸脱附和漫反射傅里叶变换红外光谱表征手段,对合成和改性材料进行了表征;研究了不同条件下硅基介孔材料及其改性对模拟烟气中SO_(2)的吸附效能,并对改性材料吸附性能材料提升的机理进行了解析。研究结果表明:该硅基介孔材料及其改性材料具有均匀表观、比表面积大、丰富表面基团和强热稳定性等特点;在优化条件下,改性后的硅基介孔对烟气中SO_(2)的静活度可达37.38 mg/g。因此,硅基介孔材料及其改性材料对烟气中SO_(2)的处理均具有较大的实践应用潜力。In order to investigate the adsorption efficiency of silica-based mesoporous materials and their modifications on SO_(2)(sulfur dioxide),silica-based mesoporous materials were prepared by hydrothermal reaction.Cetyltrimethylammonium chloride and tetramethylammonium hydroxide were used as structure-oriented agents,fumed silica as silicon source,tetramethylammonium silicate as functional groups,and they were also modified with(3-aminopropyl)triethoxysilane.The synthesized materials and their midifications were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),nitrogen adsorption and desorption and diffused reflection fourier transform infrared spectroscopy(DR FTIR).The adsorption efficiency of silica-based mesoporous materials and their modifications on SO_(2)in simulated flue gas under different conditions was studied.The results show that the silicon-based mesoporous materials and their modification have the characteristics of uniform appearance,large specific surface area,abundant surface groups and strong thermal stability.The static activity of the modified silicon-based mesoporous material to SO_(2)in flue gas could reach 37.38 mg/g under optimized conditions.Therefore,the adsorption of SO_(2)by silica-based mesoporous materials and their modifications have great practical application potential.

关 键 词：硅基介孔材料 烟气 SO_(2) 吸附剂 静活度 

分 类 号：TQ54[化学工程—煤化学工程]