DOI: 10.1016/j.jcou.2018.04.016
Scopus记录号: 2-s2.0-85045891514
论文题名: Standing out the key role of ultramicroporosity to tailor biomass-derived carbons for CO2 capture
作者: Querejeta N. ; Gil M.V. ; Pevida C. ; Centeno T.A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 1
结束页码: 7
语种: 英语
英文关键词: Activated carbon
; Adsorption
; Biomass waste
; CO2 capture
; Ultramicroporosity
Scopus关键词: Activated carbon
; Adsorption
; Atmospheric pressure
; Carbides
; Microporosity
; Biomass wastes
; Carbide derived carbon
; Characteristic energy
; CO2 capture
; Micropore volumes
; Physical activation
; Surface functionalities
; Ultramicroporosity
; Carbon dioxide
英文摘要: The successful tailoring of the ultramicroporosity remarkably increases the CO2 uptake capacity of low cost-carbons derived by a simple one-pot physical activation of olive stones, coffee grounds, almond shells and grape seeds. A porous network dominated by ∼40-46% of ultramicropores below 0.5 nm and no significant presence of pores above 0.7 nm boosts the CO2 uptake at 1 bar and 298 K around 40% compared to materials with similar micropore volume. A slight ultramicropore widening causes the drop to a standard pattern that depends mainly on the micropore volume. The detailed analysis of the CO2 isotherms within the Dubinińs theory provides simple clues for the optimization of carbons for CO2 capture at ambient temperature and atmospheric pressure. Thus, a general pattern of around 7.2 mmol of CO2 captured per cm3 of ultramicropores is found for a variety of activated carbons and carbide derived-carbons with characteristic energy Eo of 29-22 kJ/mol. This feature is typical of materials with average micropore sizes from 0.65 to 1 nm. An enhancement of up to 10 mmol CO2/cm3 is achieved by carbons with Eo ranging between 30 and 32 kJ/mol which correlates with an extremely homogeneous porosity with average dimensions around 0.5 nm. The excellent fit of the present carbons into general patterns exclusively based on the textural features reveals no significant influence of their surface functionalities on the CO2 adsorption performance. © 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/111867
Appears in Collections: 气候减缓与适应
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作者单位: Instituto Nacional Del Carbón (INCAR-CSIC), Francisco Pintado Fe 26, Oviedo, 33011, Spain
Recommended Citation:
Querejeta N.,Gil M.V.,Pevida C.,et al. Standing out the key role of ultramicroporosity to tailor biomass-derived carbons for CO2 capture[J]. Journal of CO2 Utilization,2018-01-01,26