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| Content Provider | Springer Nature Link |
|---|---|
| Author | Feng, Weisheng Chen, Jihong Li, Pengwei Wang, Xianling |
| Copyright Year | 2013 |
| Abstract | In this work, the CO$_{2}$ and N$_{2}$ 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 CO$_{2}$ adsorption behaviors on these two adsorbents. The diffusion coefficients and activation energy E $_{a}$ for diffusion of CO$_{2}$ in the MIL-101 and AC samples were estimated separately. Results showed that the isosteric heat of CO$_{2}$ adsorption on the MIL-101 at zero loading was much higher than that on the AC due to a much stronger interaction between CO$_{2}$ molecule and the unsaturated metal sites Cr$^{3+}$ on MIL-101. Meanwhile, the dramatically decreased isosteric heats of CO$_{2}$ adsorption on MIL-101 indicated a more heterogeneous surface of MIL-101. Furthermore, the adsorption kinetic behaviors of CO$_{2}$ on the two samples can be well described by the micropore diffusion model. With the increase of temperature, the diffusion coefficients of CO$_{2}$ in the two samples both increased. The activation energy E $_{a}$ for diffusion of CO$_{2}$ in MIL-101 was slightly lower than that in AC, suggesting that MIL-101 was much favorable for the CO$_{2}$ adsorption. The CO$_{2}$/N$_{2}$ 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. |
| Starting Page | 741 |
| Ending Page | 749 |
| Page Count | 9 |
| File Format | |
| ISSN | 1735207X |
| Journal | Journal of the Iranian Chemical Society |
| Volume Number | 11 |
| Issue Number | 3 |
| e-ISSN | 17352428 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2013-10-19 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | MIL-101 Analytical Chemistry Physical Chemistry Carbon dioxide Adsorption isotherms Adsorption kinetics Biochemistry Activated carbon (AC) Inorganic Chemistry Activation energy Organic Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |
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