CuAlCl<sub>4</sub> doped MIL-101 as a high capacity CO adsorbent with selectivity over N<sub>2</sub>

doi:10.1007/s11705-014-1438-6

Front. Chem. Sci. Eng.

2014, Vol. 8

Issue (3) : 340-345 https://doi.org/10.1007/s11705-014-1438-6

RESEARCH ARTICLE

CuAlCl₄ doped MIL-101 as a high capacity CO adsorbent with selectivity over N₂

Yixiu WANG¹,Chao LI¹,Fanchao MENG¹,Shuling LV¹,Jintao GUO¹,Xiaoqin LIU¹,Chongqing WANG²,Zhengfei MA^1,^2,^*(

)

1. College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China
2. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

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Abstract

A CuAlCl₄ doped metal organic framework, CuAlCl₄@MIL-101, was prepared by introducing CuAlCl₄ into the pores of MIL-101 for the selective adsorption of CO over N₂. The CuAlCl₄ molecules were evenly distributed into various pores sizes and did not change the intrinsic structure of the MIL-101. Isotherms for CO and N₂ adsorption at 298 K showed that the CO capacity on CuAlCl₄@MIL-101 was much higher than that on virgin MIL-101, whereas the N₂ capacity decreased. The selectivity for CO over N₂ improved from 4.64 to 31.5 at 298 K and 1 bar. The CuAlCl₄@MIL-101 adsorbent displayed outstanding CO adsorption stability and the adsorbent could be regenerated by applying a simple vacuum of 4 mmHg.

Keywords metal organic framework CO adsorbent high stability high selectivity CuAlCl₄

Corresponding Author(s): Zhengfei MA

Online First Date: 25 September 2014 Issue Date: 11 October 2014

Cite this article:

Yixiu WANG,Chao LI,Fanchao MENG, et al. CuAlCl₄ doped MIL-101 as a high capacity CO adsorbent with selectivity over N₂[J]. Front. Chem. Sci. Eng., 2014, 8(3): 340-345.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-014-1438-6
https://academic.hep.com.cn/fcse/EN/Y2014/V8/I3/340

Fig.1 Influence of Cu loading on CO adsorption capacity at 298?K and 1 bar

Fig.2 XRD patterns of MIL-101 and CuAlCl₄@MIL-101

Fig.3 FTIR patterns of MIL-101 and CuAlCl₄@MIL-101

Fig.4 N₂ adsorption isotherms at 77 K of MIL-101 and CuAlCl₄@MIL-101

Fig.5 NLDFT analysis of (a) virgin MIL-101 and (b) CuAlCl₄@MIL-101

Tab.1 The physical parameters of MIL-101 and CuAlCl₄@MIL-101

Fig.6 CO and N₂ adsorption isotherms on virgin MIL-101 and CuAlCl₄@MIL-101 at 298 K

Fig.7 CO adsorption and desorption isotherms of CuAlCl₄@MIL-101 at 298 K

Fig.8 Five CO adsorption regeneration cycles

Fig.9 Adsorption uptake of CO on CuAlCl₄@MIL-101 at 298 K over time

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