锰基吸附剂的制备及其吸附性能  

Preparation of Mn-based adsorbents and its adsorption performance

作　　者：许泽华 何家俊 戴镇坛 李永峰[1,2] 窦永深 刘三毛 XU Zehua;HE Jiajun;DAI Zhentan;LI Yongfeng;DOU Yongshen;LIU Sanmao(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China;Foshan Shunde Kinglei Environment&Technology Co.,Ltd.,Foshan 528308,China)

机构地区：[1]广东工业大学轻工化工学院,广东广州510006 [2]佛山市顺德区金磊环保科技有限公司,广东佛山528308

出　　处：《中国粉体技术》2021年第4期36-44,共9页China Powder Science and Technology

基　　金：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。

摘　　要：以锰氧化物为主吸附材料,碱式碳酸镁为造孔剂,甲基纤维素为胶黏剂,硅溶胶为结构助剂,采用挤条法制备锰基吸附剂;对挥发性有机物饱和吸附容量进行测试,探讨配方体系、碱式碳酸镁的质量分数、热处理温度对锰基吸附剂吸附性能的影响,确定最优制备工艺条件,并进行了多次再生和重复使用效果测评,最后与商用活性炭等吸附剂进行了吸附性能的比较分析。结果表明:造孔剂碱式碳酸镁的最佳质量分数为43%,最优热处理温度为400℃;最优制备工艺条件下制备的锰基吸附剂产品对甲苯和甲醛的饱和吸附容量分别达到0.42、0.44 g/g;经多次再生和重复使用的甲苯吸附容量能维持在(0.42±0.01)g/g;与活性炭相比,自制锰基吸附剂具有更多大粒径尺寸的介孔结构,吸附能力更强;在25~800℃温度范围内无明显放热和失质量现象,表现出良好耐热稳定性,使用过程中的安全性更好。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.

关 键 词：锰氧化物 吸附剂 挥发性有机物 

分 类 号：TB332[一般工业技术—材料科学与工程]