Preparation and CO<sub>2</sub> adsorption performance of a novel hierarchical micro/mesoporous solid amine sorbent

KONG Tong-tong; WANG Xia; GUO Qing-jie

Volume 43 Issue 12

Dec. 2015

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Article Navigation > Journal of Fuel Chemistry and Technology > 2015 > 43(12): 1489-1497

KONG Tong-tong, WANG Xia, GUO Qing-jie. Preparation and CO2 adsorption performance of a novel hierarchical micro/mesoporous solid amine sorbent[J]. Journal of Fuel Chemistry and Technology, 2015, 43(12): 1489-1497.

Citation:

KONG Tong-tong, WANG Xia, GUO Qing-jie. Preparation and CO₂ adsorption performance of a novel hierarchical micro/mesoporous solid amine sorbent[J]. Journal of Fuel Chemistry and Technology, 2015, 43(12): 1489-1497.

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Preparation and CO₂ adsorption performance of a novel hierarchical micro/mesoporous solid amine sorbent

Key Laboratory of Clean Chemical Processing of Shandong Province, Qingdao University of Science & Technology, Qingdao 266042, China

Funds: The project was supported by the National Natural Science Foundation of China (21276129) and Qingdao Application Foundation Research Project (14-2-4-5-jch).

Received Date: 2015-07-07
Rev Recd Date: 2015-09-15
Publish Date: 2015-12-30

Abstract

Abstract

The mixed supports were obtained at different weight ratios of HZSM-5 to MCM-41 by physical mixing processes. Tetraethylenepentamine (TEPA) modified mixed supports sorbents were prepared by the impregnation method. The sorbents were characterized by nitrogen adsorption/desorption, Fourier transform infrared spectroscopy (FT-IR) and thermogravimetric analysis (TGA) techniques. The effects of mixing ratios of HZSM-5 to MCM-41, TEPA loadings, adsorption temperatures, influent velocities, and CO₂ partial pressures on CO₂ adsorption capacity were investigated in a fixed bed reactor. It showed that the maximum CO₂ adsorption capacity was 3.57 mmol/g of HZSM-5/MCM-41-30%TEPA at the adsorption temperature of 55℃ and influent velocity of 30 mL/min. After ten-cycles, the CO₂ adsorption capacity decreased by 8.1%. CO₂ adsorption was determined by a two-stage process, a fast breakthrough adsorption and a gradual approaching equilibrium stage. Moreover, the breakthrough adsorption capacity accounted for approximately 80% of the equilibrium adsorption capacity. The Avrami model could fit well with the experimental data of HZSM-5/MCM-41-30%TEPA. It illustrated that the adsorption mechanism was dominated by both chemical and physical adsorption.
- micro/mesoporous composites,
- tetraethylenepentamine,
- CO₂ adsorption,
- regenerability,
- adsorption kinetics

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References(23)

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