Separation of methane/ethylene gas mixtures efficiently by using ZIF-67/water-ethylene glycol slurry
| Autor: | Lanying Yang, Ronald Ssebadduka, Hai Li, Chongzhi Jia, Xiong-Shi Tong, Chang-Yu Sun, Zhi Li, Guang-Jin Chen, Yong Pan, Zhe Zhang, Bei Liu |
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| Rok vydání: | 2016 |
| Předmět: |
Ethylene
General Chemical Engineering Inorganic chemistry General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Mole fraction 01 natural sciences Methane 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Desorption Slurry Physical and Theoretical Chemistry 0210 nano-technology Mass fraction Ethylene glycol |
| Zdroj: | Fluid Phase Equilibria. 414:14-22 |
| ISSN: | 0378-3812 |
| DOI: | 10.1016/j.fluid.2016.01.003 |
| Popis: | By using Zeolitic imidazolate framework-67(ZIF-67)/water-ethylene glycol slurry, we separated methane/ethylene gas mixtures by the absorption-adsorption method. The influences of temperature, mass fraction of ZIF-67 in ZIF-67/water-ethylene glycol slurry, pressure, and gas-slurry ratio on the separation performance were studied systematically. We found lower temperature, mass fraction of ZIF-67 of 0.15, higher gas–liquid ratio, and higher operation pressure are suitable for separation of methane/ethylene mixture. The experimental results show by using the slurry we synthesized, the mole fraction of ethylene in gas phase decreases from 74.8 to 53.0%, the selectivity coefficient reaches 10 (much higher than that of solid ZIF-67), and more than 68% of C2H4 can be recovered after one stage of the absorption-adsorption process. Sorption enthalpy of methane and ethylene at low loading is only 11 and 17 kJ/mol, respectively. In addition, the crystal structure of ZIF-67 remains intact after 20 adsorption/desorption cycles. |
| Databáze: | OpenAIRE |
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