globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.jcou.2017.07.026
Scopus记录号: 2-s2.0-85028027816
论文题名:
Optimizing the properties of granular walnut-shell based KOH activated carbons for carbon dioxide adsorption
作者: Chomiak K.; Gryglewicz S.; Kierzek K.; Machnikowski J.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21
起始页码: 436
结束页码: 443
语种: 英语
英文关键词: Activated carbon ; Biomass ; CO2 capture ; Granular adsorbent ; KOH activation
Scopus关键词: Activated carbon ; Adsorbents ; Adsorption ; Biomass ; Chemical activation ; Gas adsorption ; Granular materials ; Microporosity ; Shells (structures) ; Carbon dioxide adsorption ; CO2 capture ; Granular activated carbons ; Granular adsorbent ; Heat treatment temperature ; Koh activated carbons ; KOH activation ; Walnut shell-based carbons ; Carbon dioxide
英文摘要: A series of microporous granular activated carbons (GACs) has been prepared by KOH activation of walnut shell-based carbons. The characterization of GACs included the determination of microstrength and porous texture parameters (N2 adsorption at 77 K and CO2 adsorption at 273 K). The effect of walnut shell heat-treatment temperature (HTT) on GACs properties and CO2 uptake under pressure varying from sub-atmospheric up to 30 bar has been discussed. The study reveals that walnut shell HTT has to be at least 700 °C to provide a reasonable mechanical strength of GACs on activation at 800 °C and KOH:carbon ratio of 2:1. Elevating HTT from 700 to 900 °C suppresses porosity development (surface area SBET 2000 - 1300 m2 g-1, pore volume VT 0.82 - 0.56 cm3 g-1, micropore width L0 0.89-0.68 nm) while improves mechanical strength of GACs. Walnut shell-based GACs are promising adsorbents for CO2 adsorption/separation operating under different pressure. Suitable adapting HTT allows to prepare adsorbents with sufficient mechanical strength and high CO2 uptake (at 273 K up to 7.2 mmol g-1 under 1 bar and 18.2 mmol g-1 at 30 bar) with relatively low retentivity (15%) when degassed to 0.06 bar. © 2017 Elsevier Ltd. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52681
Appears in Collections:影响、适应和脆弱性

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Recommended Citation:
Chomiak K.,Gryglewicz S.,Kierzek K.,et al. Optimizing the properties of granular walnut-shell based KOH activated carbons for carbon dioxide adsorption[J]. Journal of CO2 Utilization,2017-01-01,21
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