Heat-modeling of microwave assisted epoxidation of palm acid oil
While microwave chemistry could well be the most convenient, rapid and energy-saving way to initiate a chemical reaction, the issues of thermal versus microwave specific effect remain unaddressed. Approach: A three-dimensional Finite Element Model (FEM) was developed to predict temperature profile d...
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my.uniten.dspace-304722023-12-29T15:48:15Z Heat-modeling of microwave assisted epoxidation of palm acid oil Saifuddin N. Zhan L.W. Ning K.X. 22135844300 36976796000 36975914600 Chemo-enzymatic Electromagnetic calculations Energy-saving Finite element model (FEM) Heat-modeling Microwave chemistry Non-thermal effects Palm acid oil (PAO) While microwave chemistry could well be the most convenient, rapid and energy-saving way to initiate a chemical reaction, the issues of thermal versus microwave specific effect remain unaddressed. Approach: A three-dimensional Finite Element Model (FEM) was developed to predict temperature profile during the enzymatic epoxidation of palm acid oil using microwave heating. Three-dimensional partial differential equations are formulated for the electromagnetic field and heat and mass transfer processes. The temperature profile of the FEM generated from the commercial software (ANSYS Emag) was verified using experimental data from microwave oven heated samples containing palm acid oil and reactants in cylindrical bottles and has compared favorably with real time data. An Infra Red thermometer was used to measure temperature of the reactants during the real time experiment to ensure less contact with the reaction vessel. Results: Apart from ascertaining the temperature profile of the epoxidation process in the cylindrical bottle, the heat-modeling of this reaction can predict the Energy required during the reaction and provide insights to non-thermal microwave effects. It has shown the possibility of Microwave Non-Thermal Effects and Microwave Selectivity in Substrate Specificity. The energy used by the microwave irradiated reaction is by far much lesser than the energy used in conventional heating. This study has also improved the epoxidation process of Palm Acid Oil by incorporating enzyme as a catalyst and using microwave heating. Epoxidation can be done rapidly and at a lower level of activation energy of 27.767 kJ mol-1. It is a green process with increased efficiency as it reduced a typically 5-hour reaction to less than an hour. Conclusion: In this study, a quantitative view of a microwave assisted process of enzymatic epoxidation has been established. We have successfully developed and experimentally validated a 3D electromagnetic heat transfer model. This model can thus be used to predict the energy of the epoxidation and other future microwave reactions. the study also have shown the existence of microwave non-thermal effects and microwave selectivity in substrate specificity. � 2010 Science Publications. Final 2023-12-29T07:48:15Z 2023-12-29T07:48:15Z 2011 Article 10.3844/ajassp.2011.217.229 2-s2.0-79953290430 https://www.scopus.com/inward/record.uri?eid=2-s2.0-79953290430&doi=10.3844%2fajassp.2011.217.229&partnerID=40&md5=0458310d7fcc8a6e1c43403ef0534cb5 https://irepository.uniten.edu.my/handle/123456789/30472 8 3 217 229 All Open Access; Hybrid Gold Open Access Scopus |
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Chemo-enzymatic Electromagnetic calculations Energy-saving Finite element model (FEM) Heat-modeling Microwave chemistry Non-thermal effects Palm acid oil (PAO) |
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Chemo-enzymatic Electromagnetic calculations Energy-saving Finite element model (FEM) Heat-modeling Microwave chemistry Non-thermal effects Palm acid oil (PAO) Saifuddin N. Zhan L.W. Ning K.X. Heat-modeling of microwave assisted epoxidation of palm acid oil |
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While microwave chemistry could well be the most convenient, rapid and energy-saving way to initiate a chemical reaction, the issues of thermal versus microwave specific effect remain unaddressed. Approach: A three-dimensional Finite Element Model (FEM) was developed to predict temperature profile during the enzymatic epoxidation of palm acid oil using microwave heating. Three-dimensional partial differential equations are formulated for the electromagnetic field and heat and mass transfer processes. The temperature profile of the FEM generated from the commercial software (ANSYS Emag) was verified using experimental data from microwave oven heated samples containing palm acid oil and reactants in cylindrical bottles and has compared favorably with real time data. An Infra Red thermometer was used to measure temperature of the reactants during the real time experiment to ensure less contact with the reaction vessel. Results: Apart from ascertaining the temperature profile of the epoxidation process in the cylindrical bottle, the heat-modeling of this reaction can predict the Energy required during the reaction and provide insights to non-thermal microwave effects. It has shown the possibility of Microwave Non-Thermal Effects and Microwave Selectivity in Substrate Specificity. The energy used by the microwave irradiated reaction is by far much lesser than the energy used in conventional heating. This study has also improved the epoxidation process of Palm Acid Oil by incorporating enzyme as a catalyst and using microwave heating. Epoxidation can be done rapidly and at a lower level of activation energy of 27.767 kJ mol-1. It is a green process with increased efficiency as it reduced a typically 5-hour reaction to less than an hour. Conclusion: In this study, a quantitative view of a microwave assisted process of enzymatic epoxidation has been established. We have successfully developed and experimentally validated a 3D electromagnetic heat transfer model. This model can thus be used to predict the energy of the epoxidation and other future microwave reactions. the study also have shown the existence of microwave non-thermal effects and microwave selectivity in substrate specificity. � 2010 Science Publications. |
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22135844300 |
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22135844300 Saifuddin N. Zhan L.W. Ning K.X. |
| format |
Article |
| author |
Saifuddin N. Zhan L.W. Ning K.X. |
| author_sort |
Saifuddin N. |
| title |
Heat-modeling of microwave assisted epoxidation of palm acid oil |
| title_short |
Heat-modeling of microwave assisted epoxidation of palm acid oil |
| title_full |
Heat-modeling of microwave assisted epoxidation of palm acid oil |
| title_fullStr |
Heat-modeling of microwave assisted epoxidation of palm acid oil |
| title_full_unstemmed |
Heat-modeling of microwave assisted epoxidation of palm acid oil |
| title_sort |
heat-modeling of microwave assisted epoxidation of palm acid oil |
| publishDate |
2023 |
| _version_ |
1806427510699720704 |
| score |
13.222552 |