Characterization and optimization of an oscillatory baffled reactor (OBR) for ozone-water mass transfer |
| |
| Affiliation: | 1. Bioprocessing Biopharmaceutical Technology Centre, Newcastle University, Newcastle upon Tyne, UK;2. Chemical Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, UK;3. The Centre for Process Innovation, Redcar, UK;1. School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA;2. Alconbury Weston Ltd, Stoke-on-Trent ST4 3PE, United Kingdom;3. Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom;1. University of Toulouse, INPT/UPS, Laboratoire de Génie Chimique, 4 Allée Emile Monso, BP-31243, 31432 Toulouse, France;2. CNRS, Laboratoire de Génie Chimique, 31432 Toulouse, France;3. School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia;1. Biopharmaceutical Bioprocessing Technology Centre, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom;2. Chemical Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom;3. The Centre for Process Innovation (CPI), Wilton Centre, Wilton, Redcar TS10 4RF, United Kingdom;4. Harper Adams University, Newport, Shropshire TF10 8NB, United Kingdom;1. CEB – Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal;2. LEPABE – Laboratory for Process Engineering, Environment, Biotechnology and Energy, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal |
| |
| Abstract: | Ozone-water mass transfer was investigated using an oscillatory baffled reactor (OBR) operated as a semi-batch and as a co-current up flow continuous reactor. The effects of input ozone concentration, input gas and water flow rates, and oscillation conditions on gas hold up, volumetric mass transfer coefficient and mass transfer efficiency were determined. The same reactor was operated as a baffled column (without oscillation) and as a bubble column to assess the effect of the reactor arrangement on the mass transfer. The results show that the OBR was 5 and 3 times more efficient for ozone-water mass transfer than the baffled and bubble columns, respectively. The enhancement obtained with OBR over the baffled column reactor was found to decrease with gas flow rate due to changes in bubble flow pattern from homogenous to heterogeneous. Under continuous flow conditions, the performance of the baffled reactor and the OBR were found to be twice efficient for ozone-water mass transfer than when operating under semi-batch conditions. The mass transfer effeciency (MTE) was found to increase from 57% using the baffled reactor to 92% with OBR under continuous flow at water and gas superficial velocities of 0.3 and 3.4 cm s−1, respectively. |
| |
| Keywords: | Ozone dissolution Mass transfer Oscillatory baffled reactor Continuous flow |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
