CIESC Journal ›› 2020, Vol. 71 ›› Issue (1): 337-343.DOI: 10.11949/0438-1157.20191253

• Separation engineering • Previous Articles     Next Articles

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

Jun an GAO1(),Wei WANG1,Jie ZHANG1(),Zhigang LEI1,Dongjun SHI2,Lingduo QU3   

  1. 1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    2. Beijing LongTech Environmental Technology Co. , Ltd. , Beijing 100071, China
    3. Zibo Qichuang Chemical Technology Development Co. , Ltd. , Zibo 255000, Shandong, China
  • Received:2019-10-23 Revised:2019-10-30 Online:2020-01-05 Published:2020-01-05
  • Contact: Jie ZHANG

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

高君安1(),王伟1,张傑1(),雷志刚1,史东军2,曲令多3   

  1. 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
  • 通讯作者: 张傑
  • 作者简介:高君安(1995—),男,硕士研究生,gaojunan321@163.com
  • 基金资助:
    北京市科技计划项目(Z181100005418011)

Abstract:

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.

Key words: hydrophobic, ZSM-5, hydrothermal in situ, toluene, adsorption isotherm

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。

关键词: 疏水, ZSM-5, 水热原位法, 甲苯, 吸附等温线

CLC Number: