期刊
CHEMICAL ENGINEERING JOURNAL
卷 353, 期 -, 页码 584-594出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.07.161
关键词
Hierarchical porous carbons; Microporosity; CO2 capture; CO2/N-2 selectivity; Recyclability
资金
- National Natural Science Foundation of China [21477095, 21677114]
- Natural Science Basic Research Plan in Shaanxi Province of China [2014JQ2-2009]
- Fundamental Research Funds for the Central Universities [xjj2017170]
A series of hierarchical porous carbons (HPCs) with different morphologies and well-developed porosity have been successfully synthesized via a facile and flexible template-free method using hierarchical assembly of polyimide as carbon precursor. Amongst, cornflower-like hierarchical porous carbon (FC4) displays the best CO2 capture property with an adsorption capacity up to 4.05 and 2.87 mmol g(-1) at 273 and 298 K, respectively. The excellent CO2 capture capability of FC4 can be owing to the cooperative effect of moderate meso-/macropore channels and abundant framework micropores, which are conducive to diffusion and capture of CO2 adsorbate. Moreover, FC4 shows superior stability and recyclability and CO2 trapping selectivity with CO2/N-2 initial and final adsorption ratios of 24 and 6.4, respectively. It can be anticipated that the FC4 is a promising adsorbent in the adsorption and separation of carbon dioxide under actual conditions.
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