Citation: XING Jian-Dong, JING Fang-Li, CHU Wei, SUN Hong-Li, YU Lei, ZHANG Huan, LUO Shi-Zhong. Improvement of Adsorptive Separation Performance for C₂H₄/C₂H₆ Mixture by CeO₂ Promoted CuCl/Activated Carbon Adsorbents[J]. Acta Physico-Chimica Sinica, ;2015, 31(11): 2158-2164. doi: 10.3866/PKU.WHXB201510091 shu

Improvement of Adsorptive Separation Performance for C₂H₄/C₂H₆ Mixture by CeO₂ Promoted CuCl/Activated Carbon Adsorbents

XING Jian-Dong ^1,2 ,
JING Fang-Li ^1,2 ,
CHU Wei ^1,2,, ,
SUN Hong-Li ¹ ,
YU Lei ¹ ,
ZHANG Huan ¹ ,
LUO Shi-Zhong ^1,,

1.
1 School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China;
2.
2 Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, P. R. China

Corresponding author: CHU Wei, LUO Shi-Zhong,
Received Date: 10 July 2015
Available Online: 8 October 2015
Fund Project: 国家自然科学基金(21476145)资助项目 (21476145)

CeO₂ promoted CuCl/activated carbon (AC) adsorbents were prepared using an incipient wetness impregnation method, and characterized using N₂ adsorption/desorption isotherms, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). The Cu(II) on the AC surface was reduced to Cu(I) when calcination was performed in a nitrogen flow. The effects of Ce on the C₂H₄/C₂H₆ adsorptive separation performance were investigated. The adsorption isotherms showed that the addition of CeO₂ improved the separation performance by decreasing the C₂H₆ adsorption capacity compared with that of the nonpromoted sample. The XRD and XPS results indicated that the active crystal particles on the AC surface became smaller, leading to higher dispersion and a higher degree of Cu(II) reduction. The best adsorption selectivity was obtained using the 5Ce50Cu [CeO₂ and CuCl2 mass fractions (w) 5% and 50%, respectively] sample, i.e., with CeO₂ in the adsorbent; the adsorption selectivity increased from 4.2 to 8.7 at 660 kPa compared with that of the 50Cu sample.
- C₂H₄,
- Pressure swing adsorption,
- Adsorption selectivity,
- CeO₂ promoter,
- Cu(I) active site,
- Surface characterization
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Improvement of Adsorptive Separation Performance for C₂H₄/C₂H₆ Mixture by CeO₂ Promoted CuCl/Activated Carbon Adsorbents