Duaa Raja ab Supervisors Javier FernandezGarcia a Ali Hassanpour a Jabbar Gardy a ChunYu Ho b a School of Chemical and Process Engineering University of Leeds Leeds LS2 9JT UK ID: 812404
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Unconventional methods of heating: developing greener processes using radiofrequency
Duaa Raja a,b Supervisors: Javier Fernandez-Garcia a, Ali Hassanpour a, Jabbar Gardy a Chun-Yu. Ho ba School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, UKb Shenzhen Grubbs Institute, Department of Chemistry, Southern University of Science and Technology, 518055, China
Slide2What is a chemical process?
Slide3Conventional Reactors
Mixed flowTubular packed bed
Slide4Radiofrequency heating (RF)
Alternating electromagnetic field causes conducting material to generate heat by eddy currents. RF heating requires the presence of magnetic materials in the reaction mixture, in the form of either magnetic particles, or thin films deposited onto inner reactor walls.A major advantage is that induction only heats the induction target which reduces waste and heating times as a result of higher power density and lower thermal inertiaRF induced hyperthermia has widely been studied using magnetic nanoparticles in biomedicine for
enhancing tumor oxygenation and radio- and chemosensitivity
Slide5Use of RF in catalysis
Major drawbacks of using microwave radiation are the scale-up issues due to the inherently limited penetration depth, which is limited to 5 – 7 cm Heat is provided from outside to inside conductive heating through external heat sourceInefficient heat transfer - the thermal conductivity of the reactor materials results in slow heat transferHeat is transferred inside
out avoiding hot spots and facilitating very high heat transfer rates
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Frequency (kHz)
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RF
Microwave
Infrared
Visible
Typical RF heating frequencies: 100-500 kHz
Slide6HydroalkenylationOlefins are molecules which are widely utilized as starting materials for the synthesis of polymers, petrochemical components to form additives, plasticisers, surfactants and various other commodities.
However, higher substituted olefins are not readily available and require indirect and expensive synthesis routes. Consequently, there is a high demand to advance methods for synthesising high substituted olefins
Slide7HydroalkenylationThis is 100% atom efficient!
Current issues involving slow reaction rate and very high catalyst loadings which are infeasible for industry.
Slide8Summary
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Slide11Thank you