DOI: 10.1016/j.jcou.2013.09.002
Scopus记录号: 2-s2.0-84889034942
论文题名: Exploration of high pressure equilibrium separations of nitrogen and carbon dioxide
作者: Hendry D. ; Miller A. ; Wilkinson N. ; Wickramathilaka M. ; Espanani R. ; Jacoby W.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2013
卷: 2017-03-04 起始页码: 37
结束页码: 43
语种: 英语
英文关键词: Concentration gradients
; High pressure separations
; Phase separator
; Supercritical fluids
Scopus关键词: Carbon dioxide
; Effluent treatment
; Mixtures
; Nitrogen
; Phase interfaces
; Supercritical fluid extraction
; Supercritical fluids
; Carbon dioxide concentrations
; Concentration gradients
; High pressure
; Nitrogen concentrations
; Phase separators
; Pressurized gasification
; Separation effectiveness
; Supercritical mixtures
; Separation
; Insectivora
英文摘要: The separation of a supercritical mixture of nitrogen and carbon dioxide is explored at pressures from 10 to 31 MPa and temperatures of -5 C and 23 C. An "ideal interface" like that between water and air at ambient conditions does not form. Rather, a concentration gradient is observed. Nitrogen concentration increases toward the top of the separation vessel while carbon dioxide concentration decreases. In this way, the mole fraction of nitrogen at the top of the mixture is close to one and the concentration of carbon dioxide at the bottom of the mixture also approaches one. This concentration gradient is the basis of an effective separation. As the system pressure increases and/or the system temperature decreases, this density driven concentration gradient becomes less pronounced while consequently, the separation effectiveness is increased. The time to achieve maximum separation is quantified at different conditions, and found to decrease with increasing pressure. At the conditions studied, nitrogen is a supercritical fluid as a pure component while carbon dioxide is a liquid as a pure component, however the mixture is considered supercritical. The observation of a concentration gradient, and thus separation, is due to nonhomogeneities in the supercritical fluid mixture with density driven concentration gradients. This kind of separation has applications in continuous processing of pressurized gasification products. © 2013 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53064
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Hendry D.,Miller A.,Wilkinson N.,et al. Exploration of high pressure equilibrium separations of nitrogen and carbon dioxide[J]. Journal of CO2 Utilization,2013-01-01,2017-03-04