Abstract: Metal Organic Framework MIL-53 was synthesized using aluminium nitrate and terephthalic acid as raw materials via hydrothermal synthesis method and analyzed by XRD and SEM. The adsorption performance of the sample obtained under the optimal preparation conditions was evaluated by adsorption isotherms, liquid phase static equilibrium adsorption and pulse adsorption experiment. The results showed that the material has a regular micro morphology, and the particle sizes are in the range of about 50～80 nm. When the mole ratio of aluminum nitrate and terephthalic acid is 1:1, and the solvent is N, N-dimethylformamide, the MIL-53 has the maximum capacity for methylbenzene adsorption. The adsorption performance of different components is different under the similar temperature and pressure. It is concluded that MIL-53 has preferential adsorption selectivity for o-xylene.

Key words: MOFs, adsorption separation, adsorption equilibrium experiment