DOI: 10.1016/j.jcou.2017.01.011
Scopus记录号: 2-s2.0-85012054696
论文题名: High pressure supercritical carbon dioxide adsorption in coal: Adsorption model and thermodynamic characteristics
作者: Tang X. ; Ripepi N.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 18 语种: 英语
英文关键词: Adsorption
; Carbon dioxide
; Coal
; Isosteric heat of adsorption
; Langmuir
Scopus关键词: Adsorption
; Adsorption isotherms
; Carbon dioxide
; Coal
; Coal deposits
; Coal storage
; Digital storage
; Gases
; Supercritical fluid extraction
; Temperature
; Temperature distribution
; Dual site langmuir
; Dual-Site Langmuir models
; Isosteric heat of adsorption
; Langmuirs
; Pressure-volume-temperature behaviors
; Supercritical carbon dioxides
; Temperature dependence
; Thermodynamic characteristics
; Gas adsorption
英文摘要: This work uses a dual-site Langmuir adsorption model to describe supercritical carbon dioxide (scCO2) adsorption in coal up to 20MPa and 253K. The isosteric heat of adsorption for scCO2 in coal is calculated analytically by considering both the real gas behavior and the adsorbed phase, which are ignored in the classic Clausius-Clapeyron approximation. It was found that the proposed model can not only reasonably interpret observed test phenomena but also has the intrinsic ability to extrapolate adsorption isotherms under different temperatures beyond test data. The crossovers of the observed adsorption isotherms under different temperatures can be simply attributed to the pressure-volume-temperature (PVT) behavior of the bulk gas during the adsorption process. Both the temperature dependence and adsorption uptake dependence of isosteric heat of adsorption are revealed; the higher the temperature and the adsorption uptake, the lower the isosteric heat of adsorption. The ideal gas law overestimates the isosteric heat of adsorption for scCO2 in coal. The application of the dual-site Langmuir model allows for estimating the CO2 storage capacity of deep unmineable coal seams, modeling CO2 transport behavior via differentiating the true ratio between bulk phase and adsorbed phase, and investigating the true thermodynamic characteristics of CO2 in coal under high pressures. © 2017 Elsevier Ltd. 资助项目: U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52771
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Tang X.,Ripepi N.. High pressure supercritical carbon dioxide adsorption in coal: Adsorption model and thermodynamic characteristics[J]. Journal of CO2 Utilization,2017-01-01,18