Raman spectroscopic study of CO2 in hydrate cages

doi:10.1016/j.ces.2015.09.001

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	Raman spectroscopic study of CO2 in hydrate cages
	Chen, Litao ; Lu, Hailong ; Ripmeester, John A.
刊名	CHEMICAL ENGINEERING SCIENCE
	2015
关键词	Carbon dioxide Hydrate Raman spectra Fermi resonance CLATHRATE HYDRATE CARBON-DIOXIDE PHASE-EQUILIBRIUM TETRAHYDROFURAN RESONANCE STABILITY CAPTURE WATER
DOI	10.1016/j.ces.2015.09.001
英文摘要	The Raman spectra of CO2 molecules in hydrate cages was studied for structure I CO2 hydrate and structure II tetrahydrofuran (THF)+CO2 binary hydrate. The results obtained for sII hydrate indicated that the Fermi dyad peaks of CO2 in the small cage of THF-CO2 hydrate are located at 1274 cm(-1) and 1380 cm(-1). Numerical fitting of the sI CO2 hydrate Raman spectrum shows CO2 Fermi dyad peaks in the small cage are located at 1275 cm(-1) and 1382 cm(-1). The unperturbed frequencies of the symmetric stretching v(1) and overtone bending v(2) modes were calculated for CO2 in various states. It was found that the v(1) frequency does not follow the loose cage-tight cage model for CO2 in hydrate cages. Explanations are given as to why such a relationship is not expected in terms of the incomplete sampling of the void space of the non-spherical cages by the linear guest molecule and the contribution of H-bonding to the guest-host interactions. (C) 2015 Elsevier Ltd. All rights reserved.; SCI(E); EI; ARTICLE; hlu@pku.edu.cn; John.Ripmeester@nrc-cnrc.gc.ca; 706-711; 138
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/415200]
专题	工学院
推荐引用方式 GB/T 7714	Chen, Litao,Lu, Hailong,Ripmeester, John A.. Raman spectroscopic study of CO2 in hydrate cages[J]. CHEMICAL ENGINEERING SCIENCE,2015.
APA	Chen, Litao,Lu, Hailong,&Ripmeester, John A..(2015).Raman spectroscopic study of CO2 in hydrate cages.CHEMICAL ENGINEERING SCIENCE.
MLA	Chen, Litao,et al."Raman spectroscopic study of CO2 in hydrate cages".CHEMICAL ENGINEERING SCIENCE (2015).