Carbon dioxide capture by amine - impregnated mesocellular - foam - containing template / Yan, Wei in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3653–3662 Titre : Carbon dioxide capture by amine - impregnated mesocellular - foam - containing template Type de document : texte imprimé Auteurs : Yan, Wei, Auteur ; Jing Tang, Auteur ; Zijun Bian, Auteur Année de publication : 2012 Article en page(s) : pp. 3653–3662 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Silica mesocellular Dioxide Résumé : By impregnating polyethylenimine (PEI) into silica mesocellular foam with the template remaining (MCF(a)), a novel sorbent with both high CO2 adsorption capacity and high thermal stability was obtained. The remaining P123 template in the MCF played a great role in promoting the CO2 adsorption capacity, which could be 4.5 mmol·g–1 (adsorbent) when the amount of amine loading and the adsorption temperature were optimized as 60% and at 70 °C for the sample MCF(a)/PEI. Meanwhile, MCF(a)/PEI had a high thermal stability and selectivity, after 10 adsorption–desorption cycles, MCF(a)/PEI almost held a constant adsorption capacity; for different compositions of CO2 and N2 mixed gases, it always kept a high adsorption selectivity of CO2/N2. The mechanism of the template synergistic effect was elucidated by the result of a second-order rate law through CO2 adsorption kinetic studies. Moreover, as predicted by the Langmuir adsorption model with n = 2 (two active adsorption sites for one CO2 molecule), the adsorption enthalpy was calculated as about −85 kJ·mol–1, a value which belonged to typical chemical adsorption. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202093h [article] Carbon dioxide capture by amine - impregnated mesocellular - foam - containing template [texte imprimé] / Yan, Wei, Auteur ; Jing Tang, Auteur ; Zijun Bian, Auteur . - 2012 . - pp. 3653–3662. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3653–3662 Mots-clés : Silica mesocellular Dioxide Résumé : By impregnating polyethylenimine (PEI) into silica mesocellular foam with the template remaining (MCF(a)), a novel sorbent with both high CO2 adsorption capacity and high thermal stability was obtained. The remaining P123 template in the MCF played a great role in promoting the CO2 adsorption capacity, which could be 4.5 mmol·g–1 (adsorbent) when the amount of amine loading and the adsorption temperature were optimized as 60% and at 70 °C for the sample MCF(a)/PEI. Meanwhile, MCF(a)/PEI had a high thermal stability and selectivity, after 10 adsorption–desorption cycles, MCF(a)/PEI almost held a constant adsorption capacity; for different compositions of CO2 and N2 mixed gases, it always kept a high adsorption selectivity of CO2/N2. The mechanism of the template synergistic effect was elucidated by the result of a second-order rate law through CO2 adsorption kinetic studies. Moreover, as predicted by the Langmuir adsorption model with n = 2 (two active adsorption sites for one CO2 molecule), the adsorption enthalpy was calculated as about −85 kJ·mol–1, a value which belonged to typical chemical adsorption. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202093h

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