DOI: 10.1016/j.jcou.2018.07.007
Scopus记录号: 2-s2.0-85050003250
论文题名: Comprehensive study of CO2 capture performance under a wide temperature range using polyethyleneimine-modified adsorbents
作者: Meng Y. ; Jiang J. ; Gao Y. ; Yan F. ; Liu N. ; Aihemaiti A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 89
结束页码: 98
语种: 英语
英文关键词: Adsorption capacity
; Adsorption kinetics
; Cyclic adsorption-desorption stability
; PEI-modified silicas
; Thermal stability
Scopus关键词: Adsorption
; Desorption
; Molecular weight
; Silica
; Stability
; Thermodynamic stability
; Adsorption capacities
; Adsorption desorption
; Adsorption kinetics
; Adsorption performance
; Evaluation indicators
; Modified silica
; Suppression effects
; Wide temperature ranges
; Carbon dioxide
英文摘要: Amine functional adsorbents for CO2 capture have attracted increasing attention as a possible alternative to aqueous amine. Temperature has been proven to be an important parameter that affects the CO2 capture performance, but previous studies often yielded different optimal temperature ranges during texting and lacked multiple evaluation indicators for adsorption performance. In this study, we prepared silica modified with different loadings (10-55%) and molecular weights (600-25000Da) of polyethyleneimine (PEI) to compare the adsorption performance under a wide temperature range (30-120°C), which covered the temperature requirements in most applications of CO2 capture and separation. To evaluate these adsorbents comparatively, CO2 adsorption capacity, CO2 adsorption kinetics, thermal stability and cyclic adsorption-desorption stability were determined. In general, the adsorbents with higher PEI loadings and molecular weights, such as 45-55wt.% loadings or 1200-25000Da molecular weights, were more suitable for CO2 capture at relatively high temperatures, such as 90-120°C. However, the performance of these adsorbents was not as good as several other adsorbents with lower PEI loadings or molecular weights for application at lower temperature, such as in CO2 capture at ambient temperature. In addition, the essential reasons for the influence of temperature were also investigated based on the inherent properties of the adsorbents. The suppression effect and the promotion effect were proposed to explain why the optimum temperature ranges of the adsorbents were so different. © 2018 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/111820
Appears in Collections: 气候减缓与适应
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作者单位: School of Environment, Tsinghua University, Beijing, 100084, China; Key Laboratory of Solid Waste Management and Environment Safety, Ministry of Education, Tsinghua University, Beijing, 100084, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing, 100084, China
Recommended Citation:
Meng Y.,Jiang J.,Gao Y.,et al. Comprehensive study of CO2 capture performance under a wide temperature range using polyethyleneimine-modified adsorbents[J]. Journal of CO2 Utilization,2018-01-01,27