DOI: 10.1016/j.jcou.2018.05.018
Scopus记录号: 2-s2.0-85047374678
论文题名: Metal incorporated biochar as a potential adsorbent for high capacity CO2 capture at ambient condition
作者: Lahijani P. ; Mohammadi M. ; Mohamed A.R.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 281
结束页码: 293
语种: 英语
英文关键词: Adsorption kinetics
; CO2 capture
; Cyclic performance
; Metalized biochar
; Selectivity
Scopus关键词: Carbon dioxide
; Catalyst selectivity
; Desorption
; Kinetics
; Metallizing
; Metals
; Physisorption
; Sodium compounds
; Adsorption desorption
; Adsorption kinetics
; Bio chars
; Chemical interactions
; CO2 capture
; Cyclic performance
; Potential adsorbents
; Single-step pyrolysis
; Magnesium compounds
英文摘要: This work investigates the development of metal incorporated biochar as a low-cost and robust adsorbent for high capacity CO2 capture at ambient condition. For this purpose, biochars were prepared through single-step pyrolysis of walnut shell (WS) at different temperatures (500, 700 and 900 °C). The biochar with larger specific surface area and higher microporosity fraction (WS900) was then subjected to metal impregnation followed by N2 heat treatment. The incorporation of basic metal sites into the biochar skeleton enhanced the adsorption of acidic CO2 gas onto the metalized-biochar in the sequence of Mg > Al > Fe > Ni > Ca > raw-biochar > Na. The enhanced CO2 uptake of Mg-loaded biochar (82.0 mg/g) compared to the pristine biochar (72.6 mg/g) at 25 °C and 1 atm, could be explained by the synergistic effects of physical and chemical interactions, yet kinetic studies showed that physisorption was the main governing mechanism controlling the adsorption of CO2 onto the metalized-biochar. Cyclic CO2 capture studies indicated the great stability of Mg-loaded biochar upon several cycles of adsorption-desorption, with no loss in its CO2 capture capacity. It also showed easy regeneration and fast desorption kinetic which makes it a promising inexpensive candidate for real-world CO2 capture systems. Moreover, the adsorbent showed a superior capture performance towards CO2 over N2, O2 and CH4. © 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/111855
Appears in Collections: 气候减缓与适应
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作者单位: Low Carbon Economy (LCE) Research Group, School of Chemical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia; Faculty of Chemical Engineering, Babol Noushirvani University of Technology, Babol, 47148, Iran
Recommended Citation:
Lahijani P.,Mohammadi M.,Mohamed A.R.. Metal incorporated biochar as a potential adsorbent for high capacity CO2 capture at ambient condition[J]. Journal of CO2 Utilization,2018-01-01,26