High efficiency of toluene adsorption over a novel ZIF-67 membrane coating on paper-like stainless steel fibers
| Autor: | Ying Yan, Huiping Zhang, Kangling Yin |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Inorganic Chemistry chemistry.chemical_compound Adsorption Coating Mass transfer Materials Chemistry Physical and Theoretical Chemistry Microporous material 021001 nanoscience & nanotechnology Condensed Matter Physics Toluene 0104 chemical sciences Electronic Optical and Magnetic Materials Volumetric flow rate Membrane chemistry Chemical engineering Ceramics and Composites engineering 0210 nano-technology BET theory |
| Zdroj: | Journal of Solid State Chemistry. 279:120976 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2019.120976 |
| Popis: | A novel microporous ZIF-67 membrane coating on paper-like stainless steel fibers (ZIF-67 membrane/PSSF) was successfully synthesized by a wet layup papermaking-sintering method followed by the seed-induced growth method. The effects of key factors such as crystallization temperature, synthesis time and Hmim/Co2+ (2-methylimidazole/cobalt chloride) molar ratio on the morphology structure of the samples were studied by the modern characterization techniques including SEM, EDX, TEM, XRD, BET, FTIR and TGA, respectively. The experimental result indicated that the as-synthesized ZIF-67 membrane/PSSF was extremely compact with the average membrane thickness of 4.8 μm. And the sample exhibited high BET surface area (440.9 m2/g), uniform pore size (1.881 nm) and large pore volume (0.2096 cm3/g). The adsorption breakthrough experiment of toluene was performed on different bed reactors filled with ZIF-67 membrane/PSSF and granular ZSM-5 zeolites, respectively. The experiment data was well fitted by Yoon–Nelson model, where the values of rate constant in the fixed bed with ZIF-67 membrane/PSSF increased by 32.2% compared with that of commercial ZSM-5 zeolites at the flow rate of 100 mL/min. And the bed pressure drop and length of unused bed (LUB) were dramatically reduced by 39.6% and 16.8% in 3 cm ZIF-67 membrane/PSSF fixed bed. In conclusion, mass transfer efficiency was significantly enhanced based the structured ZIF-67 membrane/PSSF fixed bed, and this new material is a promising adsorptive material for VOCs removal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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