The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons
The effect of pore structure on the CO2 adsorption efficiency of polyamine impregnated porous carbons
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DOI：
10.1016/j.micromeso.2015.01.044
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发表时间：
2015-05-15
影响因子：
5.2
通讯作者：
Campbell, Eleanor E. B.
中科院分区：
文献类型：
--
作者：
Gibson, J. A. Arran;Gromov, Andrei V.;Campbell, Eleanor E. B.
系统研究了多胺浸渍对微孔和介孔两种不同多孔碳吸附CO2性能的影响。在多胺浸渍过程中，孔隙填充被证明会导致一部分未填充的微孔体积被气体吸附所阻塞。用热重分析法比较了0.1 bar下的CO2容量与碳载体类型、胺负载量和胺类型的关系。与原料相比，浸渍活性炭的CO2容量增加了12倍。胺浸渍载体的吸附热为90 kJ mol(-1)，表明其为化学吸附机制。介孔材料为胺与CO2的相互作用提供了更有效的支持。低分子量胺与CO2的相互作用比高分子量胺对基本基的利用更有效。(C) 2015爱思唯尔公司版权所有。
The effect of polyamine impregnation on the CO2 adsorption properties of two different porous carbons, one microporous and one mesoporous, was studied systematically. The pore filling during impregnation with polyamines was shown to result in a fraction of the unfilled micropore volume being blocked for gas adsorption. Thermal gravimetric analysis was used to compare the CO2 capacity at 0.1 bar with respect to the carbon support type, the amount of amine loading, and the type of amine. A 12 fold increase in the CO2 capacity was observed when the impregnated activated carbon was compared to the raw starting material. A heat of adsorption for amine impregnated support of 90 kJ mol(-1) was found, clearly indicating a chemisorption mechanism. The mesoporous material provided a more efficient support for the amine to interact with the CO2. The interaction between low molecular weight amines and CO2 showed a more efficient utilization of the basic groups in comparison to high molecular weight species. (C) 2015 Elsevier Inc. All rights reserved.