Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors
Abstract
BACKGROUND: Oscillatory baffled reactors have good prospect for use in batch to continuous transition for many industries. For reliable design and scale up it is essential to mathematically describe mixing and flow pattern of oscillatory flow. The aim of this study is to investigate the effects of operating conditions on residence time distribution (RTD) of liquid phase in a continuous oscillatory baffled reactor (COBR) and to propose a correlation that accurately describes the flow pattern. RESULTS: Analysis of results obtained for a wide variety of operating conditions in two geometrically similar reactors show that increase of oscillation frequency and amplitude both decrease axial dispersion, with a more prominent effect of amplitude. Proposed power-law correlation is in very good agreement with all performed experiments. Peclet numbers predicted by this correlation are in reasonably good agreement with the literature experimental data and is much better than the ones obtained by t...he commonly used correlation, which contains more fitting parameters. CONCLUSION: Results show that relatively high amplitudes, low frequencies and low to moderate secondary non-oscillatory flow should be used to ensure effective mixing with a low net flow in COBR. Developed correlation offers a simple, yet reliable way to predict the macroscopic flow pattern of liquid in COBR.
Keywords:
Reactor Design / Bioreactors / Process Engineering / Process Intensification / MixingSource:
Journal of Chemical Technology and Biotechnology, 2017, 92, 8, 2178-2188Publisher:
- Wiley, Hoboken
Funding / projects:
- Develooment and utilization of novel and traditional technologies in production of competitive food products with added valued for national and global market - CREATING WEALTH FROM THE WEALTH OF SERBIA (RS-46001)
- Novel encapsulation and enzyme technologies for designing of new biocatalysts and biologically active compounds targeting enhancement of food quality, safety and competitiveness (RS-46010)
- The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
DOI: 10.1002/jctb.5242
ISSN: 0268-2575
WoS: 000423721800037
Scopus: 2-s2.0-85016933558
Institution/Community
Tehnološko-metalurški fakultetTY - JOUR AU - Slavnić, Danijela AU - Živković, Luka AU - Bjelić, Ana V. AU - Bugarski, Branko AU - Nikačević, Nikola PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3624 AB - BACKGROUND: Oscillatory baffled reactors have good prospect for use in batch to continuous transition for many industries. For reliable design and scale up it is essential to mathematically describe mixing and flow pattern of oscillatory flow. The aim of this study is to investigate the effects of operating conditions on residence time distribution (RTD) of liquid phase in a continuous oscillatory baffled reactor (COBR) and to propose a correlation that accurately describes the flow pattern. RESULTS: Analysis of results obtained for a wide variety of operating conditions in two geometrically similar reactors show that increase of oscillation frequency and amplitude both decrease axial dispersion, with a more prominent effect of amplitude. Proposed power-law correlation is in very good agreement with all performed experiments. Peclet numbers predicted by this correlation are in reasonably good agreement with the literature experimental data and is much better than the ones obtained by the commonly used correlation, which contains more fitting parameters. CONCLUSION: Results show that relatively high amplitudes, low frequencies and low to moderate secondary non-oscillatory flow should be used to ensure effective mixing with a low net flow in COBR. Developed correlation offers a simple, yet reliable way to predict the macroscopic flow pattern of liquid in COBR. PB - Wiley, Hoboken T2 - Journal of Chemical Technology and Biotechnology T1 - Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors EP - 2188 IS - 8 SP - 2178 VL - 92 DO - 10.1002/jctb.5242 ER -
@article{ author = "Slavnić, Danijela and Živković, Luka and Bjelić, Ana V. and Bugarski, Branko and Nikačević, Nikola", year = "2017", abstract = "BACKGROUND: Oscillatory baffled reactors have good prospect for use in batch to continuous transition for many industries. For reliable design and scale up it is essential to mathematically describe mixing and flow pattern of oscillatory flow. The aim of this study is to investigate the effects of operating conditions on residence time distribution (RTD) of liquid phase in a continuous oscillatory baffled reactor (COBR) and to propose a correlation that accurately describes the flow pattern. RESULTS: Analysis of results obtained for a wide variety of operating conditions in two geometrically similar reactors show that increase of oscillation frequency and amplitude both decrease axial dispersion, with a more prominent effect of amplitude. Proposed power-law correlation is in very good agreement with all performed experiments. Peclet numbers predicted by this correlation are in reasonably good agreement with the literature experimental data and is much better than the ones obtained by the commonly used correlation, which contains more fitting parameters. CONCLUSION: Results show that relatively high amplitudes, low frequencies and low to moderate secondary non-oscillatory flow should be used to ensure effective mixing with a low net flow in COBR. Developed correlation offers a simple, yet reliable way to predict the macroscopic flow pattern of liquid in COBR.", publisher = "Wiley, Hoboken", journal = "Journal of Chemical Technology and Biotechnology", title = "Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors", pages = "2188-2178", number = "8", volume = "92", doi = "10.1002/jctb.5242" }
Slavnić, D., Živković, L., Bjelić, A. V., Bugarski, B.,& Nikačević, N.. (2017). Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors. in Journal of Chemical Technology and Biotechnology Wiley, Hoboken., 92(8), 2178-2188. https://doi.org/10.1002/jctb.5242
Slavnić D, Živković L, Bjelić AV, Bugarski B, Nikačević N. Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors. in Journal of Chemical Technology and Biotechnology. 2017;92(8):2178-2188. doi:10.1002/jctb.5242 .
Slavnić, Danijela, Živković, Luka, Bjelić, Ana V., Bugarski, Branko, Nikačević, Nikola, "Residence time distribution and Peclet number correlation for continuous oscillatory flow reactors" in Journal of Chemical Technology and Biotechnology, 92, no. 8 (2017):2178-2188, https://doi.org/10.1002/jctb.5242 . .