Effect of the Pore Length on CO2 Adsorption over Amine-Modified Mesoporous Silicas

被引：150

作者：

Heydari-Gorji, Aliakbar ^{[1
]}

Yang, Yong ^{[1
]}

Sayari, Abdelhamid ^{[1
]}

机构：

[1] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada

来源：

ENERGY & FUELS | 2011年 / 25卷 / 09期

基金：

加拿大自然科学与工程研究理事会;

关键词：

CARBON-DIOXIDE CAPTURE; SBA-15; SEPARATION; SORBENTS; SIZE; GAS;

D O I：

10.1021/ef200765f

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Carbon dioxide adsorption was investigated in the presence of polyethylenimine (PEI)-impregnated mesoporous silicas with different pore lengths, namely, pore-expanded MCM-41, conventional SBA-15 with different pore diameters (7.2 and 10.5 nm), and SBA-15 with platelet morphology. The pore lengths of the silica supports were ca. 25, 1.5, and 0.2 mu m, respectively. Under comparable conditions, the adsorption performance was found to be strongly dependent upon the pore length. The materials with the shortest channels showed the highest capacity and fastest adsorption. These findings were associated with diminished diffusion resistance and enhanced amine accessibility inside the pores.

引用

页码：4206 / 4210

页数：5

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