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Issue 8, 2012
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Selective adsorption of carbon dioxide by carbonized porous aromatic framework (PAF)

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Abstract

A series of carbonized PAF-1s were obtained with enhanced gas storage capacities and isosteric heats of adsorption (Qst for short). Especially, PAF-1-450 can adsorb 4.5 mmol g−1 CO2 at 273 K and 1 bar. Moreover, it also exhibits excellent selectivity over other gases. On the basis of single component isotherm data, the dual-site Langmuir–Freundlich adsorption model-based ideal adsorption solution theory (IAST) prediction indicates that the CO2/N2 adsorption selectivity is as high as 209 at a 15/85 CO2/N2 ratio. Also, the CO2/CH4 adsorption selectivity is in the range of 7.8–9.8 at a 15/85 CO2/CH4 ratio at 0 < p < 40 bar, which is highly desirable for landfill gas separation. The calculated CO2/H2 adsorption selectivity is about 392 at 273 K and 1 bar for 20/80 CO2/H2 mixture. Besides, these carbonized PAF-1s possess excellent physicochemical stability. Practical applications in capture of CO2 lie well within the realm of possibility.

Graphical abstract: Selective adsorption of carbon dioxide by carbonized porous aromatic framework (PAF)

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Publication details

The article was received on 12 Apr 2012, accepted on 09 May 2012 and first published on 09 May 2012


Article type: Paper
DOI: 10.1039/C2EE21935B
Citation: Energy Environ. Sci., 2012,5, 8370-8376
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    Selective adsorption of carbon dioxide by carbonized porous aromatic framework (PAF)

    T. Ben, Y. Li, L. Zhu, D. Zhang, D. Cao, Z. Xiang, X. Yao and S. Qiu, Energy Environ. Sci., 2012, 5, 8370
    DOI: 10.1039/C2EE21935B

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