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Issue 12, 2018
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Preparation and characterization of molecularly imprinted solid amine adsorbent for CO2 adsorption

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Abstract

A molecularly imprinted solid amine adsorbent was successfully synthesized via a facile crosslinking reaction based on polyethyleneimine (PEI) as the skeleton, glycol diglycidyl ether (GDGE) as cross-linker and CO2 molecules as template. FT-IR, FT-Raman, 13C NMR spectroscopy and TGA were employed to characterize the chemical structure and thermal stability of the solid amine adsorbent. The experimental results showed that the amine content of the molecularly imprinted polymer polyethyleneimine spheres (MIP-PEIs) could reach as high as 11.41 mmol g−1, and the material exhibited a lower CO2 diffusion resistance during CO2 adsorption. The CO2 adsorption capacity of MIP-PEIs (6.58 mmol g−1) was higher than that of non-imprinted NIP-PEIs (5.87 mmol g−1). The presence of water markedly increased the CO2 adsorption capacity by promoting the chemical adsorption of CO2 on the solid amine adsorbent. The pseudo-second order model could accurately describe the CO2 adsorption process on the MIP-PEIs from the beginning to the end. Moreover, this adsorbent also exhibited good regeneration performance, retaining almost the same adsorption amount of CO2 as the fresh material after ten adsorption–desorption cycles.

Graphical abstract: Preparation and characterization of molecularly imprinted solid amine adsorbent for CO2 adsorption

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Publication details

The article was received on 08 Feb 2018, accepted on 07 May 2018 and first published on 14 May 2018


Article type: Paper
DOI: 10.1039/C8NJ00686E
Citation: New J. Chem., 2018,42, 10016-10023
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    Preparation and characterization of molecularly imprinted solid amine adsorbent for CO2 adsorption

    F. Liu, Y. Kuang, S. Wang, S. Chen and W. Fu, New J. Chem., 2018, 42, 10016
    DOI: 10.1039/C8NJ00686E

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