Synthesis of Zeolite A/Activated Carbon Composite and CH4/N2 Adsorption Separation Performance

doi:10.11944/j.issn.1000-0518.2018.04.170102

Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (4): 462-468.DOI: 10.11944/j.issn.1000-0518.2018.04.170102

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Synthesis of Zeolite A/Activated Carbon Composite and CH₄/N₂ Adsorption Separation Performance

Cheng YANG,Jinshan QI,Xingyu CUI,Wenping CHENG,Jinghong MA,Ruifeng LI

College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China

Received:2017-04-05 Accepted:2017-06-30 Published:2018-03-30 Online:2018-04-02
Contact: Wenping CHENG
Supported by:
Supported by the National Natural Science Foundation of China(No.51204120), the Natural Science Foundation for Young Scientists of Shanxi Province, China(2014021014-1), the Key Scientific and Technological Project of Coal Fund of Shanxi Province(No.FT201402-03).

Abstract

Abstract:

A shaped activated carbon(AC) prepared after carbonization and physical activation, starting from pitch and elutrilithe, was further hydrothermally treated with alkaline solution. The effect of crystallization time on the formation of zeolite 4A, the pore structure and the adsorption ability of the composite towards CH₄ and N₂ were investigated by X-ray diffraction(XRD), scanning electron microscopy(SEM), N₂ adsorption-desorption at 77 K and CO₂ adsorption isotherm at 273 K. The results show that silicon and aluminum in this composite are converted to zeolite 4A during the hydrothermal treatment. Simultaneously, micropores between 0.45~0.6 nm are appeared, the micropore volume is increased, accompanied by the presence of a few mesopores and macropores. Adsorption isotherms at 298 K indicate that the adsorption amount of CH₄ by composite AC-2(crystalized for 6 hours) is elevated to 10.8 mL/g with a high CH₄/N₂ equilibrium selectivity of 3.7.

Key words: elutrilithe, methane, nitrogen, adsorption, separation

Cheng YANG, Jinshan QI, Xingyu CUI, Wenping CHENG, Jinghong MA, Ruifeng LI. Synthesis of Zeolite A/Activated Carbon Composite and CH₄/N₂ Adsorption Separation Performance[J]. Chinese Journal of Applied Chemistry, 2018, 35(4): 462-468.

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Synthesis of Zeolite A/Activated Carbon Composite and CH₄/N₂ Adsorption Separation Performance

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