ADSORPTION SEPARATION OF CH4/N2 OVER METAL ORGANIC FRAME MATERIAL HKUST-1

›› 2018, Vol. 49 ›› Issue (5): 43-48.

ADSORPTION SEPARATION OF CH4/N2 OVER METAL ORGANIC FRAME MATERIAL HKUST-1

Han Suying,Han Xinhua,Cao Yunxiang,Gao Li,Sun Daofeng,Yan Zifeng

Received:2017-09-05 Revised:2017-10-27 Online:2018-05-12 Published:2018-05-23
Contact: Yan Zifeng E-mail:zifengy99@sina.com

Abstract

Abstract: The HKUST-1 was obtained using trimesic acid self-assembly with Cu2+ and characterized by N2 adsorption，X-ray powder diffraction，TGA and SEM. Adsorption values of CH4 and N2 were measured by gas adsorption instrument. The Clausius-Clapeyron equation was used to calculate the adsorption heat of CH4. The separation coefficient of CH4/N2（SCH4/N2）was calculated by Ideal Adsorbed Solution Theory（IAST）. The results showed that HKUST-1 has a good adsorption effect on CH4. At conditions of 0 ℃，101.325 kPa and 25 ℃，101.325 kPa，the adsorption values of CH4 are 25.1 cm3/g and 15.2 cm3/g，the adsorption values of N2 are 8.0 cm3/g and 3.9 cm3/g，respectively. The selectivity factor for CH4 /N2 is 6.8，and the isosteric heat of adsorption of CH4 is about 20 kJ/mol. Compared with zeolite-like adsorbents，the isosteric heat was smaller，which meant a facile regeneration of adsorbents.

Key words: HKUST-1, separation of CH4/N2, adsorption isotherm, adsorption heat, separation coefficient

Han Suying Han Xinhua Cao Yunxiang Gao Li Sun Daofeng Yan Zifeng. ADSORPTION SEPARATION OF CH4/N2 OVER METAL ORGANIC FRAME MATERIAL HKUST-1[J]. , 2018, 49(5): 43-48.

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