Performance of ceramic foams as gas–liquid contactors for phenol wet oxidation in the trickle regime
| Autor: | Salvador Ordóñez, Rita R. Zapico, Pablo Marín, Fernando V. Díez |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Packed bed
Pressure drop Chromatography Materials science Continuous reactor 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Volumetric flow rate Industrial wastewater treatment Chemical engineering Mass transfer Wet oxidation 0210 nano-technology Porosity |
| Zdroj: | Catalysis Today. 273:172-177 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2016.01.036 |
| Popis: | The scope of this work was to study the performance of a foam packed bed reactor for homogeneous wet oxidation of phenol, a relevant gas–liquid reaction in industrial wastewater treatment. The use of open-cell foams, macroporous structures constituted by interconnected channels with high bed porosity and surface area, largely enhances interfacial mass transfer rates, without significantly increasing pressure drop. Phenol (45 mol/m3) was oxidized in the aqueous phase by oxygen dissolved from the gas (6 bar), using Cu(II) salt (0.44 mol/m3) as homogeneous catalyst. Experiments were performed in a continuous reactor with partial liquid recycle. The fresh feed and total reactor flow rates have been adjusted to obtain different space times (395–1177 s) and liquid superficial velocities (0.84–3.5 × 10−3 m/s). Temperature has also been varied within the range 110–140 °C. Experimental phenol conversions are compared to that obtained from a simple perfect mixing model. Finally, the performance of the foam has been compared to that of a random packing bed made of spheres. |
| Databáze: | OpenAIRE |
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