华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (10): 140-146.doi: 10.3969/j.issn.1000-565X.2015.10.020

• 化学化工 • 上一篇    

多孔硅铝酸盐的制备及吸湿性能

魏小兰1 刘侨1 丁静2 王维龙2 陈洪银2 杨建平1   

  1. 1. 华南理工大学 化学与化工学院,广东 广州 510640; 2. 中山大学 工学院,广东 广州 510275
  • 收稿日期:2014-11-07 修回日期:2015-04-27 出版日期:2015-10-25 发布日期:2015-09-06
  • 通信作者: 魏小兰(1963-),女,博士,副教授,主要从事多孔材料制备及功能研究. E-mail:xlwei@scut.edu.cn
  • 作者简介:魏小兰(1963-),女,博士,副教授,主要从事多孔材料制备及功能研究.
  • 基金资助:
     NSFC-广东省人民政府联合基金资助项目(U1034005):国家“973”计划项目(2010CB227103)

Synthesis and Water Vapor Adsorption Property of Hierarchically-Porous Aluminosilicates#br#

Wei Xiao-lan1  Liu Qiao1 Ding Jing2 Wang Wei-longChen Hong-yin2 Yang Jian-ping1   

  1. 1. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,
    China; 2. School of Engineering,Sun Yat-Sen University,Guangzhou 510275,Guangdong,China
  • Received:2014-11-07 Revised:2015-04-27 Online:2015-10-25 Published:2015-09-06
  • Contact: 魏小兰(1963-),女,博士,副教授,主要从事多孔材料制备及功能研究. E-mail:xlwei@scut.edu.cn
  • About author:魏小兰(1963-),女,博士,副教授,主要从事多孔材料制备及功能研究.
  • Supported by:
    Supported by the Joint Fund of the National Natural Science Foundation of China-Guangdong Province
    (U1034005) and the National Program on Key Basic Research Project of China(973 Program)(2010CB227103)

摘要: 为满足高效旋转式除湿技术的要求,采用水热法制备硅铝酸盐吸附剂,揭示了搅拌时间对吸附性能的影响. 通过 N2 吸附 - 脱附等温线和 TEM、XPS、XRD 和 FT-IR 等测试对吸附剂结构与形貌进行表征,利用动态水蒸气吸附分析仪测试吸附剂对水蒸气的吸附 -脱附性能. 结果表明:随着搅拌时间的延长,吸附剂的比表面积、孔容和表面硅铝原子比逐渐增大,而平均孔径逐渐减小,水汽吸附性能有所增强,且吸附剂脱附温度仅为 360 K,在
低湿度(RH≤40%)下的吸附性能强于 3A 分子筛.

关键词: 多级孔硅铝酸盐, 搅拌时间, 水蒸气, 吸附等温线, 脱附性能

Abstract: In order to meet the requirements of the efficient rotary desiccant technology,the aluminosilicate was
synthesized via the hydrothermal method,and the influence of the stirring time on the adsorbent properties was revealed. Then,the structure and morphology of the absorbent were characterized by using the N2 adsorption-desorption isotherm and by means of TEM,XPS,XRD and FT-IR,and the adsorption/desorption properties of the adsorbent on water vapor were determined by using a dynamic vapor sorption system (DVS-STD). Experimental results show that,as the stirring time increases,the specific surface area,pore volume and surface Si/Al ratio of the adsorbent gradually increase,the average pore size gradually decreases,and the absorption property of the adsorbent on water vapor is improved,and that the adsorbent has a low desorption temperature of 360 K,and the absorption property of the aluminosilicate on water vapor is better than that of zeolite 3A at a low relative humidity (RH≤40 %).

Key words: hierarchically-porous aluminosilicate, stirring time, water vapor, adsorption isotherms, desorption property