Adsorptive Removal of Dichloromethane Vapor on FAU and MFI Zeolites: Si/Al Ratio Effect and Mechanism

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	Adsorptive Removal of Dichloromethane Vapor on FAU and MFI Zeolites: Si/Al Ratio Effect and Mechanism
	Kang, Shunyu; Ma, Jinzhu; Wu, Qinming; Deng, Hua
刊名	JOURNAL OF CHEMICAL AND ENGINEERING DATA
	2018-06-01
卷号	63 期号:6 页码:2211-2218
ISSN号	0021-9568
文献子类	Article
英文摘要	MFI zeolites (ZSM-5) with different Si/Al ratios were synthesized to assess their adsorptive removal of dichloromethane vapor, compared with FAU zeolites (NaX and NaY). All adsorbents were characterized by means of N-2 adsorption, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscopy. The adsorption and desorption performance, water vapor tolerance, and regeneration ability were fully examined. FAU zeolites exhibited better equilibrium capacity than MFI zeolites, while MFI zeolites had superior dynamic capacity. The kinetic uptake of FAU zeolites was significantly depressed by low humidity levels in the mixture. Regardless of the type of zeolite, high Si content was not only beneficial to equilibrium adsorption but also helpful for water vapor resistance. ZSM-5 (200) (SiO2/Al2O3 = 200) with the highest Si/Al ratio was the best candidate in this study for removal of dichloromethane. In addition, it could be reused without a significant decrease in uptake after several regeneration cycles. With the aid of in situ diffuse reflectance Fourier transform infrared spectroscopy and density functional theory simulation, adsorbed dichloromethane was found to be in intimate contact with the pore window of FAU zeolites but was surrounded by the pore walls of MFI zeolites. Experimental and theoretical results were consistent with each other and indicated that MFI zeolites show better adsorptive selectivity of dichloromethane (DCM) over water than FAU.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40797]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Kang, Shunyu,Ma, Jinzhu,Wu, Qinming,et al. Adsorptive Removal of Dichloromethane Vapor on FAU and MFI Zeolites: Si/Al Ratio Effect and Mechanism[J]. JOURNAL OF CHEMICAL AND ENGINEERING DATA,2018,63(6):2211-2218.
APA	Kang, Shunyu,Ma, Jinzhu,Wu, Qinming,&Deng, Hua.(2018).Adsorptive Removal of Dichloromethane Vapor on FAU and MFI Zeolites: Si/Al Ratio Effect and Mechanism.JOURNAL OF CHEMICAL AND ENGINEERING DATA,63(6),2211-2218.
MLA	Kang, Shunyu,et al."Adsorptive Removal of Dichloromethane Vapor on FAU and MFI Zeolites: Si/Al Ratio Effect and Mechanism".JOURNAL OF CHEMICAL AND ENGINEERING DATA 63.6(2018):2211-2218.