DOI: 10.1016/j.jcou.2017.11.004
Scopus记录号: 2-s2.0-85034851544
论文题名: Polyamine-Grafted Magadiite: High CO2 Selectivity at Capture from CO2/N2 and CO2/CH4 Mixtures
作者: Vieira R.B. ; Moura P.A.S. ; Vilarrasa-García E. ; Azevedo D.C.S. ; Pastore H.O.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 23 起始页码: 29
结束页码: 41
语种: 英语
英文关键词: Adsorption
; Carbon dioxide
; Organo-magadiite
; Polyethylenimine
; Sips model
Scopus关键词: Adsorbents
; Adsorption
; Gas adsorption
; Grafting (chemical)
; Silanes
; CO2 adsorption
; CO2 selectivity
; Magadiite
; Nitrogen concentrations
; Organic-inorganic
; Polyethylenimines
; Porous polymers
; Post-combustion
; Carbon dioxide
英文摘要: The organic-inorganic adsorbent composed of polyethylenimine (PEI) grafted within organosilane-magadiite layers has been synthesized using different alkoxysilanes with different PEI loadings as a novel adsorbent for CO2 capture from postcombustion and natural gas. The synthesis was confirmed by XRD, 13C and 29Si NMR, TGA and elemental analysis. The increase of nitrogen concentration from PEI was proportional to the chloro- (CP) or glycidyloxypropyl (GM) pending groups’ concentration. However, there was a negative effect in the glycidyloxypropyl-magadiite in high concentration due to the size of this pending group. PEI-xCP-MAG and PEI-xGM-MAG adsorbents were subjected to CO2, N2, CH4, CO2/N2 (15/85 vol %) and CO2/CH4 (30/70 vol %) adsorption up to 20 bar at 75 °C. The experimental isotherms were fit using dual-site Sips (DSS) and Sips model. The parameters obtained from pure gases applied to the extended DSS and Sips model were able to predict the adsorbents selectivity. The selectivity presented expressive values which are comparable to MOF's, zeolites, porous polymers and carbon, even with a low CO2 adsorption. The CO2/N2 and CO2/CH4 selectivities at 1 bar gas mixture were in the range of 111–279 and 10–83, respectively. The studied adsorbents are promising materials in CO2 capture at postcombustion. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111996
Appears in Collections: 气候减缓与适应
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作者单位: Microporous and Mesoporous Molecular Sieves Group, Institute of Chemistry, University of Campinas, University Campus, 270 Monteiro Lobato St., Campinas, SP 13083-862, Brazil; Adsorption by Separation Research Group, Chemical Engineering Department, Federal University of Ceará, Pici Campus, 710 Bdg., 60455-760, Fortaleza, CE 3366 9611, Brazil
Recommended Citation:
Vieira R.B.,Moura P.A.S.,Vilarrasa-García E.,et al. Polyamine-Grafted Magadiite: High CO2 Selectivity at Capture from CO2/N2 and CO2/CH4 Mixtures[J]. Journal of CO2 Utilization,2018-01-01,23