Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 50, Issue 4, Pages 2254-2261Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie101414n
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Funding
- National Natural Science Foundation of China [21006031, 20936001]
- Science and Technology Foundation of the city of Guangzhou
- State Key Lab of Subtropical Building Science
- South China University of Technology [2010ZC19]
- Fundamental Research Funds for the Central Universities
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Adsorption equilibrium and diffusion of benzene on mesoporous chromium-terphthalate-based crystals (MIL-101) were experimentally studied by the gravimetric method in the pressure range up to 60.0 mbar. The MIL-101 crystals, whose sizes are about 100 rim, were synthesized by using microwave irradiation method. Adsorption isotherms and kinetic curves of benzene on the MIL-101 were measured experimentally. Results show that the Maximum amount adsorbed of benzene on the synthesized MIL-101 was up to 16.5 mmol/g (or 176 wt %) at 288 K and 56.0 mbar. Diffusion coefficients of benzene within the MIL-101 were in the range of (4.25-4.76) x 10(-9) cm(2)/s in 288-318 K with a lower activation energy of 2.41 kJ/mol. Temperature programmed desorption (TPD) curves exhibited two separated peaks corresponding to two types of major adsorption sites for benzene adsorption on MIL-101. Consecutive cycles of adsorption-desorption experiment showed a fast desorption kinetics and high reversibility for benzene adsorption on MIL-101. The efficiency of benzene desorption from MIL-101 can reach 97%.
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