Dynamic adsorption of volatile organic compounds on organofunctionalized SBA-15 materials

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境纳米材料实验室

	Dynamic adsorption of volatile organic compounds on organofunctionalized SBA-15 materials
	Hu, Qin ; Li, Jin Jun ; Hao, Zheng Ping ; Li, Lan Dong ; Qiao, Shi Zhang
刊名	CHEMICAL ENGINEERING JOURNAL
	2009-07-01
卷号	149 期号:1 页码:281-288
关键词	Functionalized SBA-15 VOCs Breakthrough curves Mathematical model Bicomponent adsorption
中文摘要	Organofunctionalized SBA-15 materials, including methyl-SBA-15 and phenyl-SBA-15, were synthesized by co-condensation method of tetraethyl orthosilicate (TEOS) and organosilanes such as methyltriethoxysilane (MTES) and phenyltriethoxysilane (PTES) under acidic conditions, and used as adsorbents for the VOCs abatement. These adsorbents were characterized by powder X-ray diffraction, N(2) adsorption/desorption isotherms and FT-IR spectroscopy techniques. The results indicated that all samples showed a highly ordered two dimensional hexagonal mesostructure and the organic groups were chemically incorporated into the pore surface of SBA-15 substrate. The dynamic adsorption behaviors of single VOC component (benzene) on methyl-SBA-15 and phenyl-SBA-15 adsorbents were evaluated via breakthrough curves. It was found that the adsorbent with the PTES/TEOS molar ratio at 1:10 had the largest capacity (0.650mmol/g(adsorbent)) in the single component dynamic adsorption and the phenyl groups had stronger attractive interaction with benzene than the methyl groups. A mathematical model for the organofunctionalized SBA-15 adsorbents was successfully employed to describe the adsorption breakthrough curves of benzene. For binary component adsorption, the phenyl-SBA-15 exhibited the pi-relectrons effect between the adsorbate and the adsorbent, as the phenyl-SBA-15 materials preferred to adsorb benzene to cyclohexane. The larger dynamic VOCs capacity of the organofunctionalized SBA-15 materials was attributed to the synergetic effect between the amount of organic groups and the total pore volume. (C) 2008 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000265422700032
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21621]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Hu, Qin,Li, Jin Jun,Hao, Zheng Ping,et al. Dynamic adsorption of volatile organic compounds on organofunctionalized SBA-15 materials[J]. CHEMICAL ENGINEERING JOURNAL,2009,149(1):281-288.
APA	Hu, Qin,Li, Jin Jun,Hao, Zheng Ping,Li, Lan Dong,&Qiao, Shi Zhang.(2009).Dynamic adsorption of volatile organic compounds on organofunctionalized SBA-15 materials.CHEMICAL ENGINEERING JOURNAL,149(1),281-288.
MLA	Hu, Qin,et al."Dynamic adsorption of volatile organic compounds on organofunctionalized SBA-15 materials".CHEMICAL ENGINEERING JOURNAL 149.1(2009):281-288.