CO2 adsorption by PAMAM dendrimers: Significant effect of impregnation into SBA-15

被引：65
|
作者：
Fadhel, Bandar [1 ]
Hearn, Milton [1 ]
Chaffee, Alan [1 ,2 ]
机构：
[1] Monash Univ, Sch Chem, Australian Res Council, Special Res Ctr Green Chem, Clayton, Vic 3800, Australia
[2] Monash Univ, Sch Chem, CRC Greenhouse Gas Technol, Clayton, Vic 3800, Australia
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 123卷 / 1-3期
关键词：
PAMAM dendrimers; CO2; adsorption; SBA-15; Impregnation; CARBON-DIOXIDE; MESOPOROUS SILICA; SEPARATION; CAPTURE; ADSORBENTS; SURFACE; GAS; GEL;
D O I：
10.1016/j.micromeso.2009.03.040
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Adsorption capacities for dry CO2 were determined for neat polyamidoamine (PAMAM) dendrimers (generation G0.0, 1.0, 2.0 and 3.0), mesoporous SBA-15 and impregnated adsorbents (50% by weight) consisting of SBA-15 as substrate and PAMAM dendrimer (G0.0, 1.0, 2.0 and 3.0) at 20, 75 and 105 degrees C. Neat PAMAM dendrimers adsorbed CO2 very poorly. However, impregnation by these materials into SBA-15 improved their CO2 adsorption capacity significantly, especially at 75 and 105 degrees C. Impregnation seems to break down internal H-bonding and allow the amine groups within the dendrimer to interact with CO2. Elevated temperature improves CO2 diffusion within the impregnated adsorbents, presumably due to improved mobility of the dendrimers, such that cyclic adsorption/desorption behaviour would be realised on a reasonable (10 min) time scale. (c) 2009 CO2CRC Technologies Pty Ltd. Published by Elsevier Inc. All rights reserved
引用
收藏
页码：140 / 149
页数：10
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