The CO2 adsorption performance under flue gas for TEPA-impregnated composited oxidized activated carbon

被引：0

作者：

Wang Y. ^{[1
]}

Hu X. ^{[1
]}

Hao J. ^{[1
]}

Guo Q. ^{[1
]}

机构：

[1] State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, Ningxia

来源：

Guo, Qingjie (qingjie_guo@163.com) | 1600年 / Materials China卷 / 71期

关键词：

Activated carbon; Adsorption; Carbon dioxide; Oxidation; Regeneration; TEPA;

D O I：

10.11949/0438-1157.20191178

中图分类号：

学科分类号：

摘要：

Commercial coal-based activated carbon was used as raw material, roasted with low concentration of oxygen, oxidized and modified with H2O2, and impregnated with tetraethylenepentamine (TEPA) to obtain an amine-loaded composite oxidized activated carbon, which was used to simulate flue gas [(15%(vol) CO2+85%(vol) N2) +10%(vol) H2O] adsorption of CO2. After low concentration oxygen modification, activated carbon showed highest specific surface area of 1421. 82 m2/g and highest pore volume of 0.83 cm3/g. The content of oxygen-containing groups on the activated carbon surface and mesoporous volume increased through composited oxidation, resulting higher CO2 adsorption performance on TEPA-impregnated composited oxidized activated carbon. Compared different adsorbents, the sample COAC-4-40TEPA prepared through 4 h oxidation, H2O2 oxidation and 40% TEPA impregnation, showed highest CO2 adsorption capacity of 2.45 mmol/g, which is 2.02 times of AC-40TEPA. Moreover, the CO2 adsorption capacity could maintain 92.24% after ten adsorption cycles. The deactivation model analysis showed that initial adsorption rate of COAC-4-40TEPA was 1.64 times of AC-40TEPA, and the deactivation rate was lower. © All Right Reserved.

引用

页码：2333 / 2343

页数：10

共 37 条

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