文档介绍：中国工程热物理学会传热传质学
学术会议论文编号:123351
Ti掺杂硅胶吸附材料的制备及其水蒸气吸附性能
赵靖华1, 魏小兰1, 丁静2, 蒋赣2,李江2,杨建平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)
(Tel:**********, Email:zhaojinghua88@)
摘要:采用溶胶-凝胶法将金属Ti掺入硅胶制得多孔吸附剂SiO2-TiO2,通过N2吸附-脱附和透射电镜图谱(TEM)对SiO2-TiO2的结构及形貌进行分析,讨论钛掺杂硅胶,钛含量对硅胶结构的影响。用动态水蒸气吸附分析仪研究SiO2-TiO2干燥剂对水蒸气的吸附性能。结果表明随着硅钛比的增加,材料的比表面积略有减少,但变化不大,水蒸气的平衡吸附量降低,且吸附剂在低湿度的水蒸气吸附性能较工业化SBA-15硅胶好。
关键词:介孔SiO2-TiO2;溶胶-凝胶;吸附等温线
Study on Adsorption of Water Vapor of Mesoporous SiO2 –TiO2
Prepared by Sol-Gel Method
ZHAO Jing-Hua1 WEI Xiao-Lan1 DING Jing2 JIANG Gan2 LI Jiang2 YANG Jian-Ping1
School of Chemistry and Chemical Engineering, South China University of Technology,
Guangzhou 510640, China;
2. School of Engineering, Sun Yat-sen University, Guangzhou 510275, China)
Abstract:Mesoporous SiO2-TiO2 was synthesized by means of sol-gel method. The characterization of the SiO2-TiO2were determined by transmission electron microscope (TEM)、 N2 adsorption desorption isotherm and dynamic water vapor sorption analyzer (DVSA). The FHH model is used to study the rough degree of the surface of the adsorbents. The results show that the water vapor adsorption capacity of SiO2-TiO2was higher than SBA-15 silica under relative humidity 30%.
Key words: mesoporous SiO2-TiO2; sol-gel; adsorption isotherms
0前言
空气湿度是评价空气品质优劣的重要环境参数之一,空气湿度控制技术与人们的日常生产和生活密切相关。吸附式干燥除湿技术以其显著的节能优势和品质保持功能已经成为热敏性物料干燥首选技术。作为