Evaluation of a gas-liquid stirred reactor emulator via network models
Backmixed stirred reactor has always been the first choice equipment for carrying out gas-liquid reactions. However, they may not be the best, mainly because of the non-uniform gas distribution in the vessel. Moreover, the gas liquid flow behaviour is not clearly understood partly due to the complex...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
1989
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| Online Access: | http://eprints.utm.my/4816/1/NoorAishahSaidinaAmin1989_EvaluationOfAGasLiquid.pdf |
| _version_ | 1825909623584980992 |
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| author | Saidina Amin, Nor Aishah Mann, R |
| author_facet | Saidina Amin, Nor Aishah Mann, R |
| author_sort | Saidina Amin, Nor Aishah |
| collection | ePrints |
| description | Backmixed stirred reactor has always been the first choice equipment for carrying out gas-liquid reactions. However, they may not be the best, mainly because of the non-uniform gas distribution in the vessel. Moreover, the gas liquid flow behaviour is not clearly understood partly due to the complex interactions between gas and liquid. Due to these reasons, a model which can first predict the internal behaviour of two-phase flow accurately is needed. A2-D experimental rig has been used to study the liquid flow behaviour. From photographic evaluations, valuable insight of the gas-liquid flow in the vessel is obtained. Two models have been tested to evaluate the experimental results. The models are able to predict the local gas hold-up, which is an important variable to predict gas-liquid flow pattern. The first model is the simple zones-in-loops based on the gas and liquid flowing in loops through a series of eight backmixed zones in the half 2-D stirred vessel. The second model is a more complex equal sized square cells network which accommodates a more realistic liquid flow pattern and thus, a more successful prediction of the two-phase flow behaviour. The predicted local gas hold-ups are exhibited on a unique 3-D spatial map. They display very encouraging predictive values in comparison with the experimental results. With improvements in the bubble detection techniques and also by assuming non-uniform bubble size the model has a potential to predict accurately not only the hydrodynamics characteristics, but also the physico-chemical interactions. |
| first_indexed | 2024-03-05T18:04:56Z |
| format | Article |
| id | utm.eprints-4816 |
| institution | Universiti Teknologi Malaysia - ePrints |
| language | English |
| last_indexed | 2024-03-05T18:04:56Z |
| publishDate | 1989 |
| record_format | dspace |
| spelling | utm.eprints-48162010-06-01T03:20:59Z http://eprints.utm.my/4816/ Evaluation of a gas-liquid stirred reactor emulator via network models Saidina Amin, Nor Aishah Mann, R T Technology (General) Backmixed stirred reactor has always been the first choice equipment for carrying out gas-liquid reactions. However, they may not be the best, mainly because of the non-uniform gas distribution in the vessel. Moreover, the gas liquid flow behaviour is not clearly understood partly due to the complex interactions between gas and liquid. Due to these reasons, a model which can first predict the internal behaviour of two-phase flow accurately is needed. A2-D experimental rig has been used to study the liquid flow behaviour. From photographic evaluations, valuable insight of the gas-liquid flow in the vessel is obtained. Two models have been tested to evaluate the experimental results. The models are able to predict the local gas hold-up, which is an important variable to predict gas-liquid flow pattern. The first model is the simple zones-in-loops based on the gas and liquid flowing in loops through a series of eight backmixed zones in the half 2-D stirred vessel. The second model is a more complex equal sized square cells network which accommodates a more realistic liquid flow pattern and thus, a more successful prediction of the two-phase flow behaviour. The predicted local gas hold-ups are exhibited on a unique 3-D spatial map. They display very encouraging predictive values in comparison with the experimental results. With improvements in the bubble detection techniques and also by assuming non-uniform bubble size the model has a potential to predict accurately not only the hydrodynamics characteristics, but also the physico-chemical interactions. 1989 Article PeerReviewed application/pdf en http://eprints.utm.my/4816/1/NoorAishahSaidinaAmin1989_EvaluationOfAGasLiquid.pdf Saidina Amin, Nor Aishah and Mann, R (1989) Evaluation of a gas-liquid stirred reactor emulator via network models. Proceedings of The Fifth Symposium Of Malaysian Chemical Engineers . pp. 338-354. |
| spellingShingle | T Technology (General) Saidina Amin, Nor Aishah Mann, R Evaluation of a gas-liquid stirred reactor emulator via network models |
| title | Evaluation of a gas-liquid stirred reactor emulator via network models |
| title_full | Evaluation of a gas-liquid stirred reactor emulator via network models |
| title_fullStr | Evaluation of a gas-liquid stirred reactor emulator via network models |
| title_full_unstemmed | Evaluation of a gas-liquid stirred reactor emulator via network models |
| title_short | Evaluation of a gas-liquid stirred reactor emulator via network models |
| title_sort | evaluation of a gas liquid stirred reactor emulator via network models |
| topic | T Technology (General) |
| url | http://eprints.utm.my/4816/1/NoorAishahSaidinaAmin1989_EvaluationOfAGasLiquid.pdf |
| work_keys_str_mv | AT saidinaaminnoraishah evaluationofagasliquidstirredreactoremulatorvianetworkmodels AT mannr evaluationofagasliquidstirredreactoremulatorvianetworkmodels |