Highlighting the relative effects of surface characteristics and porosity on CO2 capture by adsorbents templated from melamine-based polyaminals

被引:32
|
作者
Rehman, Adeela [1 ]
Park, Soo-Jin [1 ]
机构
[1] Inha Univ, Dept Chem, 100 Inharo, Incheon 22212, South Korea
基金
新加坡国家研究基金会;
关键词
Porous polyaminals; Pyrolysis; Nitrogen-rich carbon; CO2; adsorption; CO2/N-2; selectivity; DOPED MICROPOROUS CARBONS; POROUS CARBONS; ACTIVATED CARBONS; HIGH-PERFORMANCE; FACILE SYNTHESIS; PORE-SIZE; ADSORPTION; NITROGEN; DIOXIDE; POLYMERS;
D O I
10.1016/j.jssc.2017.11.019
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Heteroatom doping along with well-tuned porosity are considered as significant characteristics of a porous carbon material for various potential applications. However, it is a challenging task to tune a single parameter while retaining the other variables unaffected, and this is considered a limiting factor in rational and systematic research. In the present work, in situ nitrogen-enriched microporous carbon materials were prepared by direct carbonization of conjugated porous polyaminals at two different temperatures. To evaluate the role of nitrogen doping in gas adsorption, a comparison was made with commercially available high-surface-area (2093 m(2)/g) microporous petroleum-pitch-based activated carbon (AC) deprived of nitrogen functionalities. It was found that the CO2 adsorption capacity of MPA-2-700, carbonized melamine based polyaminal at 700 degrees C, (186.1 mg/g at 273 K/1 bar with a surface area of 403 m(2)/g) was significantly higher than that of AC (111.0 mg/g at 273 K/1 bar). Our results present valuable insight into designing porous adsorbents with optimized surface polarity and textural characteristics as promising candidates for CO2 capture.
引用
收藏
页码:573 / 581
页数:9
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