ADSORPTION SEPARATION OF CO2 AND N2 ON MIL-101 METAL-ORGANIC FRAMEWORK AND ACTIVATED CARBON

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PENGWEI LI.; JIHONG CHEN; FENG WEISHENG; WANG XIANLING

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:2014 | Volume:11 | Issue:3 Page(s): 741-749

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Title

ADSORPTION SEPARATION OF CO2 AND N2 ON MIL-101 METAL-ORGANIC FRAMEWORK AND ACTIVATED CARBON

Author(s)

PENGWEI LI. | JIHONG CHEN | FENG WEISHENG | WANG XIANLING | Issue Writer Certificate

Keywords

MIL-101

ACTIVATED CARBON (AC)

CARBON DIOXID

ADSORPTION ISOTHERMS

ADSORPTION KINETICS

ACTIVATION ENERGY

Abstract

In this work, the CO2 and N2 adsorption properties of MIL-101 metal-organic framework (MOF) and activated carbon (AC) were investigated using a standard gravimetric method within the pressure range of 0–30 bar and at four different temperatures (298, 308, 318 and 328 K). The dual-site Langmuir–Freundlich (DSLF) model was used to describe the CO2 adsorption behaviors on these two adsorbents. The diffusion coefficients and ACTIVATION ENERGY E a for diffusion of CO2 in the MIL-101 and AC samples were estimated separately. Results showed that the isosteric heat of CO2 adsorption on the MIL-101 at zero loading was much higher than that on the AC due to a much stronger interaction between CO2 molecule and the unsaturated metal sites Cr3+on MIL-101. Meanwhile, the dramatically decreased isosteric heats of CO2 adsorption on MIL-101 indicated a more heterogeneous surface of MIL-101. Furthermore, the adsorption kinetic behaviors of CO2 on the two samples can be well described by the micropore diffusion model. With the increase of temperature, the diffusion coefficients of CO2 in the two samples both increased. The ACTIVATION ENERGY E a for diffusion of CO2 in MIL-101 was slightly lower than that in AC, suggesting that MIL-101 was much favorable for the CO2 adsorption. The CO2/N2 selectivities on MIL-101 and AC were separately estimated to be 13.7 and 9.2 using Henry law constant, which were much higher than those on other MOFs.

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APA: Copy

PENGWEI, LI., JIHONG, CHEN, FENG, WEISHENG, & WANG, XIANLING. (2014). ADSORPTION SEPARATION OF CO₂ AND N₂ ON MIL-101 METAL-ORGANIC FRAMEWORK AND ACTIVATED CARBON. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 11(3), 741-749. SID. https://sid.ir/paper/282742/en

Vancouver: Copy

PENGWEI LI., JIHONG CHEN, FENG WEISHENG, WANG XIANLING. ADSORPTION SEPARATION OF CO₂ AND N₂ ON MIL-101 METAL-ORGANIC FRAMEWORK AND ACTIVATED CARBON. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2014;11(3):741-749. Available from: https://sid.ir/paper/282742/en

IEEE: Copy

LI. PENGWEI, CHEN JIHONG, WEISHENG FENG, and XIANLING WANG, “ADSORPTION SEPARATION OF CO₂ AND N₂ ON MIL-101 METAL-ORGANIC FRAMEWORK AND ACTIVATED CARBON,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 11, no. 3, pp. 741–749, 2014, [Online]. Available: https://sid.ir/paper/282742/en

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