New crosslinked-porous poly-ammonium microparticles as CO2 adsorbents |
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Authors: | Guangren Yu Ziwei Man Qingzeng Li Na Li Xinying Wu Charles Asumana Xiaochun Chen |
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Affiliation: | Beijing Key Laboratory of Membrane Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China |
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Abstract: | A new porous polymeric microparticle, poly4-vinylbenzyltriethylammonium chloride] (PVBTEA]Cl]), is prepared from the crosslinking polymerization of 4-vinylbenzyltriethylammonium chloride with N,N-methylenebisacrylamide via inverse suspension polymerization using cyclohexane as continuous phase, Span 80-Tween 80 as dispersant, and PEG600 as porogen. Two other microparticles, PVBTEA]BF4] and PVBTEA]PF6] are further obtained through ion-exchange. FT-IR, TGA, SEM, and EDS analyzes indicate that these microparticles have good porosity (apparent porosities are 55.0%, 69.7% and 64.3%, respectively), high thermal stability, and large specific surface area, which make them potentially applicable as adsorbent agents. Their CO2 adsorption–desorption performance is investigated. It is observed that such porous polymeric microparticles present high CO2 sorption capability; typically, the CO2 sorption of PVBTEA]PF6] is 1.38 wt% at 25 °C and 1 bar. Such porous polymeric microparticles are good candidates for CO2 adsorption. |
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Keywords: | Polymeric ionic liquids Porous Microparticles Inverse suspension polymerization |
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