XU Zehua¹, HE Jiajun¹, DAI Zhentan¹, LI Yongfeng^{1, 2}, DOU Yongshen², LIU Sanmao²

(1. School of Chemical Engineering and Light Industry， Guangdong University of Technology, Guangzhou 510006, China; 2.Foshan Shunde Kinglei Environment & Technology Co., Ltd., Foshan 528308, China)

Abstract: Using manganese oxide as main adsorption material, magnesium carbonate hydroxide as pore-making agent, methyl cellulose as adhesiveand silica sol as structure promoter, Mn-based adsorbents were prepared by extrusion method. After testing the saturated adsorption capacity of volatile organic compounds, and discussing the influence of formula system, mass fraction of basic magnesium carbonate and heat treatment temperature on the adsorption performance of manganese-based adsorbent, the optimal preparation process conditions were determined. The repeated use tests were assessed and the comparison with the commercial activated carbon adsorbents in adsorption performance was also evaluated. The results show that the optimal mass content of magnesium carbonate hydroxide is 43% and the optimal thermal heating temperature is 400 ℃. The obtained optimal Mn-based adsorbent exhibits the saturated adsorption capacity of 0.42 g/g and 0.44 g/g for toluene and formaldehyde respectively, remainingthe toluene adsorption capacity of (0.42±0.01) g/g in the repeated use test. Compared with the activated carbon adsorbent, the obtained Mn-based adsorbent has more large-size mesopores that are suitable for the adsorption of volatile organic compounds. Meanwhile, the Mn-based adsorbent has no obvious heat release and mass loss in the temperature range of 25～800 ℃, indicating better thermal stability and greater product security.

Keywords: manganese oxide;adsorbent; volatile organic compounds

中图分类号： TB332

文献标志码：A

文章编号：1008-5548(2021)04-0036-09

DOI:10.13732/j.issn.1008-5548.2021.04.005

收稿日期： 2020-12-31， 修回日期：2021-03-16，在线出版时间：2021-06-02 16:54。

基金项目：国家自然科学基金项目，编号：51678160；广州市科技计划项目，编号：201704020202；广东省企业科技特派员项目，编号：GDKTP2020022300。

第一作者简介：许泽华(1995—)，女，硕士研究生，研究方向为挥发性有机物净化治理。E-mail： 1084881533@qq.com。

通信作者简介：李永峰(1976—)，男，博士，教授，硕士生导师，研究方向为大气污染控制化学。E-mail： gdliyf@gdut.edu.cn。