用于高湿度废气中甲苯吸附净化的疏水型ZSM-5分子筛的合成及其吸附性能研究  

Study on synthesis and adsorption performance of hydrophobic ZSM-5 zeolites for removal of toluene in high-humidity exhaust gas

作　　者：高君安 王伟[1] 张傑[1] 雷志刚[1] 史东军 曲令多 GAO Jun􀆳an;WANG Wei;ZHANG Jie;LEI Zhigang;SHI Dongjun;QU Lingduo(State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing LongTech Environmental Technology Co.,Ltd.,Beijing 100071,China;Zibo Qichuang Chemical Technology Development Co.,Ltd.,Zibo 255000,Shandong,China)

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029 [2]北京泷涛环境科技有限公司,北京100071 [3]淄博齐创化工科技开发有限公司,山东淄博255000

出　　处：《化工学报》2020年第1期337-343,共7页CIESC Journal

基　　金：北京市科技计划项目（Z181100005418011）

摘　　要：采用水热原位法合成了不同硅铝比的ZSM-5分子筛,研究了硅铝比对ZSM-5分子筛结构和疏水性的影响。以典型的挥发性有机物甲苯为对象,在动态吸附实验装置上评价了ZSM-5分子筛吸附有机物的性能,并拟合了甲苯在疏水ZSM-5上的吸附等温线方程。结果表明,高硅铝比ZSM-5具有良好的疏水性,其静态水吸附容量为0.014 g·g-1,在高湿度条件下,甲苯浓度为1800 mg·m-3,GHSV为25000 ml·h-1·g-1,温度为35℃,甲苯穿透吸附容量为0.041 g·g-1,甲苯饱和吸附容量为0.075 g·g-1。吸附等温线的拟合显示,甲苯在疏水ZSM-5分子筛上的吸附符合Langmuir-Freundlich复合模型。ZSM-5 zeolites with different Si/Al ratios were synthesized by hydrothermal in situ method.The effect of Si/Al ratio on the structure and hydrophobicity of ZSM-5 was studied.The adsorption performance of ZSM-5 zeolites for toluene was investigated on a dynamic adsorption experimental device,and the adsorption isotherm equation of toluene on hydrophobic ZSM-5 was studied.The results show that the high-silicon ZSM-5 has good hydrophobicity,and its static water adsorption capacity is 0.014 g·g-1.Under high humidity conditions,the toluene concentration of 1800 mg·m-3,the GHSV of 25000 ml·h-1·g-1 and the temperature of 35℃,the breakthrough adsorption capacity of the synthesized ZSM-5 for toluene is 0.041 g·g-1,and the toluene saturated adsorption capacity is 0.075 g·g-1.The fitting of the adsorption isotherm showed that the adsorption of toluene on the hydrophobic ZSM-5 zeolites was in accordance with the Langmuir-Freundlich model.

关 键 词：疏水 ZSM-5 水热原位法 甲苯 吸附等温线 

分 类 号：X511[环境科学与工程—环境工程]